Emotron VSB Instruction Manual Chapter 3 Installation and wiring
3.10 Instruction of Signal Switches
Fig. 3-15 Jumper diagram of signal switching
3.11 EMI Solutions
Due to its working principle, the drive will inevitably produce certain noise that may influence
and disturb other equipment. Moreover, since the internal weak electric signal of drive is also
susceptible to the interference of drive itself and other equipment, EMI problems shall be
inevitable. In order to reduce or avoid the interference of drive to external environment and
protect drive against interference from external environment, this section makes a brief
description of noise abatement, ground handling, leakage current suppression and the
application of power line filters.
3.11.1 Noise Abatement
When peripheral equipment and drive share the power supply of one system, noise from
drive may be transmitted to other equipment in this system via power lines and result in
misoperation and/or faults. In such a case, the following measures could be taken:
1) Mount input noise filter at input terminal of the drive;
2) Mount power supply filter at power input terminal of affected equipment;
3) Use isolation transformer to isolate the noise transmission path between other
equipment and the drive.
As the wiring of peripheral equipment and drive constitutes a circuit, the unavoidable
earthing leakage current of inverter will cause equipment misoperation and/or faults.
Designation Function
Default
setting
AI I: current input (0 - 20mA); V: voltage input (0 - 10V) 0 - 10V
AO I: current output (0 - 20mA); V: voltage output (0 - 10V) 0 - 10V
X
H means X terminal high input activated, while L low
activated
H
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