Connecting The Control Cables To The Rmio Board; Connecting The Shield Wires At Rmio Board; Securing The Control Cables Mechanically - ABB ACS800-U4 Hardware Manual

Connecting the control cables to the RMIO board

Connect the control cables as described below. Connect the conductors to the
appropriate detachable terminals of the RMIO board (refer to chapter
and I/O board

Connecting the shield wires at RMIO board

Strain relief
Double shielded cable
Single shielded cables: Twist the grounding wires of the outer shield and connect
them through the shortest possible route to the nearest grounding clamp. Double
shielded cables: Connect each pair cable shield (twisted grounding wires) with other
pair cable shields of the same cable and the grounding wires of the outer shield to
the nearest grounding clamp.
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

Use strain relief clamps as shown above. Fasten the control cables to the cabinet
frame.
(RMIO)). Tighten the screws to secure the connection.
Insulation
Strain relief
Single shielded cable
63
Motor control
Installation