ABB ACS880-37LC, Hardware Manual

Page: 83 / 202

Routing the control cables inside the cabinet
Use the existing trunking in the cabinet wherever possible. Use sleeving if cables are laid
against sharp edges. When running cables to or from a swing-out frame, leave enough
slack at the hinge to allow the frame to open fully.
Connecting control cabling
Connect the conductors to the appropriate terminals. Refer to the wiring diagrams delivered
with the drive.
Connect the inner twisted pair shields and all separate grounding wires to the grounding
clamps closest to the terminals.
The drawing below represents the grounding of the control cabling when connecting to a
terminal block inside the cabinet. The grounding is done in the same way when connecting
directly to a component such as the control unit.
Notes:
• Do not ground the outer shield of the cable here since it is grounded at the lead-through.
• Keep any signal wire pairs twisted as close to the terminals as possible. Twisting the
wire with its return wire reduces disturbances caused by inductive coupling.
100 Electrical installation
At the other end of the cable, leave the shields unconnected or ground them indirectly via
a high-frequency capacitor with a few nanofarads, eg. 3.3 nF / 630 V. The shield can also
be grounded directly at both ends if they are in the same ground line with no significant
voltage drop between the end points.
Electrical installation 83
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