2. CONNECTING
IMSRM04-E8
8
2.1.2 When using operation panel
The communication interface for operation panel are RS-232C, RS-422A and RS-485. When using
the RS-422A or RS-485, a maximum of 16 control units (OPC/OPC-H: 32 control units) can be
connected.
However, when connecting to the computer which only has a RS-232C driver, conversion of the
communication interface will be necessary.
RS-232C (Only one unit may be connected)
RS-422A
RS-422A
RS-422A
RS-422A
RS-422A
or
RS-485
RS-422A
or
RS-485
RS-422A
or
RS-485
RS-422A or
RS-485
RS-232C
RS-422A
or
RS-485
RS-422A
RS-422A
Maximum of 16 units
Control unit
Control unit
Control unit
Control unit
Operation panel
Operation panel
Operation panel
Operation panel
Maximum of 8 units
Maximum of 8 units
Maximum of 8 units
Maximum of 8 units
RS-232C/RS-422A or
RS-232C/RS-485
converter
Host computer
Junction branch box
Junction branch box
Our recommended RS-232C/RS-422A or RS-232C/RS-485 converter and junction branch
boxes are shown below:
Converter: COM-A (RS-232C/RS-422A), COM-B (RS-232C/RS-485)
Junction branch box: BRA-100B-4 (RS-422A), BRA-100B-2 (RS-485)
For details on the RS-232C/RS-422A (or RS-232C/RS-485) converter and junction branch
boxes, see the each instruction manuals.
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