ABB ACS 160 User Manual page 132

Control Cables
Control cables must be multi-core cables with a braided copper wire screen.
The screen must be twisted together into a bundle not longer than five times its width and
connected to terminal X1:1 (digital and analogue I/O).
Route the control cables as far away as possible from the mains and motor cables (at least 20 cm).
Where control cables must cross power cables make sure they are at an angle as near 90 degrees
as possible. Also the cable routing must be done so that the distance from the sides of the
converter is at least 20 cm to avoid excessive radiation to the cable.
A double shielded twisted pair cable is recommended for the analogue signals. Employ one
individually shielded pair for each signal. Do not use common return for different analogue signals.
A double shielded cable is the best alternative for low voltage digital signals but single shielded
twisted multipair cable is also usable (see Figure 35).
Figure 35 A double shielded twisted pair cable on the left and a single shielded twisted multipair
cable on the right.
The analogue and digital input signals should be run in separate, screened cables.
Relay-controlled signals, providing their voltage does not exceed 48 V, can be run in the same
cables as digital input signals. It is recommended that the relay-controlled signals be run as twisted
pairs.
Never mix 24 VDC and 115/230 VAC signals in the same cable.
Note! When the overriding control equipment and the ACS 160 are installed inside the same
cabinet, these recommendations might be overly cautious. If the customer plans to test the entire
installation, there is an opportunity to save some costs by relaxing these recommendations, for
example by using unshielded cable for the digital inputs. But the customer must verify this.
Control Panel Cable
When mounting control panel far away from the converter use CA-PAN-L
Route the control panel cable as far away as possible from the mains and motor cables (at least
20 cm). Also the cable routing must be done so that the distance from the sides of the converter is
at least 20 cm (8 in) to avoid excessive radiation to the cable.
122 ACS 160 User's Manual