Chapter 2 Installation
16
2.2.6 Communications
A connection to the RS-485 communication port can be made from
a distance of up to1200 meters, with up to 32 instruments on one
multi-drop line.
Figure 2-13 RS-485 Multidrop Computer Connection
NOTE: Where an RS-232/RS-485 converter is used on a computer
connection, R1 is not applicable since it is built in to the converter.
Activity on the communications port lines is indicated via the
Status Information menu (see Chapter 6).
A full description of the communication protocols may be found in
the PM130 ASCII, Modbus or DNP3.0 Communications Manuals
provided with your instrument.
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