ZEN V2 Units
14
CPU Units with 20 I/O Points
For Connections to a Negative Common (PNP Connection)
For Connecting Analog Input Devices to Input Terminals Ia and Ib
For Connections to Positive (+) Common (NPN Connection)
Note: When connected to the positive (+) common, Ia and Ib cannot be used as analog inputs.
Expansion I/O Units
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
For Connections to Positive (+) Common
COM
I5 I6NC I7 I8 I9 Ia IbI0 I1 I2 I3 I4
CPU Unit with 20 I/O points
Input device
12 to 24 VDC
CPU Unit with 20 I/O points
12 to 24 VDC
COM
I5 I6NC I7 I8 I9 Ia IbI0 I1 I2 I3 I4
Note: When connecting an analog input device, always connect the negative side to the COM terminal.
+ −
COM I5 I6NC I7 I8 I9 Ia IbI0 I1 I2 I3 I4
12 to 24 VDC
CPU Units with 20 I/O points
Input device
+ −
COM I5I0
I1
I2 I3 I4
±
COM IN0 IN1 IN2 IN3 COMNC IN0 IN1 IN2 IN3
12 to 24 VDC
CPU Unit with 10 I/O points
ZEN-8E1DR
Expansion I/O Unit
(DC input, relay output)
ZEN-8E1DT
Expansion I/O Unit
(DC input, transistor output)
Input
device
Input
device
+ −
COM I5I0
I1
I2 I3 I4
±
COM IN0 IN1 IN2 IN3 COMNC IN0 IN1 IN2 IN3
12 to 24 VDC
CPU Unit with 10 I/O points
ZEN-8E1DR
Expansion I/O Unit
(DC input, relay output)
ZEN-8E1DT
Expansion I/O Unit
(DC input, transistor output)
Input
device
Input
device
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