Programmable Relay

ZEN V2 Units

CSM_ZEN_DS_E_5_1

Even Broader Applications with Increased Functionality and Higher Precision
Increased functionality in a compact body (70 mm wide 90 mm high). Easy programming is available using the LCD and operation buttons. (See note 1.) This single Unit easily provides relay, timer, counter, and time switch functions. Expansion is easy with Expansion I/O Units, allowing up to 44 I/O points. (See note 2.) Economy-type and Communications-type CPU Units have been added to series. Improved Weekly Timers (See note 1.) Increased timing accuracy with a monthly deviation of 15 s max. Multiple-day operation and pulse output operation have been added. Select from two power supply options: 100 to 240 VAC or 12 to 24 VDC.
Note: 1. Not supported for ZEN-@C2@@-@-V2 models. 2. When using CPU Units with 20 I/O points.
Refer to Safety Precautions on page 33
The information in this document applies to V2 Units. Refer to page 28 for details on differences with previous products.

Features

Easy and Simple Programming for Automatic Small-scale Control
Saves Space, Wiring, and Installation Steps
Versatile functionality in a compact body (70 mm wide 90 mm high). This single Unit easily provides relay, timer, counter, and time switch functions. Wiring work is greatly reduced because separate wiring is not required for devices such as timers and counters.

Easy Programming

The LCD screen comes with 8 operation buttons on the front panel to enable programming in ladder view format. The LCD screen also has a backlight, making it easier to see when the ZEN is used in dark locations. Note: Not supported for ZEN-@C2@@-@-V2 models.
Flexible Expansion Enables Up to 44 I/O Points
Up to three Expansion I/O Units can be connected if there are not enough I/O points. Expansion I/O Units are only 35 mm wide. Note: CPU Units with 10 I/O points can be expanded to 34 I/O points. Expansion I/O Units cannot be connected to Economy-type CPU Units.
Support Software with Simulation Function
Programs can be easily written, saved, and monitored by personal computer. Programs can be simulated on the personal computer without connecting to the ZEN.
Note: For notebook computers that do not have an RS-232C serial port, connect the computer to the ZEN by connecting an OMRON CS1W-CIF31 USB-Serial Conversion Cable to the ZEN-CIF01 Connecting Cable.
Other Versatile Functions
Use of a Memory Cassette makes it easy to copy and save programs. Equipped with two analog input channels (CPU Units with DC power supply only). Password function ensures security. (See note.) Multi-language display in six languages (English, Japanese, German, French, Spanish, Italian). (See note.) Display user-set messages or analog-converted values. (See note.) Note: Not supported for ZEN-@C2@@-@-V2 models.
Enhanced Features of V2 CPU Units
Improved Weekly Timer and Calendar Timer Functions
Note: Not supported for ZEN-@C2@@-@-V2 models. The time precision has been increased. Conventional model: 2-min difference/month -V2 models: 15-s difference/month (at 25C) Multiple-day operation and pulse-output operation are now possible. These improved functions are convenient for time-controlled applications such as lighting and air conditioning control.
RS-485 Communications Model Added to Series
Production line conditions can be remotely monitored by monitoring the ZEN control status.

Production line Office

More Precise Analog Input
Conventional model: 10% FS -V2 models: 1.5% FS DC power supply models are equipped with two analog inputs (0 to 10 V). There are four analog comparators. The increased precision makes it even easier to use the Unit in simple control applications with voltage, current, temperature, and other analog values.

Lighting control

Air conditioning control
Economy-type Added to the Series
Economy-type CPU Units with a more affordable price have been added to the series, although Expansion I/O Units cannot be added.
8-digit Counter, 150-Hz Counter
An 8-digit counter and 8-digit comparator have been added. The maximum count for DC power supply models is 150 Hz.
12 to 24 VDC Line Voltage Operation

100 to 240 VAC 12 to 24 VDC

Relays

ZEN-10C1AR-A-V2 ZEN-10C1DR-D-V2 ZEN-10C1DT-D-V2 ZEN-20C1AR-A-V2 ZEN-20C1DR-D-V2 ZEN-20C1DT-D-V2 ZEN-10C2AR-A-V2 ZEN-10C2DR-D-V2 ZEN-10C2DT-D-V2 ZEN-20C2AR-A-V2 ZEN-20C2DR-D-V2 ZEN-20C2DT-D-V2 ZEN-10C3AR-A-V2 ZEN-10C3DR-D-V2 ZEN-20C3AR-A-V2 ZEN-20C3DR-D-V2 ZEN-10C4AR-A-V2 ZEN-10C4DR-D-V2 ZEN-KIT01-EV4 ZEN-KIT02-EV4 ZEN-8E1AR (See notes 2, 3.) ZEN-8E1DR (See note 2.)
Communica- 9 tions type ZEN Kit Expansion I/O Units
Set containing CPU Unit (ZEN-10C1AR-A-V2), Connecting Cable, ZEN Support Software, and manual. Set containing CPU Unit (ZEN-10C1DR-D-V2), Connecting Cable, ZEN Support Software, and manual. 8 --100 to 240 VAC 12 to 24 VDC to 240 VAC 12 to 24 VDC Transistors 4 Relays ---

ZEN-8E1DT (See note 2.)

Note: 1. Programming is not possible using only the CPU in the LED-type CPU Unit. ZEN Support Software or a Memory Cassette is required. 2. Cannot be connected to pre-V1 and V1 CPU Units. 3. The ZEN-8E1AR cannot be connected to a CPU Unit with DC power supply.
Power ratings 30 W Input voltage 100 to 240 VAC Output voltage 24 VDC 1.3 A Output current Model ZEN-PA03024
Note: Refer to the ZEN-PA03024 Datasheet (Cat. No. L103) for detailed specifications.
Accessories (Order Separately)
Name Specifications Remarks Enables programs and parameter settings to be saved or copied to another ZEN. (See note 1.) LCD-type CPU Unit with LED-type CPU Unit without display (See note 2.) display (See note 3.) Transfer from ZEN to Memory Transfer from Memory Cassette to ZEN Memory Cassette initialization Connecting Cable 2 m RS-232C (9-pin Dsub connector) Battery Unit --Supported Supported Supported Not supported Automatic transfer when power turned ON Not supported ZEN-CIF01 Model ZEN-ME01 Memory Cassette EEPROM (for data security and copying)
10 years min. Battery life Ladder programs and parameter settings are saved to the CPU Unit EEP-ROM ZEN-BAT01 (at 25C) but calendar, clock, and holding timer bits and holding timer/counter present values are held by the capacitor. Therefore, if the power supply is interrupted for 2 days or more (at 25C), this data will be reset. Use a Battery Unit for systems where the power supply may be interrupted for long periods. Runs on Windows 95, 98, Specifically designed for the ZEN (CD-ROM). 2000, ME, XP, NT 4.0, Vista or 7. (See note 4.) ZEN-SOFT01-V4

ZEN-10C@D@-D-V2: 30 A max. ZEN-20C@D@-D-V2: 30 A max. ZEN-8E1DR: 15 A max.
Ambient temperature Ambient humidity Ambient conditions Mounting method Terminal block Terminal screw tightening torque Degree of protection
Ambient storage temperature 20 to 75C (40 to 75C for ZEN-@C2@@-@-V2 models)
Note: 1. Can be mounted to 35-mm DIN Track. 2. Standard (Vertical) installation Horizontal installation

Characteristics

Item Control method I/O control method Programming language Program capacity Max. No. of control I/O points Stored program control Cyclic scan Ladder diagram 96 lines (3 input conditions and 1 output per line) 44 points (See note 1.) CPU Units with 20 I/O points: 12 inputs and 8 outputs Expansion I/O Units: 4 inputs and 4 outputs each, up to 3 Units. 12 characters 4 lines, with backlight Internal EEPROM, Memory Cassette (optional) Internal holding bit status, holding timer/counter present values, calendar and clock (year, month, day of month, day of week, time) Super capacitor backup time:2 days min. (25C) Life of optional battery: 10 years min. (25C) Accuracy: 15 s/month (at 25C) 0.01 s unit: 0.05% 10 ms max. (rate for set value) min/s unit: 0.05% 1 s max. (rate for set value) h/min unit: 0.05% 1 min max. (rate for set value) 150 Hz: 8-Digit counter (F) set to high-speed operations (CPU Units with DC power supplies only) (The counting speed may be less than 150 Hz depending on the cycle time of the program. See page 21.) 20 M (at 500 VDC) min.: Between power supply terminals and all output terminals. Between terminals of different output circuits. Between all terminals of CPU Unit and all terminals of Expansion I/O Unit. Reinforced insulation Between power supply or input terminals and output terminals. Between terminals of different output circuits. Between all terminals of CPU Unit and all terminals of Expansion I/O Unit. No separation Between power supply and input terminals of the same unit. Between power supply terminals of CPU Unit and computer connector, Battery Unit connector, or all Expansion Unit connectors (all interfaces are live parts). 2,300 VAC, 50/60 Hz for 1 min (leakage current 1 mA max.): Between power supply terminals and all output terminals. Between terminals of different output circuit. Between all terminals of CPU Unit and all terminals of Expansion I/O Unit. Conforms to IEC60068-2-6, 5 to 9 Hz with 3.5-mm single amplitude, 9 to 150 Hz acceleration 9.8 m/s2, 10 sweeps each in X, Y, and Z directions (1 octave/min) Conforms to IEC60068-2-27, 147 m/s2, 3 times each in X, Y, and Z directions. CPU Unit with 10 I/O points: Approx. 300 g max. CPU Unit with 20 I/O points: Approx. 350 g max. Expansion I/O Unit: Approx. 120 g max. Specification

