2
x
Avoid passing the serial cable near power cables; provide separate conduits for power and
communication cables; furthermore, it is advisable to keep the cable away from devices that
generate magnetic or electromagnetic fields, such as radio antennas, transformers, contactors, neon
lights, etc.;
x
Strictly respect the polarity of the + and - wires. Use the same colour for polarity; for example white
wire for "+" and black for "-". The sheath must always only be connected to the dedicated terminal
(usually called "GND" and near the "+" and "-" terminals). The two terminals must be connected to the
GND terminal, that of the incoming cable and that of the outgoing cable;
x
Avoid unsheathing the serial cable for an excessive length, as shown:
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