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Measures to reduce influence
(1) Devices and signal cables vulnerable to noise should be installed away from the drive. The signal
cables should be shielded, with the shield layer grounded. Besides, the shielded cable shall be put
into a metal tube, and placed away from the drive and its input/output cables. If the signal cable
inevitably crosses the power cable, keep them orthogonal.
(2) Install the radio noise filter and linear noise filter (ferrite common mode choke) at the input and
output ends of the drive to suppress the radiation noise of the power cable.
(3) The motor cable shall be placed in a thick shelter, such as a thick pipe (more than 2 mm), or
buried into the cement trough. The power cable shall be put into a metal tube, and grounded using a
shielded cable (the motor cable uses a 4-core cable, with one end grounded at the drive side, and
the other end connected to the motor shell)
If the signal cables are laid in parallel with the power cables or bundled together with the power
cables, electromagnetic induction noise and static induction noise generated will transmit along the
signal cables to cause misoperation. Thus, such wiring should be avoided. Vulnerable devices should
be kept away from the drive, and vulnerable signal cables should be kept away from the
input/output cables of the drive. Besides, use shielded cables for signal and power, and put them into
metal tubes to create better isolation. The distance between the metal tubes shall be at least 20 cm.
4.3.2 Field wiring requirements
To avoid interference coupling, the control cable, power cable and motor cable should be installed separately and kept
away from each other, especially when the cables are parallel and extend for a long distance. If the signal cable
inevitably crosses the power cable, ensure it crosses perpendicularly.
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