Wiring Plan; Setup With The Integrated Display And; Adjustment System - Vega MET 381 EX Mise En Service

instruments.
1. Place the Ex separating chamber as shown
below on the terminals of the sensor input
2. Lead the sensor cable towards the front and
out of the Ex separating chamber
3. Push the Ex separating chamber towards
the front until you hear it snap in
5.4

Wiring plan

Overview
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1
1 2
1 2
7
18 17 16 15 14 13 12 11 10 9 8 7 6 5
3
Abb. 15: Wiring plan with two-wire sensor
1 Measurement data input, optionally available with
sensor power supply
2 Current output
3 Fail safe relay
4 Relay 2
5 Relay 1
6 Voltage supply
Tipp:
For parameter adjustment of connec-
ted HART sensors, the sockets are
integrated in the terminals of the meas.
data input. A VEGACONNECT can be
VEGAMET 381 Ex • 4 ... 20 mA signal conditioning instrument
+ -
2
3 4
1
2
on
%
N- L1+
4 5 6
6 Setup with the integrated display and adjustment unit
directly plugged in without the need of
an additional HART resistor.
6 Setup with the integrated
display and adjustment
unit
6.1

Adjustment system

The integrated display and adjustment unit is
for measured value display, adjustment and
diagnosis ofVEGAMET 381 Ex. Indication and
adjustment is carried out in the front via a clear
LC-display and a function switch as well as two
keys.
To open the cover, insert a screwdriver in the
two slots on the top and turn it slightly.
1 2
8
7
6
Abb. 16: Display and adjustment elements
1 Status indication operating relay 1 and 2
2 Status indication fail safe relay
3 Status indication operation
4 [+/-] adjustment keys
5 Insertable tag for identification of the measure-
ment loop
6 Function switch
7 Mode switch for sensor input (active/passive) on
the rear of the instrument
8 LC display
Key functions
•
[Function switch] for selection of:
– Adjustment
– Relay switching points
– Indication scaling
– Current output
– Integration time
– Offset correction
1
2
3
+
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4
5
25