Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 180

• When a duct is used (problematic example and modification example)
Relay
Drive Drive
unit unit
Noise generating
device
(e.g. power system)
Relay
Noise generating
device
(e.g. power system)
Shaded part: Wiring duct
External power supply
Use a reinforced or double insulated CE-marked external power supply, and ground the FG terminal. Ground the FG
terminals.
• External power supply used for the tests conducted by Mitsubishi: PS5R-SF24 manufactured by IDEC Corporation
APPX
178
Appendix 6 EMC and Low Voltage Directives
Relay
Relay
Programmable
controller
Relay
Relay
Programmable
controller
Drive Drive
unit unit
• Problematic example
The drive units are placed near the noise source. The
connection cables between the programmable controller
and drive units are too long.
• Modification example
The programmable controller and drive units are placed
closely. The connected cables between them are placed
separately from the power line and the shortest. (In this
example, the cables are connected without using the
duct.)