Fuji Electric PXG-9 Communication Instruction Manual page 14

When using the micro controller in an area where the imposed noise level is expected to exceed 1000V, we recommend using
•
a noise filter on the master side as seen in the figure below.
[Noise filter] (recommended): ZRAC2203-11 (made by TDK Corporation)
Programmable controller
Personal computer
+ RS-232C to RS-485 converter
Chapter
3
PXG Series
If there are problems with EMC during communication, the noise level can be reduced by using a communication cable with a
•
ferrite core.
Ferrite core (recommended): ZCAT series (made by TDK Corporation)
or
Noise filter
MSFC series (made by Morimiya Electric Co., Ltd.)
RS-485
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