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5 Connecting to power supply
VEGATOR 142 •
46839-EN-190626
5.2 Input mode active/passive
Through the selection of the terminals, you can choose between ac-
tive and passive operation of the measuring data intput.
•
In active mode, VEGATOR 142 provides the power for the con-
nected sensors. Power and measurement data are transmitted
over the same two-wire cable. This mode is provided for connec-
tion of measuring transducers without separate power supply
(sensors in two-wire version).
•
In passive mode, the sensors are not powered, only the meas-
ured value is transmitted. This input is provided for connection of
transducers with their own separate voltage supply (sensors in
four-wire version). Furthermore the VEGATOR 142 can be looped
like a standard ammeter into the existing circuit. It is thus possible
to control multiple controllers with one sensor to detect different
limit levels.
Note:
With a VEGATOR 142 in Ex version, the passive input is not available
for reasons of approval.
5.3 Connection procedure
The pluggable terminals can be removed as needed to allow more
convenient connection. To make the electrical connection, proceed as
follows:
1. Mount the instrument as described in the previous chapter
2. Connect sensor cable 1 to terminal 1/2, and where applicable,
connect the screen
3. Connect sensor cable 2 to terminal 4/5, and where applicable,
connect the screen
4. Connect switched-off power supply to terminal 16/17
5. Connect relay 1 to terminal 10/11/12
6. Connect relay 2 to terminal 13/14/15
The electrical connection is finished.