LCD display (See note 2.) User program backup Power interruption hold
Operation buttons (See note 2.) 8 (4 cursor buttons and 4 operation buttons)
Calendar and clock function (See note 2.) Timer accuracy
Maximum counting speed Insulation resistance

Insulation

Dielectric strength
Vibration resistance Shock resistance Weight
Note: 1. Up to 34 points for CPU Units with 10 I/O points. With Communications-type CPU Units, however, the CPU Unit has 6 inputs and 3 outputs, for a maximum of 33 I/O points. 2. Not provided for LED-type CPU Unit without display (i.e., ZEN-@C2@@-@-V2 models).
Communications Specifications (Communications-type CPU Units)
Item Communications Synchronization method Baud rate Transmission code Data bit length Stop bit length Error detection Flow control Interface Retry function Node number RS-485 (two-wire, half duplex) Start-stop synchronization 4800, 9600, or 19200 bps ASCII 7 or 8 bits 1 or 2 bits Vertical parity (none, even, odd), Block check character (BCC) None RS-485 None 0 to 99 (default: 1), XX (broadcasting) ZEN-10C4@R-@-V2

Approved Standards

Item Safety standards Specification cULus: UL508/CSA C22.2 No.142 Class I Div2 Conforms to EN/IEC 61131-2 clause 11, excluding 11.7.2.2 (Overvoltage category 2 and Pollution degree II conforms to IEC 60664-1) Radiation Field Emission Noise Terminal Voltage Emission Electrostatic Discharge Immunity Electromagnetic Field Immunity Electrical Fast Transient/Burst Immunity CISPR11 CISPR11 IEC61000-4-2 IEC61000-4-3 IEC61000-4-4 Class A, Group 1 Class A, Group 1

EMC (See note.)

In air: 8 kV, In contact: 6 kV 10 V/m Power line AC I/O: 2 kV DC I/O: 1 kV Surge Immunity IEC61000-4-5 Normal Noise AC power supply, AC I/O: 1 kV DC power supply, DC I/O: 0.5 kV Common Noise AC power supply, AC I/O: 2 kV DC power supply: 1 kV DC I/O: 0.5 kV Immunity to Conducted Disturbances Induced by Radio-frequency Fields IEC61000-4-6 3V Momentary Power Interruption Immunity IEC61131-2 CPU Units with AC Power Supplies: 10 ms max. CPU Units with DC Power Supplies: 2 ms max. (level: PS1) Note: EMC conforms to EN 61131-2 clause 8 except in the following cases. When Expansion I/O Units with DC inputs are connected to a CPU Unit with an AC power supply, the burst immunity between power supplies will be 1 kv. When the signal wire for transistor outputs exceeds 10 m, the surge immunity of DC output signal lines will not conform.

Input Specifications

AC Inputs (Not Isolated)
Item Input voltage Input impedance Input current ON voltage OFF voltage ON response time OFF response time 680 k 0.15 mA/100 VAC, 0.35 mA/240 VAC 80 VAC min. 25 VAC max. 50 ms or 70 ms at 100 VAC (See note.) 100 ms or 120 ms at 240 VAC (See note.)

CPU Unit with 10 I/O points
ZEN-8E1AR Expansion I/O Unit (AC input type)
CPU Units with 20 I/O Points and Expansion I/O Units
100 to 240 VAC, 50/60 Hz L Circuit protector N Input device
CPU Unit with 20 I/O points
Connecting Expansion I/O Units with DC Inputs
100 to 240 VAC, 50/60 Hz L Circuit protector Input device

L N NC I0 I1 I2 I3 I4 I5

DC power supply

COM IN0 IN1 IN2 IN3

ZEN-8E1DR Expansion I/O Unit (DC inputs and relay outputs)
ZEN-8E1DT Expansion I/O Unit (DC inputs and transistor outputs)
Note: When connecting Expansion I/O Units with DC inputs to a CPU Unit with an AC power supply, the burst noise immunity will be 1 kV (IEC 61000-4-4).
Units with DC Power Supply
Note: 1. Be sure to connect the COM terminal before turning ON the power supply. If the COM terminal is disconnected, or if the wiring is changed after turning ON the power supply, a malfunction may occur. 2. Apply the power supply voltage through a relay or switch in such a way that the voltage reaches the rated value within 4 s. If the voltage is applied gradually, the power may not be reset or unstable output operations may result.
CPU Units with 10 I/O Points
For Connections to Negative () Common (PNP Connection)
For Connecting Analog Input Devices to Input Terminals I4 and I5

COM I 0

Note: When connecting an analog input device, always connect the negative side to the COM terminal.
For Connections to Positive (+) Common (NPN Connection)

Input device +

COM I0

I1 I2 I3 I4 I5

Note: When connected to the positive (+) common, I4 and I5 cannot be used as analog inputs.
CPU Units with 20 I/O Points
For Connections to a Negative Common (PNP Connection)
COM I0 I1 I2 I3 I4 I5 NC I6 I7 I8 I9 Ia Ib
For Connecting Analog Input Devices to Input Terminals Ia and Ib

I6 I 7

CPU Units with 20 I/O points
Note: When connected to the positive (+) common, Ia and Ib cannot be used as analog inputs.
Note: 1. Supply power to both the CPU Unit and Expansion I/O Units from the same power supply and turn them ON and OFF at the same time. 2. ZEN-8E1AR Expansion I/O Units with AC inputs cannot be connected to CPU Units with DC power supply. 3. The input circuit commons for ZEN-8E1DR Expansion I/O Units with relay outputs are each internally connected to one side of the power supply circuit (COM terminal). 4. ZEN-8E1DT Expansion I/O Units with transistor outputs do not need to be connected to a power supply.

For Connections to Negative () Common

COM I0 I1 I2 I3 I4 I5

NC COM IN0 IN1 IN2 IN3

COM IN0 IN1 IN2 IN3

ZEN-8E1DR Expansion I/O Unit (DC input, relay output)
ZEN-8E1DT Expansion I/O Unit (DC input, transistor output)
For Connections to Positive (+) Common

Output Connections

All four relay output circuits in both CPU Units with 10 I/O points and Expansion I/O Units have independent contacts. CPU Units with 20 I/O points have 4 independent contacts (Q0 to Q3) and the remaining four (Q4 to Q7) have 2 points/common. There are no restrictions for polarity.
Standard LCD-type CPU Units, LED-type CPU Units, and Economy-type CPU Units
CPU Unit with 10 I/O Points CPU Unit with 20 I/O Points
Communications-type CPU Units
Communications-type CPU Unit

Expansion I/O Unit

B (+) A ()

OUT 2 OUT OUT 0 1

Load Load

RS-485

Load Load Load Q0 to Q3 Load
For CPU Units with 10 I/O points and Expansion I/O Units, all 4 outputs in the transistor output circuits have independent circuits. The terminals of output have polarity given on the terminal block, but no problem will result from reversing the connection positions of the power supply and load. For CPU Units with 20 I/O points, outputs Q0 to Q3 in the transistor output circuits have independent circuits and outputs Q4 to Q7 have 2 points per common. The terminals of output Q0 to Q3 have polarity given on the terminal block, but no problem will result from reversing the connection positions of the power supply and load. Note: Do not exceed a cable length of 10 m when connecting transistor outputs.
Standard LCD-type CPU Units and LED-type CPU Units without Display
+ Q0 + Q1 + Q2 + Q3 + Q0 + Q1 + Q2 + Q3 + Q4 Q5 + Q6 Q7
Expansion I/O Unit + + OUT2 OUT3 + OUT0 Load Load OUT1 Load Load

OUT0 to OUT3 Load

Q0 to Q3

Nomenclature

Standard LCD-type, Economy-type, and Communications-type CPU Units (Except for ZEN-@C2@@-@-V2 Models)

Left side Front

Power supply Input terminals terminals

Right side

Display screen

Operation buttons

Display Screen
Output terminals (See note 1.) Battery Unit connector (Remove the seal to connect the Battery Unit.) ZEN Support Software connector (also used for Memory Cassette.)
Expansion Unit connector cover (See note 2.) Do not remove this cover until connecting an Expansion Unit.

