ABB S800 I/O User Manual page 52

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For use in a typical industrial environment according to the basic protection:
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Unshielded lines are adequate for binary signals and high level (0...20mA,
±10V...) analog signals.
Shielded cables should be used for low level (RTDs, TC...) analog signals and
pulse transducer signals.
Minimize the loop area formed between the cable and earth (environment
ground), for example by laying the cable on metallic trays that are earthed at
several points. Closed cable conduits provide an additional attenuation of up to
30 dB.
Use separate cables for analog, binary and heavy current lines. Lay the cables
separately sorted according to type. The signal cables and heavy current cables
should be in separate conduits or at least 30cm apart from each other.
The return-conductor should be in the same cable as the signal.
The field cables must be wired according to the recommendations of
Figure 2-16.
Advant Fieldbus cable installed per the
PROFIBUS-DP cable installed according to PROFIBUS.
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3BSE 020 923R101
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