Endress+Hauser Preline RN 221N Betriebsanleitung Seite 20

Active barrier
3. Electrical connection
3.1 Terminal layout
Teminal layout
L/+ L for AC + for DC
N/- N for AC - for DC
Ground (PE)
O+ Measurement signal +
O- Measurement signal -
Measurement signal + with integrated HART
O+H
communication resistance (250 Ω)
I+ Measurement signal +
I- Measurement signal -
®
HART - communication to
®
HART
SMART transmitter
3.2 Power supply connection
- Before installing the unit please check that the power supply
corresponds with that shown on the unit legend plate.
- When operating with a 90...253 V AC unit a power isolator must
be situated within easy reach of the unit, this should also be fused
with at least 10 A.
18
®
HART -
connection sockets
In- and outputs
Power supply
Measurement signal
output (Non-Ex -area)
®
Measurement signal
input (Ex- area)
Communication
sockets