Omron CPM1A User Manual

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Pre-V1 Units
Ground to 100 Ω max.
AC power supply unit
L1
L2/N
0 CH
00 02
01
COM
100 to 240 VAC
Note Disconnect the functional earth terminal before conducting withstand voltage
test on pre-V1 Units.
Units with DC Power
Ground to 100 Ω max.
DC power supply unit
COM
00 02
01
0 CH
NC
24 VDC
+–
Note The NC terminal is not used.
Caution Disconnect the functional earth terminal when performing withstand voltage
tests. Not disconnecting the functional earth terminal may result in burning.
Crimp Connectors
Caution Always use crimp connectors for the CPM1A’s power lines and I/O lines or else
use a solid wire (instead of a stranded wire). Do not connect bare stranded wires
directly to terminals. Bare stranded wires connected directly to the terminal can
cause a fire.
Use M3 terminal screws and tighten the screws securely (0.5 N  m).
6.2 mm max. 6.2 mm max.
Fork terminal Ring terminal
The recommended wire size for solid wires is 0.4 to 1.2 mm (AWG26 to AWG18).
3-4-3 Power Supply Wiring
Wire a separate circuit for the CPM1A’s power supply circuit so that there isn’t a
voltage drop from the inrush current that flows when other equipment is turned
on.
When several CPM1A PCs are being used, it is recommended to wire the PCs
on separate circuits to prevent a voltage drop from the inrush current or incorrect
operation of the circuit breaker.
Use twisted power supply wires to prevent noise from the power supply lines.
Adding a 1:1 isolating transformer reduces electrical noise even further.
100- to 240-VAC Power
Supply
Wiring and Connections
Section 3-4

Omron CPM1A Specifications

General

Brand	Omron
Model	CPM1A
Category	Controller
Language	English