User Manual

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Siemens Non-communicating room controllers CA2N3882en_02
Building Technologies RXA29.1 2012-08-28
Mounting instructions
The room controllers can be mounted in any orientation using the following fixing
options:
00609
00610
Rail mounting
The housing base is designed for snap-
mounting on DIN rails, type EN50022-35x7.5
(can be released with a screwdriver)
Surface mounting
There are two drill holes for screw-mounting (see
“Dimensions” for drilling template).
The housing base is fitted with raised supports.
Screws: Max. diameter 3.5 mm, min. length 38 mm
STOP
Note!
Tightening torque for fixing screws max. 1.5 Nm
When mounting note the following:
 The controller should not be freely accessible after mounting
 Ensure adequate air circulation to dissipate heat generated during operation.
 Easy access is required for service personnel
 Local installation regulations must be observed.
Mounting instructions and a drilling template are printed on the controller packaging.
Commissioning
The controller application and the configuration of the connected field devices are
defined manually with DIP switches and the potentiometer. The Service LED provides
information on power up and operational status.
There is no special test for checking that the connected field devices match the DIP
switch settings. Depending on the application, if the controller has insufficient
information it switches to "Idle" mode (all outputs at zero) and the LED remains on
continuously.
For details refer to the applications library CA2A3886.
STOP
Caution In the event of a long-term short circuit or overload, the thermal fuse in the
transformer may trip. The controller must then be replaced.
There is no protection against accidental connection with 230 V on the AC 24 V
side.