RUN ERR

Icon Meanings
Icon RUN Meaning Display while in RUN mode. Indicates an error. Displayed when there is a higher-level menu or ladder program line than the one currently displayed. Displayed when there is a lower-level menu or ladder program line than the one currently displayed. Displayed when a password had been set.

Left side

Power supply terminals

Input terminals

20C1AR-A-V2
Output terminals Battery Unit connector (Remove the seal to connect the Battery Unit.) ZEN Support Software connector (also used for Memory Cassette.)
Note: 1. With Communications-type CPU Units, the Q3 terminal is used as the RS-485 terminal. For details, refer to Output Connections on page 15. 2. Economy-type CPU Units are not provided with an Expansion Unit connector. Do not remove the cover.

Operation Buttons

DEL Button ALT Button
Operation Button Names and Operations
Button Menus Function Writing ladder program Setting parameters Button input bit (See page 24.) B6 ON

Cursor Buttons

Deletes inputs, outputs, connection --lines, and blank lines. Switches between normally open --and normally closed conditions. Changes to connection line write mode. Inserts a line.

ESC Button OK Button

Moves the cursor Moves the cursor up and down. up and down. Selects bit types and functions.
Moves the cursor up B5 ON and down. Changes numerals and parameters. B2 ON
Moves the cursor right and left.
Moves the cursor right B3 ON and left. B4 ON
Returns to the Cancels the setting and returns to previous screen. the previous operation. Confirms the setting. Selects the menu item at the cursor position.
Cancels the setting and returns to the previous operation. Confirms the setting.
LED-type CPU Units without Display (ZEN-@C2@@-@-V2)
Power supply terminals Input terminals

LED indicators

LED Indicators
Battery Unit connector (Remove the seal to connect the Battery Unit.) Output terminals ZEN Support Software connector (also used for Memory Cassette.) Expansion Unit connector cover Do not remove this cover until connecting an Expansion Unit.

Name POWER RUN

LED Green Lit Not lit Green Lit Not lit
Status Power is ON. Power is OFF. Operating (RUN) Stopped (STOP) Error occurred. Normal

I8 I9 Ia Ib

Lit Not lit

20C2AR-A-V2

Output terminals Battery Unit connector (Remove the seal to connect the Battery Unit.) ZEN Support Software connector (also used for Memory Cassette.) LED indicators Expansion Unit connector cover Do not remove this cover until connecting an Expansion I/O Unit.
Expansion I/O Units (ZEN-8E1@@)

Output terminals

Expansion I/O Unit connector
Expansion I/O Unit connector cover Do not remove this cover until connecting an Expansion I/O Unit.
Precaution when Using Expansion I/O Units: Up to three Expansion I/O Units can be connected. When removing the Expansion Unit connector cover from the side of the CPU Unit, use a Phillips screwdriver to remove the cover screw, and then insert a flat-blade screw driver in the cover gap to remove the cover, as shown at the right.

Phillips screwdriver

Flat-blade screwdriver

Operation

Name Symbol Bit addresses No. of points Operation Details (See note 1.) --Input bits Expansion input bits Output bits Expansion output bits Work bits Holding bits Timers I X Q Y M H T I0 to Ib 12 (See note 2.) X0 to Xb 12 Reflect the ON/OFF status of the input devices connected to the input terminals on the CPU Unit. Reflect the ON/OFF status of the input devices connected to the input terminals on the Expansion I/O Units. The ON/OFF status of these output bits is used to control the output devices connected to the output terminals on the CPU Unit. The ON/OFF status of these output bits is used to control the output devices connected to the output terminals on the Expansion I/O Units. Work bits can be used only within the ZEN program. I/Os for external devices cannot be made (i.e., all I/O is internal). Used the same as the work bits. However, if the power to the ZEN is turned OFF, these bits also maintain the previous ON/OFF status. X: ON-delay timer : OFF-delay timer O: One-shot pulse timer F: Flashing pulse timer W: Twin timer Holding timers Counters 8-digit counter # C F #0 to #7 C0 to Cf FHold the present value being counted even if the trigger input or power supply is turned OFF and continue timing when the trigger input or power is restored. Reversible 4-digit counters that can be incremented and decremented. Reversible 8-digit counters that can be incremented and decremented. CPU Units with DC power supply support a high-speed counter up to 150 Hz. For details, refer to 8-digit Counter Operation on page 21. Turn ON and OFF during specified times on specified days. Turn ON and OFF between specified dates. Display user-specified messages, times, timer/counter present values, or analog-converted values. Used as program input conditions to output analog comparator comparison results. These bits can be used only for CPU Units with DC power supply. Compare the present values of timers (T), holding timers (#), and counters (C). Comparison can be made between the same two counters or timers, or with constants. Used to compare the present values of 8-digit counters (F) and output the comparison results. Used as program input conditions and turn ON when operation buttons are pressed in RUN Mode. Functions are selected from the screen when parameter settings are made. Time units can be selected from the following: 0.01-s unit: 0.01 to 99.99 s min/s unit: 00 min 01 s to 99 min 59 s h/s unit: 00 h 01 min to 99 h 59 min

Trigger input Timing Timing Timing Timing (OFF-time) (ON-time) (OFF-time) (ON-time) Output

W: Twin timer

Trigger input Reset input ON-time OFF-time Present value 0 Timer bit
Main Applications Useful for intermittent (ON/OFF) operation, such as that used for fans.

3. Using Holding Timers

Trigger input Reset input Setting Present value
Turns ON after set delay after the trigger input turns ON. The present value is held while the trigger input is OFF. Main Applications To continue operation after momentary power loss or power interruptions. Also can be used when delayed operation or a time lag is required.

Timer bit

4. Counter Operation
Counter direction specification input Counter input Reset input Set value Present value 0000 Counter bit
The counter bit turns ON when the counter value (present value) reaches the set value (present value set value). The counter returns to 0 and the counter bit turns OFF when the reset input turns ON. Count inputs are not accepted while the reset input is turned ON. The counter present value and counter bit (ON/OFF) are held even if the operating mode is changed or the power supply is interrupted.
5. 8-digit Counter Operation

Count speed H High speed

Counter direction specification input Counter input Reset input
The counter bit turns ON when the counter value (present value) reaches the set value (present value set value). The counter returns to 0 and the counter bit turns OFF when the reset input turns ON. Count inputs are not accepted while the reset input is turned ON. The counter present value and counter bit (ON/OFF) are held even if the operating mode is changed or the power supply is interrupted. High-speed Operation For CPU Units with DC power supply, high-speed operation is possible for input I0 only. (Maximum counting speed: 150 Hz)

Low speed

Set value Present value 00000000 Counter bit
Counting Speed of the 8-digit Counter
The maximum counting speed of the 8-digit counter is 150 Hz. When the ladder program volume is large, however, this speed will be less than 150 Hz. Calculate the cycle time and confirm the maximum counting speed using the following formula. The calculation serves as a guide only, so allow a suitable margin in the actual machine. Maximum counting speed = 1,000,000 Hz/ Cycle time (s) 2.2 Hz Note: Even if the calculated maximum counting speed exceeds 150 Hz using this formula, the maximum counting speed will be 150 Hz. Cycle Time Calculation Method

Cycle time (s) = Common processing time + Processing time taken when Expansion I/O Units are connected + Ladder program execution time + Communications processing time (only for CPU Units with communications)
Refer to the following table for ZEN execution times. The execution times are provided as a guide. External factors, button operations, execution of ZEN Support Software operations, and timing of the processing affects the actual processing times. Common Processing Time
Unit type Standard LCD-type CPU Units, Economy-type CPU Units, and Communications-type CPU Units LED-type CPU Units Common processing time 850 s 200 s
Ladder Program Execution Time
Per line 30 s: Line containing program 7 s: Empty lines Expansion I/O Unit output bits (Y) Work bits (M) Holding bits (H) Timers (T)/Holding timers (#) Counters (C)/8-Digit Counters (F) Display bits (D) 15 s 13 s Hour and minute (CLK)/Year and month (DAT)/Month and day (DAT1): 21 s Timers (T)/Holding timers (#)/ Counters (C)/Analog comparators: 28 s Characters (CHR)/8-Digit Counters (F): 38 s 4 s 1 s 3 s 7 s 4 s *5 *4 *3 *1 *2
Per output CPU Unit output bits (Q) 4 s
Expansion I/O Unit Processing Time
Unit type Expansion I/O Units Expansion I/O Unit processing time 160 s per Unit
Communications Processing Time (only for CPU Units with Communications)
Reading information Writing set values Writing time information 170 s Twin timer: 11,000 s Others: 6,000 s 820 s
Weekly timers (@) Calendar timers (*) Analog comparators (A) Comparators (P) 8-Digit Comparators (G)
Example Calculation of Ladder Program Execution Time

I0 Q0 I3 I4 @0

Ladder program execution time = (30 5) + (4 3) + 15 + 4 + 7 = 188 (s) *5: P0

[Q1 TT0 P0 T0 [Q2

*4: @0 *3: T0 (output) *2: Q (outputs) for 3 points *1: For 5 lines
6. Weekly Timer Operation (Only for Standard LCD-type, Economy-type, and Communicationstype CPU Units)
Weekly timer mode N Normal operation Typical Timer Operation

Date setting 24:00

Time setting
Operation Between Tuesday and Friday every week, the weekly timer bit turns ON from 08:15 until 17:30.

