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MITSUBISHI CNC
Appendix 1. EMC Installation Guidelines
Appendix 1.5 Measures for Wiring in Panel
Cables act as antennas to propagate unnecessary noise, and thus must be appropriately shielded and
treated. The following measures must be sufficiently considered for the cables that carry out high-speed
communication.
Appendix 1.5.1 Precautions for Wiring in Panel
(1) If the cables are led unnecessary in the panel, they will pick up noise. Pay attention to the device layout
and wire length so that the wiring length is as short as possible.
Device Device
(2) Always connect the grounding wire to the FG terminal indicated on the device.
(3) Keep the distance between the drive line and detector cable to the drive section motor as far apart as
possible when wiring.
(4) Do not lead the power supply wire around the panel without using a filter.
Conductive
noise
Appendix 1.5.2 Shield Treatment of Cables
Use shielded cables for the cables wired outside the panel.
Use a shield clamp within 10cm of the lead-out port from the panel. (Refer to "EMC Countermeasure Parts :
Shield Clamp Fitting".)
(1) Ethernet cable
GOT
(Note) Ferrite cores are not required when wiring is done within the panel.
88
Device
Noise
Device
Radiated
noise
Flow out
Partition
AC input
NF
plate
Noise
filter
Shield clamp
Ethernet cable
Ferrite core
Device Device Device
•
Use a shield clamp within
10cm from the panel's inlet/
outlet.
•
Install a ferrite core on both
ends of the connected units.
Q173NCCPU
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