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Routing the control cables inside the cabinet
Use the existing trunking in the cabinet where 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.
Obey these instructions:
•
Connect the inner twisted pair shields and all separate grounding wires to the
grounding clamps near the terminals.
•
Ground the outer shield of the cable at the cable entry, not at the grounding clamps
near the terminals.
•
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.
•
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 47
11
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