7 Connect power supply (switched off) to terminal 13/14
8 If necessary, connect relays or other outputs
9 Plug in terminal strip 2 on the lower side of the instrument
10 For connection of additional relais to terminal strip 3, you have to
proceed as described before
The electrical connection is finished.
Remember that with Ex applications, the Ex separating wall must be
plugged onto the upper side of the instrument before setup.
Information:
l On the active input (terminal 1/2), VEGAMET 391 provides power
for the connected sensors. Power supply and measurement data
are transmitted over the same two-wire cable. This mode is
provided for connection of measuring transducers without sepa-
rate operating voltage (sensors in two-wire version).
l On the passive input (terminals 5/6), the sensors are not supplied
with energy - only the measured value is transmitted. This input is
for sensors with their own separate operating voltage (sensors in
four-wire version). On a VEGAMET 391 in Ex version, the passive
input is not available due to approval/technical reasons.
VEGAMET 391 • 4 … 20 mA/HART signal conditioning instrument 13
5 Connecting to power supply
36032-EN-091116
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