Endress+Hauser RIA15 - Page 25

RIA15 Wiring
Endress+Hauser 25
Circuit diagram / Description
2-wire sensor with
process display unit
and active barrier
RN221N as
transmitter power
supply
Y
I
1
2
3
O+
O-
RN221N
R
s
R
LED
- +
A0019576
1 Sensor
2
HART
®
primary master
3
HART
®
resistance
Optional HART
®
communication resistance module
A HART
®
communication resistance module is available as an accessory, see the
"Accessories" section →  49.
Please refer to the section on installation when mounting the HART
®
communication
resistance module →  18
Wiring
Circuit diagram / Description
2-wire sensor with
process display unit
and transmitter 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 transmitter power
supply, with
backlighting
1
3
2
Y
I
R
s
DC
LED
- +
A0020840
1
HART
®
communication resistance module
2 Sensor
3 Power supply