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2. WIRING THE CURRENT LOOP
The 4-20 mA current loop module has an input terminal and an output terminal. Both are indicated on a
label on the inside of the flowmeter door. The current loop output is rated for a loop resistance of up to 1 k
ohms and is isolated for up to 5 kV when loop-powered.
The 4-20 mA module is shipped with the current loop self-powered. Switch the module to loop power by
moving a jumper on the module. Current loop modules which are loop-powered must be driven from an
external power supply. In this case the flowmeter acts as a passive 2-wire transmitter.
Prevent possible electrical shock and/or damage to the meter – disconnect power
PRIOR to removing back cover of the breakout box and disconnect the breakout
box from the flowmeter and battery charger/AC adapter.
To connect the current loop:
1. Ensure the loop powering option is correct.
2. Locate the jumpers on the upper right corner of the module. Refer to Figure 2.1-A (below) to change
the jumper settings.
3. Refer to Figure 2.1-B (below) for the self-powered option or Figure 2.1-C (below) for the loop-powered
option.
FIGURES 2.1-A (LEFT), 2.1-B (RIGHT, TOP), 2.1-C (RIGHT, BOTTOM)
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