ABB ACS880-04F-504A-3, Руководство по оборудованию

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2. Ground the shields of the control cables at the clamp plate. Use torque 1.5 N·m
(13 lbf·in). The shields should be continuous as close to the terminals of the control
unit as possible. Only remove the outer jacket of the cable at the cable clamp so
that the clamp presses on the bare shield. The shield (especially in case of multiple
shields) can also be terminated with a lug and fastened with a screw at the clamp
plate. Leave the other end of the shield unconnected or ground it indirectly via a
few nanofarads high-frequency capacitor 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. Tighten the screws to secure
the connection.
3. Connect the conductors to the appropriate detachable terminals of the control
unit. See the
Default I/O diagram of the drive control unit (ZCU-1x) (page 103) . Use
shrink tubing or insulating tape to contain any strain strands.
Note: 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. Keep the shields continuous as close to the terminals of the control unit
as possible.
Installing the control panel holder back onto the external
control unit
Install the control panel holder back onto the control unit in reverse order to removing
it, see
Removing the control panel holder from the external control unit (page 90) .
Electrical installation 95
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