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Why 24VDC power Supply is used as standard for all loop
powered transmitters?
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Answer Posted / maddy2504
It totally depends, 24 V DC 2 wire is not always applicable
every wehere some times it is 2 wire, 3 wire (2 cable for
power up & signal & 1 cable is for earthing), some times it
will 4 wire(2 for powerup & 2 for signal).
24 V Dc is for certain limit b'coz voltage will be drop in
that case w'll use 230v AC.
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