Omron ZEN Operation Manual page 64

Wiring
Precaution
1. Do not connect the + and - DC power supply in reverse on CPU
Units with DC power supplies.
2. With V1 CPU Units, both PNP and NPN sensors can be connect-
ed to DC input circuits.
Connecting PNP Sensors
+ (power supply)
PNP
output
Connecting NPN Sensors
NPN
output
−
+
I0 to I3
4.1 kΩ
(I0 to I9)
− (COM)
I0 to I3
750 Ω
4.1 kΩ
(I0 to I9)
(COM)
Section 2-2
750 Ω
Internal
circuits
Internal
circuits
41