Insulation jacket1
Helix of copper tape or copper wire2
Copper wire shield3
Inner insulation4
Cable core5
Planning the resistor braking system
See chapter Resistor braking (page 261)
Selecting the control cables
￭ Shielding
Only use shielded control cables.
Use a double-shielded twisted pair cable for analog signals. This type of cable is
recommended for the pulse encoder signals also. Use one individually shielded pair for
each signal. Do not use common return for different analog signals.
A double-shielded cable (a) 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. Do not mix 24 V DC and
115/230 V AC signals in the same cable.
￭ Signals that can be run in the same cable
If their voltage does not exceed 48 V, relay-controlled signals can be run in the same cables
as digital input signals. The relay-controlled signals should be run as twisted pairs.
￭ Relay cable
The cable type with braided metallic shield (for example ÖLFLEX by LAPPKABEL, Germany)
has been tested and approved by ABB.
96 Guidelines for planning the electrical installation
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