Wiring plan for four-wire sensor, 5 connecting to power supply – VEGA VEGAMET 391 4 … 20 mA_HART User Manual
Page 16
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5 Connecting to power supply
VEGAMET 391 • 4 … 20 mA/HART
36032-EN-130701
+
+ + + + -
-
9
10 11
12
14
15
13
OK
ESC
on
1 2 3 4 5 6
8
7
11
10
3
9
5
4
2
1
6
12
17
18
14
15
22
16
20
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13
29
30
26
27
34
28
32
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35
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25
+
-
L+
N-
5 4
3
6
1
7
8
2
Fig. 6: Terminal assignment with four-wire sensor
1 Relay 1
2 Relay 2
3 Relay 3
4 Relay 4
5 Relay 5
6 Relay 6
7 Current output
8 Operating voltage of the signal conditioning instrument
9 Measurement data input with sensor supply (active input)
10 Connection for HART modem for sensor parameter adjustment
11 Measurement data input (passive input), not with Ex-ia version
12 Digital input 1 … 4
13 Common ground for digital input 1 … 4
14 4 … 20 mA/HART sensor (four-wire version)
15 Power supply for four-wire sensor
Wiring plan for four-wire
sensor
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