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4.2.3
Connecting 4-20mA Transmitters
Connection a
Connection b
Measuring current with loop power
In order to test a 2-wire loop powered transmitter, which is
disconnected from wiring, use the loop power function. This function
activates a 24V supply, in series with the current measuring.
Connect as shown on figure "Connection a".
Measuring current without loop power
Transmitters with built-in supply or transmitters using external supply
are connected as shown on figure "Connection b".
Measuring ground
E -
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