Loop-powered display unit
Wiring
21
Circuit diagram / Description
4-wire sensor with
process display unit and
loop power supply,
without backlighting
1
3
Y
I
2
LED
-
+
A0020837
1
HART
®
communication resistance module
2
Power supply of 4-wire device
3
Sensor
4-wire sensor with
process display unit and
loop power supply, with
backlighting
1
3
Y
I
2
LED
-
+
A0020838
1
HART
®
communication resistance module
2
Power supply of 4-wire device
3
Sensor
