Endress+Hauser RMA 422 - Power Supply Connection; Connecting External Sensors; Display and Operating Elements

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 the version 90...250 V
AC
a power
isolator must be situated within easy reach of the unit, this
should also be fused with ≤ 10 A.
3.3 Connecting external sensors
3.3.1.Active current source 0/4...20 mA (e.g. transmitters with
their own power supply)
3.3.2 Loop powered 2 wire transmitter using the internal loop
power supply.
terminals L/L+ and N/L- are
internally linked and can be used as
support for serial loop connection.
+
-
101 102
103
Analogue input 1
+
-
201 202
203
Analogue input 2
+
-
I
Y
101
103
102
Analogue input 1
+
-
I
Y
201
203
202
Analogue input 2
The HART
®
programming unit for setting up sensors can be
directly connected to the unit using the front mounted
communication sockets without the need for any further wiring.
Process transmitter
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