Fri Sat Sun

Stop time Start time

17:30 8:15 0:00

Model numbers have been changed to reflect the improved functionality.

Previous Model Numbers

ZEN-@C@@@-@ ZEN-@C@@@-@-V1 ZEN-@E@@ (Pre-V1 CPU Units) (V1 CPU Units) (4E/8E-type Expansion I/O Units)

New Model Numbers

ZEN-@C@@@-@-V2 ZEN-8E1@@ (V2 CPU Units) (8E1-type Expansion I/O Unit)
Memory Cassettes, Connecting Cables, and Battery Units have not been changed and can be used as they are with the new models.
Precautions when Switching from Previous Units
Previous models of Expansion I/O Units cannot be connected to V2 CPU Units. ZEN-8E1@R Expansion I/O Units with relay outputs need to be connected to a power supply. A ZEN-@C@D@-D-V2 CPU Unit with DC power supply cannot be connected to an Expansion I/O Unit with AC inputs. When connecting Expansion I/O Units with DC inputs to a CPU Unit with an AC power supply, the burst noise immunity will be 1 kV (IEC 610004-4). There is no change to the 8 A per contact for relay output, but the total output for all contacts must be as follows: Units with 10 I/O Points: 20 A max. (15 A max. for Communications-type CPU Units) Units with 20 I/O Points: 40 A max. Expansion I/O Units: 20 A max. Always use the ZEN-SOFT01-V4 Support Software for V2 CPU Units. Input wiring for CPU Units with DC power supplies differs from that for Pre-V1 CPU Units. Refer to the following diagrams. V2 and V1 CPU Units COM wiring depends on whether a negative common or positive common is being used.
Negative () COM Wiring 24 VDC COM wiring required. Analog inputs possible. Input devices +
Pre-V1 CPU Units The input circuit common terminal is connected internally to the negative () side of the power supply circuit.

24 VDC

Analog inputs possible. Input devices

Positive (+) COM Wiring

COM wiring required.

Input devices

+ CPU Unit with 10 I/O Points
CPU Unit with 10 I/O Points
Note: I4 and I5 (Ia and Ib for CPU Units with 20 I/O points) cannot be used as analog input terminals.

Changes

Ratings and Specifications
Item Rated power Models with DC supply voltage power supply Power consumption Models with AC power supply Models with DC power supply Inrush current Models with AC power supply Models with DC power supply DC inputs I0 to I3 (See note 1.) Input impedance ON voltage Input common DC inputs I4 to I5 (See note 2.) Input impedance ON voltage OFF voltage Analog inputs Input impedance I4 to I5 Accuracy (See note 2.) Control outputs Relay outputs Models with 10 I/O points: 4.5 A max. Models with 20 I/O points: 4.5 A max. Models with 10 I/O points: 30 A max. Models with 20 I/O points: 30 A max. 5.3 k 8 VDC min. Independent common terminal 5.2 to 5.5 k 8 VDC min. 3 VDC max. 100 k min. 1.5% FS (at ambient operating temperature within rated range) 8 A per output Total for all outputs must be as follows: Units with 10 I/O Points: 20 A max. (15 A max. for Communications-type CPU Units) Units with 20 I/O Points: 40 A max. 15 s or less per month (at 25C) 5 k 16 VDC min. 5 VDC max. 150 k min. 10% FS (at ambient operating temperature within rated range) 8 A per output 10.8 to 28.8 VDC See Ratings on page 7. V2 Units V1 Units 20.4 to 26.4 VDC 30 VA max. (with 3 Expansion I/O Units connected) 6.5 W max. (with 3 Expansion I/O Units connected) 40 A max. 20 A max. 5 k 16 VDC min. Internally connected to power supply terminal 4.8 k Pre-V1 Units

20 I/O points Restrictions Restrictions (See notes 1, 2, and 3.) (See notes 2 and 3.) 10 I/O points Restrictions Restrictions (See notes 1, 2, and 4.) (See notes 2 and 4.) 20 I/O points Restrictions (See notes 1 to 4.)
Restrictions Restrictions (See notes 2, 3, and 4.) (See note 4.)
Note: 1. The display functions (display clear: -CD@ and day/month display: DAT1) cannot be used and will be ignored. 2. Only the memory area ranges supported by the pre-V1 CPU Units can be used for Timers, Holding Timers, Counters, Weekly Timers, Calendar Timers, and Displays (i.e., only half of each). 3. Only 6 inputs and 4 outputs can be used in the CPU Unit I/O bits. Any others will be ignored. 4. Twin timer operation for timers, multiple-day operation and pulse operation for weekly timers, the 8-digit counter, and 8-digit comparators cannot be used. New Zealand and Australia cannot be set for Daylight Saving Time (DST).
Support Software and CPU Unit Combinations
CPU Unit system software Ver. 1.0 ZEN-SOFT01 Ver. 1.0 (Pre-V1 Units) Ver. 1.1 (Pre-V1 Units) Ver. 2.0 (V1 CPU Units) OK Restrictions (See note 1.) 10 I/O points Restrictions (See notes 1 and 2.) 20 I/O points Not applicable. Ver. 3.0 (V2 CPU Units) Not applicable. OK OK Restrictions (See note 2.) Not applicable. Not applicable. Support Software Ver. 2.0 ZEN-SOFT01-V2 Ver. 3.0 ZEN-SOFT01-V3 Restrictions (See notes 1 and 2.) Restrictions (See note 2.) OK OK Not applicable. Ver. 4.1 ZEN-SOFT01-V4 Restrictions (See notes 1, 2, and 3.) Restrictions (See notes 2 and 3.) Restrictions (See note 3.) Restrictions (See note 3.) OK
Note: 1. The display functions (display clear: -CD@ and day/month display: DAT1) cannot be used and will be ignored. 2. Only the memory area ranges supported by the pre-V1 CPU Units can be used for Timers, Holding Timers, Counters, Weekly Timers, Calendar Timers, and Displays (i.e., only half of each). 3. Twin timer operation for timers, multiple-day operation and pulse operation for weekly timers, the 8-digit counter, and 8-digit comparators cannot be used. New Zealand and Australia cannot be set for Daylight Saving Time (DST).
Difference between ZEN Programmable Relays and PLC Ladder Program Execution

ZEN Programmable Relays

IQIBus bar I4 T0 [ Q1 TT0 [ Q2
Executed sequentially from the bus bar.

OMRON SYSMAC PLCs

IQII4 T0 [ Q1 TT0 [ Q2 END I1 I2 [ Q0

I2 [ Q0

ZEN executes the entire ladder program (up to 96 lines) from the first to last line at one time. Each row is executed in order from left to right starting from the left bus bar.
PLCs execute ladder programs one rung (circuit) at a time, starting with the top rung and executing it in order from the left. When the END instruction is reached, the program is executed again from the first rung.

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's application or use of the products. At the customer's request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply to the products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product, machine, system, or other application or use. The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses listed may be suitable for the products: Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog. Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations. Systems, machines, and equipment that could present a risk to life or property. Please know and observe all prohibitions of use applicable to the products. NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.

Disclaimers

CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the products may be changed without any notice. When in doubt, special model numbers may be assigned to fix or establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.

PERFORMANCE DATA

Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of OMRONs test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and Limitations of Liability.

Programmable Relay

ZEN V2 Units
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Refer to Warranty and Application Considerations on page 36, and Precautions for Safe Use on page 34.
Even Broader Applications with Increased Functionality and Higher Precision
Increased functionality in a compact body (70 mm wide 90 mm high). Easy programming is available using the LCD and operation buttons. (See note 1.) This single Unit easily provides relay, timer, counter, and time switch functions. Expansion is easy with Expansion I/O Units, allowing up to 44 I/O points. (See note 2.) Economy-type and Communications-type CPU Units have been added to series. Improved Weekly Timers (See note 1.) Increased timing accuracy with a monthly deviation of 15 s max. Multiple-day operation and pulse output operation have been added. Select from two power supply options: 100 to 240 VAC or 12 to 24 VDC.
Note: 1. Not supported for ZEN-@C2@@-@-V2 models. 2. When using CPU Units with 20 I/O points.
The information in this document applies to V2 Units. Refer to page 28 for details on differences with previous products.

