Power Supply Wiring - Omron CPM1A Operation Manual

Wiring and Connections
Units with DC Power
Caution
!
Crimp Connectors
Caution
!

3-4-3 Power Supply Wiring

100- to 240-VAC Power
Supply
52
Pre-V1 Units
Ground to 100 Ω max.
AC power supply unit
Note Disconnect the functional earth terminal before conducting withstand voltage
test on pre-V1 Units.
Ground to 100 Ω max.
DC power supply unit
Note The NC terminal is not used.
Disconnect the functional earth terminal when performing withstand voltage
tests. Not disconnecting the functional earth terminal may result in burning.
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 S m).
6.2 mm max.
The recommended wire size for solid wires is 0.4 to 1.2 mm (AWG26 to AWG18).
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.
L1 L2/N
100 to 240 VAC
+ –
24 VDC
NC
Fork terminal
6.2 mm max.
Section 3-4
01
COM
00 02
0 CH
COM
01
00 02
0 CH
Ring terminal