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Application
Use as an I/O module
Functions
Inputs and outputs
Integration into the
building automation
and control system
2/14
Siemens
Building Technologies
The RXC32 controller is optimised for the control of variable air volume (VAV) systems.
It is designed for control of the supply or extract air with volume control dampers. The
controller may also be used for the control of electric or LPHW reheaters.
The controller application is determined by downloadable application software, also
referred to simply as the "application". The various applications and the associated
functions are described in detail in the applications library (V1: CA2A3810,
V2: CA110300).
The controllers are delivered pre-loaded with a particular application or with basic
application 00032. The basic application, which contains only I/O module functions, is
overwritten with the definitive application in the commissioning phase. The RXT10
commissioning and service tool is used for this purpose (see "Commissioning").
In conjunction with a building automation and control system, the RXC32 controller can
also be used as a universal I/O module, e.g. to register digital signals or to control
various equipment (ON/OFF or pulse control with AC 24 V). In this case the controller is
loaded with basic application 00032. The inputs can then be read and the outputs
overridden via the building automation and control system.
The controller functions are determined by the selected application and its parameters.
For a detailed description of functions, refer to the Desigo RXC applications library (V1:
CA2A3810, V2: CA110300).
Certain input and output parameters can be set for various functions making it possible
to cover a wide range of VAV systems. (For parameter settings for the various
applications, refer to the Desigo RXC applications library (V1: CA2A3810,
V2: CA110300).
Input
Function
D1
Occupancy sensor (volt-free contact)
−
Window switch (volt-free contact)
D2
−
X1
LG-Ni 1000 temperature sensor (passive)
−
Air quality sensor (DC 0...10 V)
−
Output
Function
Y1 and Y2
3-position damper actuators (AC 24 V)
−
Y3
Radiator with thermic valve (AC 24 V, PDM)
−
Electric reheater (AC 24 V, on/off)
Y4
−
Y3 and Y4
LPHW reheater with motorised valve (AC 24 V, 3-position)
−
When Desigo RXC is integrated into a building automation and control system
additional functions become available such as time scheduling, central control of
setpoints, etc. (refer to the Desigo INSIGHT documentation for further information).
RXC32 – Room controller for VAV systems
CA2N3845en_06
2013-06-18
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