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 61000-
4-4).
• 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
Pre-V1 CPU Units
The input circuit common terminal is connected
internally to the negative (−) side of the power
supply circuit.
COM wiring depends on whether a negative common or positive common is being used.
Positive (+) COM Wiring
Negative (−) COM Wiring
24 VDC
24 VDC
COM wiring required.
24 VDC
COM wiring required.
Analog inputs possible.
Analog inputs possible.
Input
devices
Input
devices
Input
devices
COM
+
−
COM
+
−
NC
+
−
CPU Unit with 10 I/O Points
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
CPU Units
Item
V2 Units
V1 Units
Pre-V1 Units
Rated power
Models with DC
10.8 to 28.8 VDC
20.4 to 26.4 VDC
supply voltage power supply
Power
Models with AC
See Ratings on page 7.
30 VA max.
(with 3 Expansion I/O Units connected)
consumption power supply
Models with DC
power supply
6.5 W max.
(with 3 Expansion I/O Units connected)
Inrush current Models with AC
power supply
Models with 10 I/O points: 4.5 A max.
Models with 20 I/O points: 4.5 A max.
40 A max.
Models with DC
power supply
Models with 10 I/O points: 30 A max.
Models with 20 I/O points: 30 A max.
20 A max.
DC inputs
I0 to I3
(See note 1.)
Input impedance 5.3 kΩ
5 kΩ
4.8 kΩ
ON voltage
8 VDC min.
16 VDC min.
Input common
Independent common terminal
Internally connected to
power supply terminal
Programmable Relay ZEN V2 Units
29
OMRON [ OMRON ELECTRONICS LLC ]
