Mitsubishi MELSEC L Series User Manual page 392

[Wiring example when using a duct (problematic example and modification example)]
Drive
unit
Control
panel
Noise source
(Power system,
etc.)
Control
panel
Noise source
(Power system,
etc.)
390
Relay
Drive
unit
Relay
Relay
Relay
Programmable
controller
Modified
Relay
Relay
Programmable
controller
Drive Drive
unit unit
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.)