4-20 mA output connectionsFigure 3-10:
3.6 RS-485 serial connections
The meter may include an optional RS-485 two wire serial connection. For an RS-485 serial
communications network should always be a Use high quality cable such as Belden 8162 or
Alpha 6203C. For a two-wire system requires two twisted pairs, and a four-wire system
requires three twisted pairs (the extra twisted pair is needed for the signal ground.
RS-485 two wire serial connectionsFigure 3-11:
S-485 four wire serial connectionsFigure 3-12:
3.7 Open collector output connections
Open collector output 1 and 2 connections are made to terminals labeled OC1+ and OC1-,
and OC2+ and OC2-. Connect the alarm or pulse input device as shown in the figure below.
Product connections
20 LTM Internal Display
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