ABB ACS180, Руководство по оборудованию, Страница: 49 / 168

requirement of the motor cable shield of the drive is shown below. It consists of
a concentric layer of copper wires with an open helix of copper tape or copper
wire. The better and tighter the shield, the lower the emission level and bearing
currents.
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1 3 4 5 2
Insulation jacket 1
Helix of copper tape or copper wire 2
Copper wire shield 3
Inner insulation 4
Cable core 5
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.
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„
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a b
￭
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.
Guidelines for planning the electrical installation 49