VEGA VEGAMET 391 With SIL qualification - Manual (Page 14)

14
5 Connecting to power supply
VEGAMET 391 • With SIL qualification
38704-EN-130228
measurement data are transmitted over the same two-wire cable. This
mode is provided for connection of measuring transducers without
separate operating voltage (sensors in two-wire version).
A passive input is not available with VEGAMET 391 with SIL qualifica-
tion.
5.3 Wiring plan
8 7 11 10 3 9 5 4 2 1 6 12
17 18 14 15 22 16 20 21 23 24 19 13
29 30 26 27 34 28 32 33 35 36 31 25
+ -
L+
N-
+ + + - -
4 3
7 8 9
1 5 6 2
10
11
OK ESC
on
1 2
SIL
3 4
Fig. 5: Wiring plan with two-wire sensor
1 Relay 1
2 Relay 2 (optional fail safe relay)
3 Relay 3 (SIL)
4 Relay 4 (SIL)
5 Current output
6 Operating voltage of the signal conditioning instrument
7 Measurement data input with sensor supply (active input)
8 Connection for HART modem for sensor parameter adjustment
9 Digital input 1 and 2
10 Common ground for digital input 1/2
11 4 … 20 mA/HART sensor (two-wire version)
Wiring plan for two-wire
sensor