Mitsubishi Electric MELSEC L Series User Manual page 145

[When a duct is used (problematic example and modification example)]
Control
panel
Control
panel
(f) I/O signal cables and other communication cables
As for the following, ground the shield of the cable (in the same way as explained in (a)) when it is extended out
of the control panel.
(g) Power cables for external power supply terminal
Use a reinforced or double insulated CE-marked external power supply for the following modules. Install an
AC/DC power supply and a module inside the same control panel. Keep the length of the power cable
connected to the external power supply terminal to 30m or less.
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Relay
Drive Drive
unit unit
Noise source
(Power system,
etc.)
Relay
Noise source
(Power system,
etc.)
• I/O signal cable (including common cable)
• Analog-digital converter module
• Digital-analog converter module
• Analog input/output module
• High-speed counter module
• Positioning module
• Temperature control module
• Flexible high-speed I/O control module
search engine
Relay
Relay
Programmable
controller
Modified
Relay
Relay
Programmable
controller
Drive Drive
unit unit
APPENDICES
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.)
A
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