Wiring
Loop-powered display unit
20
Wiring
Circuit diagram / Description
2-wire sensor with
process display unit and
loop power supply,
without backlighting
1
LED
-
+
3
2
Y
I
R
s
DC
A0020839
1
HART
®
communication resistance module
2
Sensor
3
Power supply
2-wire sensor with
process display unit and
loop power supply, with
backlighting
1
3
2
Y
I
R
s
DC
LED
-
+
A0020840
1
HART
®
communication resistance module
2
Sensor
3
Power supply
