Omron SYSMAC C20K Installation Manual page 32

I/O Wiring
CPU C20P, C28P, C40P
(CD_–D)
Power
supply
Relay contact outputs
(24 VDC)
Transistor outputs
M3.5 screws
7.5 max.
7.5 max.
High–
speed
counter
Inputs (24 VDC)
input
A separate power supply must be used for the DC inputs.
Load Load Load
power power power
Ground
supply supply supply
NC NC
Hardware
reset input
Not in C20K
Load Load
power power
supply supply
Not in C20K or C28K
Not in C20K
NC: Do not connect the NC terminals to anything.
Section 2–6
Not in C20K or C28K
Load Load
power power
supply supply
NC NC
COM +
24 VDC
25