ACS550-02/U2 User’s Manual 57
Installation
Connecting the shield wires at the control board
Single shielded cables:
Twist the grounding wires of the outer shield and connect
them to the grounding busbar below the X1 terminals.
Double shielded cables
: Connect the inner shields and the grounding wires of the
outer shield to the grounding busbar below the X1 terminals.
Do not connect shields of different cables to the same grounding clamp.
Leave the other end of the shield unconnected or ground it indirectly via a few
nanofarads high-frequency, high-voltage capacitor (e.g. 3.3 nF / 3000 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 the signal wire pairs twisted as close to the terminals as possible. Twisting the
wire with its return wire reduces disturbances caused by inductive coupling.
Securing the control cables mechanically
Fasten the control cables together and to the drive frame with cable ties as shown in
section Routing the control/signal cables inside the cubicle on page 53.
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