User Manual

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Siemens Non-communicating room controllers CA2N3881en_02
Building Technologies RXA20.1, RXA21.1, RXA22.1 2012-08-28
Design
The RXA20.1, RXA21.1 and RXA22.1 room controllers consist of a housing base, a
housing cover and the printed circuit board. The printed circuit board incorporates the
connection terminals and the DIP switches used for configuration. The controllers also
have a potentiometer for setpoint adjustment and testing, and a Service LED with
different flashing patterns to indicate operational status and test states.
Connection
terminals
Housing cover
Connection
terminals
00608
Cable restraints
DIP switches
Housing base
Service LED
Potentiometer
Terminal covers (RXZ20.1) are available as an option, to protect the connection
terminals from physical contact and dirt. The Service LED and the potentiometer
remain visible even with the terminal covers fitted. The potentiometer can be operated
with a screwdriver. The cable is connected to the room controller by breaking out the
perforated cable entry guide.
70200
Removing the terminal cover
Protection standard
Temperature range
(0 … 50 °C)
Serial No.
Test date, series
(Z, A, B, C…)
Observe notes
in this document
Programmed application
Location
3881Z01
090601A 513
Terminal cover
Label
(example for RXA21.1)