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4.5 RS-485 Connection Board
The RS485 Connection Board (Option V186) provides RS485 serial port expansion from
one input port to six expansion ports.
The unit is pre-installed in the horizontal slot at the top of the frame (above the CPU and
I/O modules), See Figure 4-11.
4.5.1 Installation
Figure 4-11 RS-485 Connection Board – Installation Location
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The RS485 Multiplexer and Line Interface Unit are installed in the
same place, and mutually exclusive, i.e. only one of these modules
can be installed in the RTU.
4.5.2 Wire Connections
To connect the RS485 adapter proceed as follows:
1. Connect communication cable between the Multiplexer Input port and the CPU
RS485 port (Port 1A).
2. Punch a hole at the relevant location and of the appropriate size in one of the
perforated circles at the bottom of the RTU housing and thread the external
connection cables through the opening.
3. Connect the communication cables (p/n: FKN4400) to your RS485 devices.
RS-485 Connection
Board
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