Wiring Cpu Units With Dc Power Supplies - Omron ZEN Operation Manual

Wiring
2-2-5

Wiring CPU Units with DC Power Supplies

Power Supply and Input Circuits
■
12 to 24 VDC
12 to 24 VDC
44
25 V or less (i.e., the OFF voltage for the ZEN) is 5 mA, as shown
in the residual voltage characteristic graph.
From the formulas given above,
R1 ≤ 25 V AC/1.7 mA= 14.7 kΩ
R2 ≤ 85 V AC/5 mA = 17 kΩ
The bleeder resistor must thus be 14 kΩ.
The Sensor output current in this case would be 100 VAC/14 kΩ,
or 7 mA. This satisfies the Sensor's control output range of 5 to
300 mA.
The bleeder resistor capacity is calculated as shown below and
must be 3 W.
P ≥ (110 V AC
CPU Units with 10 I/O Points
Connecting a Negative Common (PNP Connection)
COM
CPU Unit with
10 I/O points
Connecting Analog Input Devices to Input Terminals I4 and I5
COM
I0 I1 I 2 I 3
CPU Unit with
10 I/O points
2
)/14 kΩ × 3 = 2.59 W
Input device
Note: When connecting an analog
I 4 I 5
Section 2-2
input device, always connect
the negative side to the COM
terminal.