ABB ACS55 Serie Guia Del Usuario página 18

EN 19
Additional cabling and EMC instructions
Follow these instructions for trouble free operation and to ensure compatibility with the European EMC directive.
Motor cable
The motor cable must be a symmetrical three conductor cable with a concentric PE conductor or a four conductor cable with a
concentric shield. Braided metallic screen is recommended, e.g. type MCCMK (NK Cables).
- Twist the cable screen wires together into a bundle, and connect to the earthing terminal . Keep the bundle as short as possible.
- Clamp the cable screen as shown in the figure when internal or external EMC filter is used.
- At the motor end the motor cable screens must be earthed 360 degrees with an EMC cable gland or the screen wires must be twisted
together into a bundle not longer than 5 times its width and connected to the PE terminal of the motor.
Control cables
Control cables must be multi-core cables with a braided copper wire screen.
A double shielded twisted pair cable is recommended for the analogue
signals.
- Twist the screen together into a bundle and connect to terminal SCR. Keep
the bundle as short as possible.
- Clamp the control cable as shown in the figure (EMC units only).
- Route the motor cable away from the control wires and the power supply
cable to avoid electromagnetic interference (distance > 20 cm).
Note: Never mix 24 VDC and 115/230 VAC signals in the same cable.
control cable clamps
motor cable
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