Mitsubishi Electric FR-F800 Series Instruction Manual page 95

Noise propagation
path
(a), (b), (c)
(d), (e), (f)
(g)
(h)
 Data line filter
Data line filter is effective as an EMI countermeasure. Provide a data line filter for the detector cable, etc.
• Commercially available data line filter: ZCAT3035-1330 (by TDK), ESD-SR-250 (by TOKIN)
• Specification example (ZCAT3035-1330 by TDK)
Item
Impedance (Ω)
Outline dimension drawings
(mm)
The impedance values above are reference values, and not guaranteed values.
94
3. PRECAUTIONS FOR USE OF THE INVERTER
3.1 Electro-magnetic interference (EMI) and leakage currents
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When devices that handle low-level signals and are liable to malfunction due to electromagnetic noises, e.g.
instruments, receivers and sensors, are contained in the enclosure that contains the inverter or when their signal
cables are run near the inverter, the devices may malfunction due to by air-propagated electromagnetic noises. The
following countermeasures must be taken:
• Install easily affected devices as far away as possible from the inverter.
• Run easily affected signal cables as far away as possible from the inverter and its I/O cables.
• Do not run the signal cables and power cables (inverter I/O cables) in parallel with each other and do not bundle
them.
• Set the EMC filter ON/OFF connector of the inverter to the ON position. (Refer to
• Inserting a line noise filter into the output suppresses the radiated noise from the cables.
• Use shielded cables as signal cables and power cables and run them in individual metal conduits to produce further
effects.
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 to cause malfunction of the devices and the following countermeasures must
be taken:
• Install easily affected devices as far away as possible from the inverter.
• Run easily affected signal cables as far away as possible from the inverter and its I/O cables.
• Do not run the signal cables and power cables (inverter I/O cables) in parallel with each other and do not bundle
them.
• Use shielded cables as signal cables and power cables and run them in individual metal conduits to produce further
effects.
When the peripheral devices use the power system of the inverter, its generated noises may flow back through the
power supply cables to cause malfunction of the devices and the following countermeasures must be taken:
• Set the EMC filter ON/OFF connector of the inverter to the ON position. (Refer to
• Install the line noise filter (FR-BLF/FR-BSF01) to the power cables (output cables) of the inverter.
When a closed loop circuit is formed by connecting the peripheral device wiring to the inverter, leakage currents may
flow through the earthing (grounding) cable of the inverter to cause the device to malfunction. In that case,
disconnecting the earthing (grounding) cable from the device may stop the malfunction of the device.
10 to 100 MHz
100 to 500 MHz
39 1
34 1
TDK
Product name Lot number
search engine
Countermeasure
Description
80
150
Cable fixing band
mount
page 95.)
page 95.)