Terminal Layout - Endress+Hauser RN221N Guide Condensé

Wiring
5.1

Terminal layout

Y
I
Input with
loop power supply
(as option
intrinsically safe)
 2 Terminal layout
Input - sensor connection
There is no need for any external components to supply any transmitters connected. If there is
a possibility of electrical transients on long signal cable runs we would recommend that an
overvoltage protection unit is used.
Output - connection to further instruction
Please take note of the respective volt drop when including the communication resistance in
the current circuit!
Terminal layout
L+ L for AC; + for DC
N- N for AC; - for DC
Ground (PE)
O+ Measurement signal +
O- Measurement signal -
O+H Measurement signal + with integrated HART®
communication resistance (250 Ω)
I+ Measurement signal +
I- Measurement signal -
HART® HART® communication to SMART transmitter
18
®
HART - connection sockets
20 to 250 V
L/+
N/- N/-
DC/AC
50/60 Hz
R = 250
Output
4 to 20 mA
In- / Output
Power supply
Measurement signal output (non-hazardous area)
Measurement signal input (Ex-area)
Communication sockets
RN221N
PLC
A0031204-EN
Endress+Hauser