Features

Easy and Simple Programming for Automatic Small-scale Control
Saves Space, Wiring, and Installation Steps
Versatile functionality in a compact body (70 mm wide 90 mm high). This single Unit easily provides relay, timer, counter, and time switch functions. Wiring work is greatly reduced because separate wiring is not required for devices such as timers and counters.

Easy Programming

The LCD screen comes with 8 operation buttons on the front panel to enable programming in ladder view format. The LCD screen also has a backlight, making it easier to see when the ZEN is used in dark locations. Note: Not supported for ZEN-@C2@@-@-V2 models.
Flexible Expansion Enables Up to 44 I/O Points
Up to three Expansion I/O Units can be connected if there are not enough I/O points. Expansion I/O Units are only 35 mm wide. Note: CPU Units with 10 I/O points can be expanded to 34 I/O points. Expansion I/O Units cannot be connected to Economy-type CPU Units.
Support Software with Simulation Function
Programs can be easily written, saved, and monitored by personal computer. Programs can be simulated on the personal computer without connecting to the ZEN.
Note: For notebook computers that do not have an RS-232C serial port, connect the computer to the ZEN by connecting an OMRON CS1W-CIF31 USB-Serial Conversion Cable to the ZEN-CIF01 Connecting Cable.
Other Versatile Functions
Use of a Memory Cassette makes it easy to copy and save programs. Equipped with two analog input channels (CPU Units with DC power supply only). Password function ensures security. (See note.) Multi-language display in six languages (English, Japanese, German, French, Spanish, Italian). (See note.) Display user-set messages or analog-converted values. (See note.) Note: Not supported for ZEN-@C2@@-@-V2 models.
Enhanced Features of V2 CPU Units
Improved Weekly Timer and Calendar Timer Functions
Note: Not supported for ZEN-@C2@@-@-V2 models. The time precision has been increased. Conventional model: 2-min difference/month -V2 models: 15-s difference/month (at 25C) Multiple-day operation and pulse-output operation are now possible. These improved functions are convenient for time-controlled applications such as lighting and air conditioning control.

Power ratings 30 W Input voltage 100 to 240 VAC Output voltage 24 VDC 1.3 A Output current Model ZEN-PA03024
Note: Refer to the ZEN-PA03024 Datasheet (Cat. No. L103) for detailed specifications.
Accessories (Order Separately)
Name Specifications Remarks Enables programs and parameter settings to be saved or copied to another ZEN. (See note 1.) LCD-type CPU Unit with LED-type CPU Unit without display (See note 2.) display (See note 3.) Transfer from ZEN to Memory Transfer from Memory Cassette to ZEN Memory Cassette initialization Connecting Cable 2 m RS-232C (9-pin Dsub connector) Battery Unit --Supported Supported Supported Not supported Automatic transfer when power turned ON Not supported ZEN-CIF01 Model ZEN-ME01 Memory Cassette EEPROM (for data security and copying)
10 years min. Battery life Ladder programs and parameter settings are saved to the CPU Unit EEP-ROM ZEN-BAT01 but calendar, clock, and holding timer bits and holding timer/counter present (at 25C) values are held by the capacitor. Therefore, if the power supply is interrupted for 2 days or more (at 25C), this data will be reset. Use a Battery Unit for systems where the power supply may be interrupted for long periods. Runs on Windows 95, 98, Specifically designed for the ZEN (CD-ROM). 2000, ME, XP, or NT 4.0. ZEN-SOFT01-V4

ZEN Support Software

Note: 1. Memory Cassettes created using a CPU Unit can be read to other CPU Units, regardless of which model is used. Restrictions, apply, however, to the functions that can be used, depending on the CPU Unit version combination. For details, refer to Memory Cassette and CPU Unit Combinations on page 33. 2. Standard LCD-type, Economy-type, and Communications-type CPU Units (i.e., excluding ZEN-@C2@@-@-V2 models). 3. LED-type CPU Unit without display (i.e., ZEN-@C2@@-@-V2 models).
Mounting Accessories (Order Separately)
Name Mounting Track Specifications 50 cm (l) 7.3 mm (t) 1 m (l) 7.3 mm (t) 1 m (l) 16 mm (t) End Plate Spacer Model PFP-50N PFP-100N PFP-100N2 PFP-M PFP-S

System Configuration

Power Supply Unit Battery Unit CPU Unit Expansion I/O Units

Connecting Cable

Memory Cassette
Note: 1. Up to 3 Expansion I/O Units can be connected to any type of CPU Unit except for Economy-type CPU Units. Expansion I/O Units with AC Inputs, however, cannot be connected to CPU Units with DC Power Supplies. 2. The Connecting Cable and Memory Cassette cannot be connected to the ZEN at the same time. 3. Programs cannot be written to LED-type CPU Units (i.e., ZEN-@C2@@-@-V2 models) without the ZEN Support Software or a Memory Cassette.

Specifications

Ratings
Item ZEN-@C@AR-A-V2/ZEN-8E1AR Rated supply voltage Operating voltage range Power consumption 100 to 240 VAC, 50/60 Hz 85 to 264 VAC CPU Units without Expansion I/O Units ZEN-10C1AR-A-V2/ZEN-10C2AR-A-V2/ ZEN-10C3AR-A-VV AC: 5 VA max. 240 V AC: 7 VA max. ZEN-10C4AR-A-VV AC: 6 VA max. 240 V AC: 8 VA max. ZEN-20C@AR-A-VV AC: 7 VA max. 240 V AC: 10 VA max. CPU Units with three Expansion I/O Units ZEN-10C1AR-A-V2/ZEN-10C2AR-A-VV AC: 6 VA max. 240 V AC: 8 VA max. ZEN-10C4AR-A-VV AC: 7 VA max. 240 V AC: 9 VA max. ZEN-20C@AR-A-VV AC: 8 VA max. 240 V AC: 11 VA max. Expansion I/O Units ZEN-8E1AR 100 V AC: 3 VA max. 240 V AC: 4 VA max. Inrush current ZEN-10C@AR-A-V2: 4.5 A max. ZEN-20C@AR-A-V2: 4.5 A max. ZEN-8E1AR: 4 A max. 0 to 55C (25 to 55C for ZEN-@C2@@-@-V2 models) 10% to 90% (with no condensation) No corrosive gases Surface mounting, DIN track mounting (standard (vertical) installation and horizontal installation) (See notes 1 and 2.) Solid-line terminal block (use solid wire or fine-stranded wire) 0.565 to 0.6 Nm (5 to 5.3 in-lb) IP20 (Mounted inside a control panel) Specification ZEN-@C@D@-D-V2/ZEN-8E1D@ 12 to 24 VDC (DC ripple rate: 5% max.) 10.8 to 28.8 VDC CPU Units without Expansion I/O Units ZEN-10C@DR-D-V2 12/24 V DC: 3 W max. (ZEN-10C3DR-D-V2: 2.8 W max.) ZEN-10C@DT-D-V2 12/24 V DC: 2 W max. ZEN-20C@DR-D-V2 12/24 V DC: 4 W max. ZEN-20C@DT-D-V2 12/24 V DC: 2 W max. CPU Units with three Expansion I/O Units ZEN-10C@DR-D-V2 12/24 V DC: 4 W max. ZEN-10C@DT-D-V2 12/24 V DC: 3 W max. ZEN-20C@DR-D-V2 12/24 V DC: 5 W max. ZEN-20C@DT-D-V2 12/24 V DC: 3 W max. Expansion I/O Units ZEN-8E1DR 12/24 V DC: 2 W max.
ZEN-10C@D@-D-V2: 30 A max. ZEN-20C@D@-D-V2: 30 A max. ZEN-8E1DR: 15 A max.
Ambient temperature Ambient humidity Ambient conditions Mounting method Terminal block Terminal screw tightening torque Degree of protection
Ambient storage temperature 20 to 75C (40 to 75C for ZEN-@C2@@-@-V2 models)
Note: 1. Can be mounted to 35-mm DIN Track. 2. Standard (Vertical) installation Horizontal installation

