VEGA VEGALOG 571 EA - Manual (Page 14)

Information:
The inputs are only floating for voltage supply, between each
other they are connected by a common ground.
l
On the active input, power is provided for the connected
sensors. Power supply and measurement data are trans-
mitted over the same two-wire cable. This mode is
provided for connection of measuring transducers without
separate power supply (sensors in two-wire version).
l
On the passive input, no sensors are powered, only the
measured value is transmitted. This input is for connection
of transmitters with their own, separate power supply
(sensors in four-wire version).
14 VEGALOG 571 EA - Input card analogue
Connecting to voltage supply
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