A-4-4 Reducing Electrical Noise For External Wiring - Omron CP1E Series User Manual

A-4-4 Reducing Electrical Noise for External Wiring
Observe the following precautions when wiring communications cables.
• 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 between them.
Communications
cables
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.
Communications
cables
CP1E CPU Unit Hardware User's Manual(W479)
Low-current cables
Control cables
Power cables
Ground to 100 Ω or less.
PLC power supply
and general control
Power lines
circuit wiring
Ground to 100 Ω or less.
300 mm min.
300 mm min.
Steel sheet metal
200 mm min.
Appendices
A-41