ABB ACS880-07C, Hardware Manual

Page: 59 / 188

Guidelines for planning the electrical installation 59
Planning the braking system
See chapter Resistor braking .
Selecting the control cables

Shielding
All control cables must be shielded.
Use a double-shielded twisted pair cable for analog signals. This type of cable is
recommended for the pulse encoder signals also. Employ one individually shielded pair for
each signal. Do not use common return for different analog signals.
A double-shielded cable (figure a below) is the best alternative for low-voltage digital
signals but single-shielded (b) twisted pair cable is also acceptable.

Signals in separate cables
Run analog and digital signals in separate, shielded cables. Never mix 24 V DC and 230 V
AC signals in the same cable.

Signals allowed to be run in the same cable
Relay-controlled signals, providing their voltage does not exceed 48 V, can be run in the
same cables as digital input signals. The relay-controlled signals should be run as twisted
pairs.

Relay cable type
The cable type with braided metallic screen (for example ÖLFLEX by LAPPKABEL,
Germany) has been tested and approved by ABB.

Control panel cable length and type
In remote use, the cable connecting the control panel to the drive must not be longer than
three meters (10 ft). Cable type: shielded CAT 5e or better Ethernet patch cable with RJ-45
ends.
Routing the cables
Route the motor cable away from other cable routes. Motor cables of several drives can be
run in parallel installed next to each other. The motor cable, input power cable and control
cables should be installed on separate trays. Avoid long parallel runs of motor cables with
1 Insulation jacket
2 Copper wire screen
3 Helix of copper tape or copper wire
4 Inner insulation
5 Cable core
a b