Noise Filter (Power Supply Line Filter) - Mitsubishi MELSEC Q4ARCPU User Manual

3.1.7 Noise filter (power supply line filter)

A noise filter is effective for suppressing conduction noise. For stand-alone
systems (redundant power supply) and redundant CPU systems of the Q4ARCPU,
noise filters must be installed on the power supply line. For stand-alone systems
(single power supply) of the Q4ARCPU, noise filters are not necessarily installed
on the power supply line except for the A61PEU, A62PEU, and A63P, while
installing noise filters can reduce more noises. (A noise filter is effective for
suppressing conductive noise in the band of approximately 10MHz or less.). Use
any of the following noise filters (double type filters) or equivalent.
Model name
Manufacturer SCHAFFNER
Rated current
Rated voltage
The precautions when attaching a noise filter are described below.
(1) Do not install the input and output cables of the noise filter together to
prevent the input noise inducting into the output cable.
Filter
(a) Installing the input and output
cables together will cause
noise induction.
(2) Connect the noise filter's ground terminal to the control panel with the
shortest cable as possible (approx. 10cm (3.94 in.) or less.)
FN343-3/01 FN660-6/06
SCHAFFNER
3A
Input side
(power supply side)
Induction
Output side
(device side)
ZHC2203-11
TDK
6A 3A
250V
Input side
(power supply side)
(b) Separate the input cable from
the output cable.
13
MBW1205
Nemic Lambda
5A
Induction
Filter
Output side
(device side)