IMO HD2 IP Series Instruction Manual page 344

HD2 IP55 High-ingress Protection Series Inverter
separate shielded twisted pair for each signal. Do not use the same ground wire for different
analog signals.
Figure D-2 Power cable arrangement
For low-voltage digital signals, double-shielded cables are recommended, but shielded or
unshielded twisted pairs as shown in figure can be used. For frequency signals, however,
only shielded cables can be used.
Relay cables need to be those with metal braided shield layers.
Keypads need to be connected by using network cables. In complicated electromagnetic
environments, shielded network cables are recommended.
Note: Analog signals and digital signals cannot use the same cables, and their cables must be
arranged separately.
Do not perform any voltage endurance or insulation resistance tests, such as high-voltage
insulation tests or using a megameter to measure the insulation resistance, on the inverter or
its components. Insulation and voltage endurance tests have been performed between the
main circuit and chassis of each inverter before delivery. In addition, voltage limiting circuits
that can automatically cut off the test voltage are configured inside the inverters.
Note: Check the insulation conditions of the input power cable of an inverter according to the
local regulations before connecting it.
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