Cutler-Hammer D320 PLC, User Manual

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Chapter 4: Installation and Wiring
33
I/O Module Wiring
Digital Input Module Wiring
Check Points
• Refer to the instruction leaflet for the individual modules for specific limitations regarding the
particular type of input sensor used.
•
The input device connection methods are shown in the following graphics for the various
types of digital input devices.
DC Sensor
The following diagrams show the input device in connection with a DC sensor.
1. Relay Type
2. Sinking NPN Type
Module
Sensor
I
n
t
e
r
n
a
l
C
i
r
c
u
i
t
Input
Terminal
COM
Terminal
Power for
S
Input
P
Module Sensor
I
n
t
e
r
n
a
l
C
i
r
c
u
i
t
VCC
Sensor
Output
Input
Termina
l
COM
0
Input Power