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Noise Filter (power Supply Line Filter) - Mitsubishi Electric MELSEC A Series User Manual

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3.1.6 Noise filter (power supply line filter)

The noise filter (power supply line filter) is a device effective to reduce conducted
noise. Except some particular models described in Section 9.1.3 (5), installation of a
noise filter onto the power supply lines is not necessary. However conducted noise
can be reduced if it is installed. (The noise filter is generally effective for reducing
conducted noise in the band of 10 M Hz or less.) Usage of the following filters is
recommended.
Model name
Manufacturer
Rated current
Rated voltage
The precautions required when installing a noise filter are described below.
(1) Do not bundle the wires on the input side and output side of the noise filter.
When bundled, the output side noise will be induced into the input side wires
from which the noise was filtered.
(power supply side)
Filter
(a) The noise will be included when the
input and output wires are bundled.
(2) Earth the noise filter earthing terminal to the control cabinet with the
shortest wire possible (approx. 10cm (3.94in.)).
FN343-3/01
SCHAFFNER
3A
Input side
Induction
Output side
(device side)
FN660-6/06
SCHAFFNER
6A
250V
Input side
(power supply side)
Filter
(b) Separate and lay the inputand output
wires.
17
ZHC2203-11
TDK
3A
Output side
(device side)

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