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Unit Versions of CS/CJ-series Serial Communications Boards/Units 7
Recommended Ferrite Cores
The following ferrite core (data line noise filter) is recommended:
0443-164151 by Fair-Rite Products Corp.
Low impedance, 25 MHz: 90
Ω, 100 MHz: 160 Ω
Recommended Mounting Method
Mount the core on one turn of the communications cable, as shown in the fol-
lowing illustration.
Mount the cores as lost to the end of the communications cable as possible,
as shown in the following illustration.
6-5 EMS Measures for Serial Communications Units
The immunity testing conditions for the CJ1W-SCU41-V1 Serial Communica-
tions Unit are as follows: A ferrite core is mounted on the test cable connected
to the RS-422A/485 port.
Refer to 6-4 EMI Measures for Serial Communications Boards and Units for
information on mounting the ferrite core.
7 Unit Versions of CS/CJ-series Serial Communications
Boards/Units
Unit Versions
A “unit version” has been introduced to manage CS/CJ-series Serial Commu-
nications Units/Boards according to differences in functionality accompanying
upgrades.
1. Unit Version Notation on Products
The unit version code is provided on the nameplate of the CS-series Serial
Communications Boards and Units for which unit versions are being man-
aged, as shown below for the Loop Control Board. This system applies to
Serial Communications Units or Boards with unit version 1.2 or later.
• Serial Communications Boards
Serial
Commu-
nications
Unit/Board
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