Built-In Emc Filter - Mitsubishi Electric FR-CC2-H315K Instruction Manual

Noise propagation
path
When a closed loop circuit is formed by connecting the peripheral device wiring to the inverter or the converter unit,
leakage currents may flow through the earthing (grounding) cable of the inverter or the converter unit to cause the
(h)
device to malfunction. In that case, disconnecting the earthing (grounding) cable from the device may stop the
malfunction of the device.
 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 manufactured by TDK)
Item
Impedance (Ω)
Outline dimension drawings
(mm)
The impedance values above are reference values, and not guaranteed values.
 EMI measure example
Inverter
power
supply
Separate inverter, converter
unit, and power line by more
than 30 cm from sensor circuit.
(at least 10 cm)
Control
power
supply
NOTE
• For compliance with the EU EMC Directive, refer to
3.1.3

Built-in EMC filter

The converter unit (FR-CC2) is equipped with a built-in EMC filter (capacitive filter).
These filters are effective in reducing air-propagated noise on the input side of the converter unit.
Two EMC filter ON/OFF connectors are provided. Both connectors are initially set to the "disabled" (OFF) position.
62
3. PRECAUTIONS FOR USE OF THE CONVERTER UNIT
3.1 Electro-magnetic interference (EMI) and leakage currents
10 to 100 MHz 80
100 to 500 MHz 150
39 1
34 1
TDK
Product name Lot number
Enclosure
EMC Converter
filter unit
Do not earth (ground) enclosure directly.
Do not earth (ground) control cable.
Countermeasure
Description
Cable fixing band
mount
Decrease carrier frequency
Line noise
Inverter
filter
Power
supply for
sensor
Do not earth (ground) shield but
connect it to signal common cable.
page 184.
Install the line noise filter
on inverter output side.
M Motor
Use 4-core cable for motor
power cable and use one
cable as earth (ground) cable.
Use a twisted pair shielded cable
Sensor