ABB ACH580-31, Руководство по оборудованию

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4. Attach the cable conduits to the conduit plate. Make sure the conduit is
correctly bonded at both ends and that conductivity is consistent throughout
the conduit. Slide the control cables through the conduit. Cut to suitable length
(note the extra length of the grounding conductors) and strip the conductors.
5. Ground the outer shields of all control cables 360 degrees at a grounding
clamp.
6. Route the cable as shown in the figures below.
7. Secure the cables inside the drive mechanically.
8. Ground the pair-cable shields and grounding wire at the grounding terminal
(SCR) of the control unit.
9. Connect the conductors to the appropriate terminals of the control unit and
tighten to 0.5 … 0.6 N·m (0.4 lbf·ft). See Default I/O connection
diagram (page 137) .
Note:
• Leave the other ends of the control cable shields unconnected or ground them
indirectly through 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.
• 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.
Electrical installation – North America (NEC) 129