Characteristics

Item Control method I/O control method Programming language Program capacity Max. No. of control I/O points Stored program control Cyclic scan Ladder diagram 96 lines (3 input conditions and 1 output per line) 44 points (See note 1.) CPU Units with 20 I/O points: 12 inputs and 8 outputs Expansion I/O Units: 4 inputs and 4 outputs each, up to 3 Units. 12 characters 4 lines, with backlight Internal EEPROM, Memory Cassette (optional) Internal holding bit status, holding timer/counter present values, calendar and clock (year, month, day of month, day of week, time) Super capacitor backup time: 2 days min. (25C) Life of optional battery: 10 years min. (25C) Accuracy: 15 s/month (at 25C) 0.01 s unit: 0.05% 10 ms max. (rate for set value) min/s unit: 0.05% 1 s max. (rate for set value) h/min unit: 0.05% 1 min max. (rate for set value) 150 Hz: 8-Digit counter (F) set to high-speed operations (CPU Units with DC power supplies only) (The counting speed may be less than 150 Hz depending on the cycle time of the program. See page 21.) 20 M (at 500 VDC) min.: Between power supply terminals and all output terminals. Between terminals of different output circuits. Between all terminals of CPU Unit and all terminals of Expansion I/O Unit. Reinforced insulation Between power supply or input terminals and output terminals. Between terminals of different output circuits. Between all terminals of CPU Unit and all terminals of Expansion I/O Unit. No separation Between power supply and input terminals of the same unit. Between power supply terminals of CPU Unit and computer connector, Battery Unit connector, or all Expansion Unit connectors (all interfaces are live parts). 2,300 VAC, 50/60 Hz for 1 min (leakage current 1 mA max.): Between power supply terminals and all output terminals. Between terminals of different output circuit. Between all terminals of CPU Unit and all terminals of Expansion I/O Unit. Conforms to IEC60068-2-6, 5 to 9 Hz with 3.5-mm single amplitude, 9 to 150 Hz acceleration 9.8 m/s2, 10 sweeps each in X, Y, and Z directions (1 octave/min) Conforms to IEC60068-2-27, 147 m/s2, 3 times each in X, Y, and Z directions. CPU Unit with 10 I/O points: Approx. 300 g max. CPU Unit with 20 I/O points: Approx. 350 g max. Expansion I/O Unit: Approx. 120 g max. Specification

LCD display (See note 2.) User program backup Power interruption hold
Operation buttons (See note 2.) 8 (4 cursor buttons and 4 operation buttons)
Calendar and clock function (See note 2.) Timer accuracy
Maximum counting speed Insulation resistance

Insulation

Dielectric strength
Vibration resistance Shock resistance Weight
Note: 1. Up to 34 points for CPU Units with 10 I/O points. With Communications-type CPU Units, however, the CPU Unit has 6 inputs and 3 outputs, for a maximum of 33 I/O points. 2. Not provided for LED-type CPU Unit without display (i.e., ZEN-@C2@@-@-V2 models).
Communications Specifications (Communications-type CPU Units)
Item Communications Synchronization method Baud rate Transmission code Data bit length Stop bit length Error detection Flow control Interface Retry function Node number RS-485 (two-wire, half duplex) Start-stop synchronization 4800, 9600, or 19200 bps ASCII 7 or 8 bits 1 or 2 bits Vertical parity (none, even, odd), Block check character (BCC) None RS-485 None 0 to 99 (default: 1), XX (broadcasting) ZEN-10C4@R-@-V2

Approved Standards

Item Safety standards Specification cULus: UL508/CSA C22.2 No.142 Class I Div2 Conforms to EN/IEC 61131-2 clause 11, excluding 11.7.2.2 (Overvoltage category 2 and Pollution degree II conforms to IEC 60664-1) Radiation Field Emission Noise Terminal Voltage Emission Electrostatic Discharge Immunity Electromagnetic Field Immunity Electrical Fast Transient/Burst Immunity CISPR11 CISPR11 IEC61000-4-2 IEC61000-4-3 IEC61000-4-4 Class A, Group 1 Class A, Group 1

EMC (See note.)

In air: 8 kV, In contact: 6 kV 10 V/m Power line AC I/O: 2 kV DC I/O: 1 kV Surge Immunity IEC61000-4-5 Normal Noise AC power supply, AC I/O: 1 kV DC power supply, DC I/O: 0.5 kV Common Noise AC power supply, AC I/O: 2 kV DC power supply: 1 kV DC I/O: 0.5 kV Immunity to Conducted Disturbances Induced by Radio-frequency Fields IEC61000-4-6 3V Momentary Power Interruption Immunity IEC61131-2 CPU Units with AC Power Supplies: 10 ms max. CPU Units with DC Power Supplies: 2 ms max. (level: PS1) Note: EMC conforms to EN 61131-2 clause 8 except in the following cases. When Expansion I/O Units with DC inputs are connected to a CPU Unit with an AC power supply, the burst immunity between power supplies will be 1 kv. When the signal wire for transistor outputs exceeds 10 m, the surge immunity of DC output signal lines will not conform.

IN IN COM

6.2 k (See note 2.)

Internal circuit

Output Specifications (CPU Units and Expansion I/O Units)

Units with Relay Outputs

Item Specifications Circuit drawing Maximum switching capacity 250 VAC/8 A (resistive load: cos = 1) 24 VDC/5 A (resistive load) Use the following values for the total of all outputs. CPU Units with 10 I/O points: 20 A max. (15 A max. for Communications-type CPU Units) CPU Units with 20 I/O points: 40 A max. Expansion I/O Units: 20 A max. Minimum switching capacity 5 VDC/10 mA (resistive load) Relay life Electrical Mechanical ON response time OFF response time Resistive load: 50,000 times (cos = 1) Inductive load: 50,000 times (cos = 0.4) 10 million times 15 ms max. 5 ms max.

L Q5/Q7

Q0 to Q3/OUT0 to OUT3 L
Q4/Q6 L COM Models with 20 I/O points only
The life under the worst conditions, of the output contacts used in ZEN relay outputs is given in the above table. Guidelines for the normal life of the relays are shown in the diagram on the right. Note: The switching capacity, switching durability, and applicable load area when actually using the relay depend on the type of load, environmental conditions, and switching conditions. Therefore, be sure to confirm these conditions for the actual machine before use.
Life-test Curve (Reference Value)

Usage: 360 times/hour

Life ( 103) 1,300 250-VAC resistive load 24-VDC resistive load/ 250-VAC inductive load 24-VDC inductive load (t = 7 ms)

10 Contact current (A)

Units with Transistor Outputs
Item Specifications Circuit drawing Each circuit is configured with an independent common circuit
Maximum switching capacity 24 VDC +20%, 500 mA

Q0 to Q3/OUT0 to OUT3

Leakage current

0.1 mA max.

28.8 VDC max.

Residual voltage

1.5 V max.

Internal circuit COM +

28.8 VDC max. Models with 20 I/O points only

ON response time

1 ms max.

OFF response time

Connections

Input Connections

Units with AC Power Supply
Note: 1. Supply power to both the CPU Unit and Expansion I/O Units from the same power supply and turn them ON and OFF at the same time. 2. The input circuit commons for CPU Units with AC power supply are internally connected to the N terminal of the power supply circuit. Wire the L terminal to the power supply of the input device. 3. The input circuit commons for Expansion I/O Units with AC power supply are internally connected to the N terminal of the power supply circuit. Wire the L terminal to the power supply of the input device.

CPU Units with 10 I/O Points and Expansion I/O Units
100 to 240 VAC, 50/60 Hz L N Circuit protector

Input device

IN0 IN1 IN2 IN3
CPU Unit with 10 I/O points
ZEN-8E1AR Expansion I/O Unit (AC input type)
CPU Units with 20 I/O Points and Expansion I/O Units
100 to 240 VAC, 50/60 Hz L Circuit protector N Input device
CPU Unit with 20 I/O points
Connecting Expansion I/O Units with DC Inputs
100 to 240 VAC, 50/60 Hz L Circuit protector Input device

L N NC I0 I1 I2 I3 I4 I5

DC power supply

COM IN0 IN1 IN2 IN3

ZEN-8E1DR Expansion I/O Unit (DC inputs and relay outputs)
ZEN-8E1DT Expansion I/O Unit (DC inputs and transistor outputs)
Note: When connecting Expansion I/O Units with DC inputs to a CPU Unit with an AC power supply, the burst noise immunity will be 1 kV (IEC 61000-4-4).
Units with DC Power Supply
Note: 1. Be sure to connect the COM terminal before turning ON the power supply. If the COM terminal is disconnected, or if the wiring is changed after turning ON the power supply, a malfunction may occur. 2. Apply the power supply voltage through a relay or switch in such a way that the voltage reaches the rated value within 4 s. If the voltage is applied gradually, the power may not be reset or unstable output operations may result.
CPU Units with 10 I/O Points
For Connections to Negative () Common (PNP Connection)
For Connecting Analog Input Devices to Input Terminals I4 and I5

COM I 0

Note: When connecting an analog input device, always connect the negative side to the COM terminal.
For Connections to Positive (+) Common (NPN Connection)

Input device +

COM I0

I1 I2 I3 I4 I5

Note: When connected to the positive (+) common, I4 and I5 cannot be used as analog inputs.
CPU Units with 20 I/O Points
For Connections to a Negative Common (PNP Connection)
COM I0 I1 I2 I3 I4 I5 NC I6 I7 I8 I9 Ia Ib
For Connecting Analog Input Devices to Input Terminals Ia and Ib

I6 I 7

CPU Units with 20 I/O points
Note: When connected to the positive (+) common, Ia and Ib cannot be used as analog inputs.
Note: 1. Supply power to both the CPU Unit and Expansion I/O Units from the same power supply and turn them ON and OFF at the same time. 2. ZEN-8E1AR Expansion I/O Units with AC inputs cannot be connected to CPU Units with DC power supply. 3. The input circuit commons for ZEN-8E1DR Expansion I/O Units with relay outputs are each internally connected to one side of the power supply circuit (COM terminal). 4. ZEN-8E1DT Expansion I/O Units with transistor outputs do not need to be connected to a power supply.

