Contemporary Control Systems BASremote Installation Guide - Manual (Page 17)

TD040300-0II
17
as that loop supply has a common connection with the BAS Remote.
The less positive connection is made to point A on the input.
Figure 14 — Analog Input Connections
Care should be exercised when connecting to a three-wire current
transmitter. These are usually non-isolated devices between the power
source and signal output. The BAS Remote will sink current from its
input to ground so the transmitter must source current from a positive
potential to ground. If the three-wire transmitter works in this manner,
it can be accommodated.
Four-wire transmitters usually have isolation between power supply and
signal output so their output stage can usually be treated as a two-wire
transmitter.