Mitsubishi Electric FR-E540-0.4K-EC Instruction Manual page 48

Noise Path
When devices which handle low-level signals and are susceptible to
misoperation due to noise (such as instruments, receivers and sensors)
are installed near the inverter and their signal cables are contained in the
same panel as the inverter or are run near the inverter, the devices may
be misoperated by air-propagated noise and the following measures must
be taken:
(1) Install easily affected devices as far away as possible from the
1), 2), 3)
(2) Run easily affected signal cables as far away as possible from the
(3) Do not run the signal cables and power cables (inverter I/O cables) in
(4) Insert line noise filters onto I/O and radio noise filters into inputs to
(5) Use shielded cables for signal cables and power cables and run them
When the signal cables are run in parallel with or bundled with the power
cables, magnetic and static induction noises may be propagated to the
signal cables causing misoperation of the devices and the following
measures must be taken:
(1) Install easily affected devices as far away as possible from the
4), 5), 6)
(2) Run easily affected signal cables as far away as possible from the
(3) Do not run the signal cables and power cables (inverter I/O cables) in
(4) Use shielded cables for signal cables and power cables and run them
When the power supplies of the peripheral devices are connected to the
power supply of the inverter within the same line, inverter-generated noise
may flow back through the power supply cables causing misoperation of
the devices and the following measures must be taken:
7)
(1) Install the radio noise filter (FR-BIF) to the power cables (input cables)
(2) Install the line noise filter (FR-BLF, FR-BSF01) to the power cables
When a closed loop circuit is formed by connecting the peripheral device
wiring to the inverter, leakage current may flow through the ground cable
8) of the inverter causing misoperation of the device. In such a case,
disconnection of the ground cable of the device may cause the device to
operate properly.
inverter.
inverter.
parallel with each other and do not bundle them.
suppress cable-radiated noises.
in individual metal conduits to further reduce effects.
inverter.
inverter.
parallel with each other and do not bundle them.
in individual metal conduits to further reduce effects.
of the inverter.
(I/O cables) of the inverter.
INSTALLATION AND WIRING
Measures
35