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Suspending the Communications Power Supply
S82J power supply
S82Y-jjN (Mounting Tool)
When using S82J power supply
DC power supply
Insulating material (such as
baked board or acrylic board)
When using other power supplies
2-4-4 Noise Prevention Wiring
To prevent inductive noise, do not wire the communications line, SYSMAC power lines, and other power
lines near to each other. Keep the power lines for Inverters, motors, regulators, and contactors, the
communications lines, and the SYSMAC power lines separated from each other by at least 300 mm.
Also, provide separate conduits or ducts for the communications lines and power lines.
Power line
Communications line
SYSMAC I/O Line
Suspended duct Floor duct
Control cable
SYSMAC Power Line
General control circuit line
Power cable
Power line
Shielding
Ground (100 Ω max.)
300 mm
max.
Low-voltage cable
Communications cable
300 mm
max.
Communications line
SYSMAC I/O Line
• Do not install communications lines and SYSMAC power lines onto the control panel on which high-
voltage devices are mounted.
• Because noise currents flow through metallic equipment (such as casings), the communications
cables should be placed as far away from metallic equipment as possible.
• Ground the shielding wire on the communications cable at one point.
• If the same ground is used for the communications cables and communications power supply, there is
a possibility that noise may be transmitted through the ground line to the communications line. In order
to avoid this, be sure that the power line ground and the grounds for the communications cables and
the communications power supply are located as far from each other as possible.
CompoBus/D Communications Line Design Chapter 2