#0 to #7 C0 to Cf F0

Hold the present value being counted even if the trigger input or power supply is turned OFF and continue timing when the trigger input or power is restored. Reversible 4-digit counters that can be incremented and decremented. Reversible 8-digit counters that can be incremented and decremented. CPU Units with DC power supply support a high-speed counter up to 150 Hz. For details, refer to 8-digit Counter Operation on page 21. Turn ON and OFF during specified times on specified days. Turn ON and OFF between specified dates. Display user-specified messages, times, timer/counter present values, or analog-converted values. Used as program input conditions to output analog comparator comparison results. These bits can be used only for CPU Units with DC power supply. Compare the present values of timers (T), holding timers (#), and counters (C). Comparison can be made between the same two counters or timers, or with constants. Used to compare the present values of 8-digit counters (F) and output the comparison results. Used as program input conditions and turn ON when operation buttons are pressed in RUN Mode.
Weekly timers (See note 3.) Calendar timers (See note 3.) Display bits (See note 3.)
@0 to @f *0 to *f D0 to Df A0 to A3 P0 to Pf
Analog comparator bits A Timer/counter comparator bits 8-digit counter comparator bits Button input bits (See note 3.) P

G0 to G3 B0 to B7

Note: 1. For details, refer to the indicated item numbers on the following pages. 2. CPU Units with 10 I/O points have 6 input bits (I0 to I5) and 4 output bits (Q0 to Q3). Output bit Q3 of Communications-type CPU Units, however, cannot be output externally. It can be used as a work bit. 3. These input bits are not supported by LED-type CPU Units without display.
1. Additional Bit Output Functions

[: Normal S: Set

I0 [Q0 I1 SQ1 I2 RQ1
Set/Reset operation R: Reset

A: Alternate

Q0 will turn ON or OFF depending Q1 will stay ON once the execution Q1 is forced OFF when the on the ON/OFF status of the condition I1 has turned ON once. A execution condition I2 is turned execution condition I0. reset is used to turn Q1 OFF. ON.
Q2 alternates between turning ON and OFF when the execution condition I3 turns ON.
2. Using Timers and Holding Timers

X: ON-delay timer

Trigger input Reset input Setting Present value 0 Timer bit Output Trigger input Timing
Turns ON after set delay after the trigger input turns ON. Basic Operation
Main Applications When delayed operation or a time lag is required. Stays ON while the trigger input is ON and turns OFF after a set delay after the trigger input has turned OFF. Basic Operation

Trigger input Timing Output

: OFF-delay timer

Trigger input Reset input Setting Present value 0 Timer bit
Main Applications Useful for OFF delay circuits for lights or fans Turns ON for a set period after the trigger input turns ON and regardless of how long the trigger input remains ON. Basic Operation

Trigger input

O: One-shot pulse timer

Timing Output

Main Applications Useful for set operations where operation is always required during a regular period only. Repeatedly turns ON and OFF in a set cycle while the trigger input is ON. Basic Operation
Trigger input Timing Output Timing Timing Timing

F: Flashing pulse timer

Main Applications Useful for flashing emergency lights or sounding buzzers as the output for an alarm circuit. Repeatedly turns ON and OFF in a set cycle while the trigger input is ON. Independent ON- and OFF-time settings are possible. Basic Operation
Trigger input Timing Timing Timing Timing (OFF-time) (ON-time) (OFF-time) (ON-time) Output

W: Twin timer

Trigger input Reset input ON-time OFF-time Present value 0 Timer bit
Main Applications Useful for intermittent (ON/OFF) operation, such as that used for fans.

3. Using Holding Timers

Trigger input Reset input Setting Present value
Turns ON after set delay after the trigger input turns ON. The present value is held while the trigger input is OFF. Main Applications To continue operation after momentary power loss or power interruptions. Also can be used when delayed operation or a time lag is required.

Timer bit

4. Counter Operation
Counter direction specification input Counter input Reset input Set value Present value 0000 Counter bit
The counter bit turns ON when the counter value (present value) reaches the set value (present value set value). The counter returns to 0 and the counter bit turns OFF when the reset input turns ON. Count inputs are not accepted while the reset input is turned ON. The counter present value and counter bit (ON/OFF) are held even if the operating mode is changed or the power supply is interrupted.
5. 8-digit Counter Operation

Count speed H High speed

Counter direction specification input Counter input Reset input
The counter bit turns ON when the counter value (present value) reaches the set value (present value set value). The counter returns to 0 and the counter bit turns OFF when the reset input turns ON. Count inputs are not accepted while the reset input is turned ON. The counter present value and counter bit (ON/OFF) are held even if the operating mode is changed or the power supply is interrupted. High-speed Operation For CPU Units with DC power supply, high-speed operation is possible for input I0 only. (Maximum counting speed: 150 Hz)

Item Model AC inputs Input impedance Isolation Input common DC inputs Input voltage Input impedance Isolation ON voltage Input common 680 k No isolation Internally connected to power supply terminal 10.8 to 28.8 VDC 6.5 k ZEN-8E1DR: No isolation ZEN-8E1DT: Photocoupler 8 VDC min. 8E1 type Unit with 8 I/O Points 83 k Photocoupler Independent common terminal 20.4 to 26.4 VDC 4.7 k Photocoupler 16 VDC min. 4E/8E type Units with 4 input, 4 output, or 8 I/O points
ZEN-8E1DR: Internally connected to power supply Independent common terminal terminal ZEN-8E1DT: Independent common terminal 8 A per output Total for all outputs must be as follows: Units with 10 I/O Points: 20 A max. Units with 20 I/O Points: 40 A max. 28.8 V max. M3 (mounting holes on DIN Track hooks) V2 CPU Units (See note.) 56 mm No heat slits 8 A per output
Control output Relay outputs
Transistor outputs Mounting screws Connectable CPU Unit Dimensions (H W D) Case structure
26.4 V max. M4 (mounting holes on Unit) V1 or Pre-V1 CPU Units 56 mm Heat slits
Note: Refer to page 32 for details on compatible combinations of CPU Units and Expansion I/O Units.

Other Functions

Item Bits Timer operation Weekly timer operation Addition of bits Daylight Saving Time (DST) Setting Items set for password V2 Units ON-delay, OFF-delay, one-shot pulse, flushing pulse, twin timer operation Timer operation, multiple-day operation, pulseoutput operation 8-digit counter (1 counter, up to 150 Hz) 8-digit comparators (4 comparators) Manual, EU, US. Australia, New Zealand Ladder program editing Program all clear Ladder monitoring Password change/clear Backlight shut-off time Input filter settings Node number setting (See note.) Not possible Node number setting window deleted (except for Units with communications). Modem initialization window deleted (except for Units with communications). Models added with communications. ZEN-10C4@R-@-V2 Possible Node number setting window displayed. Modem initialization window displayed. V1 Units Pre-V1 Units ON-delay, OFF-delay, one-shot pulse, flushing pulse Timer operation --Manual, EU, US Ladder program editing Ladder monitoring Password change/clear Backlight shut-off time Input filter settings Node number setting
LCD contrast adjustment Menus Node number setting window Modem initialization window RS-485 communications Economy-type CPU Units
--Economy-type models added. ZEN-@C3@R-@-V2 Expansion I/O Units cannot be connected. Other functions are the same as the standard LCD models.
Note: Not displayed for V2 CPU Units except for Units with Communications.
Name V2 Units 10 I/O points Input bits Output bits Timers Holding timers Counters Weekly timers Calendar timers Display bits Work bits Holding bits Expansion input bits Expansion output bits Analog comparator bits Timer/counter comparator bits 8-digit counter I Q T # C * D H X Y A P F 6 points 16 points 8 points 16 points 16 points 16 points 16 points 12 points 12 points 4 points 16 points 1 point 4 points ----20 I/O points 12 points 6 points 4 points CPU Unit V1 Units 10 I/O points 20 I/O points 12 points 8 points Pre-V1 Units 10 I/O points 6 points 4 points 8 points 4 points 8 points 8 points 8 points 8 points

