Mitsubishi Electric MELSEC LJ72GF15-T2-U-HW Safety Manuallines page 50

[Wiring example when using a duct (Example of a problem and
its solution)]
Relay
Drive Drive
unit unit
Control
panel
Noise source
(Power system,
etc.)
Relay
Control
panel
Noise source
(Power system,
etc.)
(f) I/O signal lines and other communication cables
For the following cables, if pulled out of the control panel,
always ground the shield section of these lines and cables in
the same manner described in (a).
• I/O signal lines (including a common line)
Relay
Relay
Programmable
controller
Modified
Relay
Relay
Programmable
controller
Drive Drive
unit unit
49
Wiring duct
The drive units are placed
near the noise source. The
connection cable between
the programmable controller
and drive units is too long.
Wiring duct
The programmable
controller and drive
units are placed closely.
The connection cable
between them is located
separately from the power
line, and is as short as
possible. (In this example,
the cables are connected
without using the duct.)