Noise Countermeasures For External Wiring - Omron CJ2 CPU UNIT User Manual

Cj2 cpu unit hardware
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Appendices

Noise Countermeasures for External Wiring

Take the following points into account when externally wiring communications cables.
• When multi-conductor signal cable is being used, do not combine 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
SYSMAC power supply
lines and general
control circuit lines
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 plates.
Communications
cables
A-138
Low-power cables
Control cables
Power cables
Ground to less than 100 Ω
SYSMAC power supply
lines and general control
circuit lines
Power lines Steel sheet metal plates
Ground to less than 100 Ω
300 mm min.
300 mm min.
200 mm min.
CJ2 CPU Unit Hardware User's Manual

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