Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 222

Wiring Methods
External Wiring
186
IN
Diode
L
COM
Note Use surge suppressors and diodes with the following specifications.
Resistance: 50
Capacitor: 0.47 F
Voltage: 200 V
Breakdown voltage:
Mean rectification current: 1 A
Observe the following precautions for external wiring.
• When multi-conductor signal cable is being used, avoid combining I/O
wires and other control wires in the same cable.
• If wiring racks are parallel, allow at least 300 mm (12 inches) between the
racks.
PLC I/O wiring
PLC power supply and
general control circuit wiring
Power lines
If the I/O wiring and power cables must be placed in the same duct, they must
be shielded from each other using grounded steel sheet metal.
PLC power supply
and general
PLC I/O wiring control wiring
Ground to 100
Relay output
DC input
or triac output
Relay output or
transistor output
3 times load voltage min.
Low-current cables
Control cables
Power cables
Ground to 100 or less
Power lines Steel sheet metal
200 mm min.
or less
Section 5-4
L
OUT
Surge suppressor
COM
OUT
+
Diode
COM
300 mm min.
300 mm min.