4 points (See note.) 8 points

@ 16 points

M 16 points
8-digit counter comparator bits G
Note: Output bit Q3 of Communications-type CPU Units cannot be output externally. It can be used as a work bit.
Compatible Combinations of CPU Units and Expansion I/O Units
The Expansion I/O Units that can be connected to V2 CPU Units are different from those that can be connected to V1 CPU Units and previous CPU Units. Expansion I/O Units with AC Inputs cannot be connected to V2 CPU Units with DC Power Supplies. Expansion I/O Units cannot be connected to Economy-type CPU Units. CPU Units Version V2 CPU Unit type Standard LCD type LED type Communications type Standard LCD type LED type Economy type V1 and Pre-V1 Standard LCD type LED type Power supply AC Model ZEN-@C1AR-A-V2 ZEN-@C2AR-A-V2 ZEN-10C4AR-A-V2 ZEN-@C1D@-D-V2 ZEN-@C2D@-D-V2 ZEN-@C3AR-A-V2 ZEN-@C3DR-D-V2 ZEN-@C1AR-A-V1 ZEN-@C1AR-A ZEN-@C2AR-A-V1 ZEN-@C2AR-A ZEN-@C1D@-D-V1 ZEN-@C1D@-D ZEN-@C2D@-D-V1 ZEN-@C2D@-D ZEN-4EA ZEN-4ED ZEN-4ER ZEN-8EAR ZEN-8EDR ZEN-8EDT Supported Expansion I/O Units ZEN-8E1AR ZEN-8E1DR ZEN-8E1DT ZEN-8E1DR ZEN-8E1DT Not supported.

DC AC DC AC

Memory Cassette and CPU Unit Combinations
Be aware of the following restrictions when using a Memory Cassette containing a program that was stored from a CPU Unit with a different version of system software.
System software version of CPU Unit used to write the Memory Cassette Ver. 1.0 Ver. 1.1 Ver. 2.0 (V1 CPU Units) Ver. 3.0 (V2 CPU Units) OK Restrictions (See note 1.) 10 I/O points Restrictions (See notes 1 and 2.) System software version of CPU Unit used to read the Memory Cassette Ver. 1.0 OK OK Restrictions (See note 2.) Ver. 1.1 OK OK OK Restrictions (See note 3.) Restrictions (See note 4.) Ver. 2.0 (V1 CPU Units) 10 I/O points 20 I/O points OK OK OK OK Restrictions (See note 4.) Restrictions (See note 4.) OK OK OK Restrictions (See note 3.) OK Restrictions (See note 3.) Ver. 3.0 (V2 CPU Units) 10 I/O points 20 I/O points OK OK OK OK OK OK
20 I/O points Restrictions Restrictions (See notes 1, 2, and 3.) (See notes 2 and 3.) Restrictions 10 I/O points Restrictions (See notes 1, 2, and 4.) (See notes 2 and 4.) 20 I/O points Restrictions (See notes 1 to 4.)
Restrictions Restrictions (See notes 2, 3, and 4.) (See note 4.)
Note: 1. The display functions (display clear: -CD@ and day/month display: DAT1) cannot be used and will be ignored. 2. Only the memory area ranges supported by the pre-V1 CPU Units can be used for Timers, Holding Timers, Counters, Weekly Timers, Calendar Timers, and Displays (i.e., only half of each). 3. Only 6 inputs and 4 outputs can be used in the CPU Unit I/O bits. Any others will be ignored. 4. Twin timer operation for timers, multiple-day operation and pulse operation for weekly timers, the 8-digit counter, and 8-digit comparators cannot be used. New Zealand and Australia cannot be set for Daylight Saving Time (DST).

!CAUTION

Electric shock, fire, or malfunction may occur. Do not disassemble, modify, or repair the ZEN or touch any of the internal parts. Electric shock may occur. Never touch the I/O terminals, computer connector, or Battery Unit connector while power is being supplied. Electric shock may occur. Do not remove the Expansion Unit connector cover unless an Expansion I/O Unit will be permanently installed. Fire may occasionally occur. Tighten the terminal screws to a torque of 0.565 to 0.6 Nm (5 to 5.3 in-lb).

Installation and Wiring

Do not allow the ZEN to fall during installation. Be sure that the DIN Track mounting levers, Memory Cassettes, Battery Units, cable connectors, and other items with locking devices are properly locked into place. Improper locking may result in malfunction. For surface mounting, tighten mounting screws to the following torque. CPU Units: 1.03 Nm max. Expansion I/O Units: 0.46 Nm max. Use wires with cross-sectional areas of 0.2 to 2.5 mm2 (equivalent to AWG24 to AWG14) for wiring and strip them for 6.5 mm.

Precautions for Safe Use

Please observe the following precautions for safe use of this product.

Circuit Design

All interface connectors and battery connectors are live parts. They may not be directly connected to a Safety Extra Low Voltage (SELV) circuit or to accessible conductive parts. For programming units and personal computers use only the connecting cable ZEN-CIF01 (optional accessory) manufactured by OMRON. ZEN-CIF01 provides safe (reinforced) insulation between personal computers and ZEN. Provide emergency stop circuits, external interlock circuits, limit circuits, and other safety circuits in addition to any provided within the ZEN control circuits to ensure safety of the overall system in the event of ZEN failure or external factors. If the ZEN discovers an error during self-diagnosis, operation will be stopped and all outputs will be turned OFF. As a countermeasure for such problems, external safety measures must be provided to ensure safety in the overall system. Outputs from the ZEN may remain ON or OFF due to faults in internal circuits such as output relay fusing or burning, or output transistor destruction. As a countermeasure for such problems, external safety measures must be provided to ensure safety in the overall system. Fail-safe measures must be taken by the user to ensure overall system safety in the event of broken signal lines or momentary power interruptions. The durability of the output relays is largely affected by the switching conditions. Confirm the operation of the system under actual operating conditions and set the switching frequency to ensure that adequate performance will be provided. Insulation faults and burning in the ZEN may result if relays are used after their performance has deteriorated.

Handling

The environment of use for the ZEN is "Pollution degree 2" and "Overvoltage category II" specified in IEC60664-1. Always use the ZEN within the rated ambient operating temperature and humidity. The rated ambient operating temperature is 0 to 55C (25 to 55C for LED-type CPU Units). If the ZEN is used near sources of heat, such as a power supply, the internal temperature of the ZEN may increase, lowering the durability of the ZEN. Discharge static electricity from your body, e.g., by touching a grounded metal plate, before touching any Unit. The exterior of the Units will be damaged if it comes into contact with organic solvents (e.g., benzene or paint thinner), strong alkalies, or strong acids. Never allow such substances to come into contact with the Units. Do not apply voltages exceeding the rated voltages. Internal elements may be destroyed. Short failures or open failures may result from the destruction of output elements. Do not use loads that exceed the rated output current.

Maintenance

When replacing a CPU Unit, transfer to the new Unit and confirm all settings for clock data, internal holding bits, holding timers, and counters before starting operation again.
Connecting Expansion I/O Units
Supply power to both the CPU Unit and Expansion I/O Units from the same power supply and turn them ON and OFF at the same time. When connecting Expansion I/O Units with DC inputs to a CPU Unit with an AC power supply, the burst noise immunity will be 1 kV (IEC 61000-4-4). Expansion I/O Units with AC inputs (ZEN-8E1AR) cannot be connected to a CPU Unit with a DC power supply.
Transportation and Storage
Use special packing boxes when transporting the ZEN and do not subject it to excessive shock or vibration or drop it during shipment. Store the ZEN within the rated ranges. If the ZEN has been stored at 10C or lower, allow it to stand at room temperature for three hours or longer before turning ON the power supply.
Precautions for Correct Use

Installation Environment

Do not install the ZEN in the following locations. Locations subject to radical changes in temperature Locations with high humidity subject to condensation Locations subject to excessive dust or dirt Locations subject to corrosive gas Locations subject to direct sunlight Do not install the ZEN in locations subject to shock or vibration. Extended use in such locations may cause damage from stress. In environments subject to static electricity (e.g., close to pipes conveying forming materials, powders, or fluid materials), separate the ZEN as far as possible from the source of static electricity. The ZEN is neither waterproof nor oil-proof. Do not use it in locations subject to water or oil. Use the ZEN within the allowable power supply voltage range. Be particularly careful in locations with bad power supply conditions, e.g., large fluctuations in the power supply voltage. Do not install the ZEN in locations subject to excessive noise, which may cause the ZEN to fail. Take appropriate and sufficient countermeasures when installing systems in the following locations: Locations subject to strong electromagnetic fields Locations subject to possible exposure to radioactivity