Signal Connections; Electrical Connection Configuration Options - Xylem OMNI sensus C2 User Manual

3 Signal connections

The OMNI+ registers use fully solid-state electronics.
The OMNI+ C2/F2/T2 register is available with an optional programmable digital pulse
signal suited for interfacing with ACT-PAK instruments and SCADA systems to achieve a
4 to 20 mA output.
The OMNI+ R2 register outputs a programmable (using a Sensus FieldLogic
Communicator) register ID and AMR reading digits.

Electrical connection configuration options

The OMNI+ C2/F2/T2/R2 register is standard with AMR output wires in a variety of
lengths and interfaces. The OMNI+ C2/F2/T2 register is available with an optional 25
foot long pulse wire. Splicing of these wires or connecting to these wires should be
performed in accordance with standard practices depending on the environment of the
application. Care must always be taken when connections are made for meters in high
humidity or flooded pit settings. Maximum pulse cable length should be 1000 feet
without a repeater.
The OMNI+ register can be configured in four arrangements, shown in the following
illustrations.
Illustration 1
Illustration 1 is used when the OMNI is connected to a PLC (e.g., in a SCADA system).
The PLC should not have an internal pull-up resistor in its input circuit (no DC voltage at
the instrument inputs). Usually the instrument must be isolated by having an optical
isolator at its inputs.
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