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Siemens
RXC32 – Room controller for VAV systems
CA2N3845en_06
Building Technologies
2013-06-18
The sensor uses an integrated NTC thermistor to measure the cooling effect of the air
flow. The effect of the air temperature is compensated by the sensor. The controller
processor calculates the air flow by means of the sensor signal.
The RXC32 controller communicates with other devices via the following interfaces:
•
L
ON
W
ORKS
® bus (terminals CLA and CLB) for communication with:
−
the PXR system controller or the NIDES.RX interface (to Desigo)
−
other Desigo RXC devices
−
L
ON
M
ARK
-compatible 3
rd
party devices (e.g. presence detector)
•
PPS2 (terminals CP– and CP+):
−
Interface to the QAX… room units. (In addition to PPS2, the L
ON
W
ORKS
® bus is
also looped to the tool socket on the room unit.)
•
Tool socket (RJ45) on the controller or room unit, for:
−
RXT10 commissioning and service tool (L
ON
W
ORKS
® bus)
−
RXT20.1 service terminal (PPS2)
The diagram below shows the wiring of the L
ON
W
ORKS
® bus and PPS2 interface when
a QAX… room unit is connected. It also shows the options for connecting the RXT10
commissioning and service tool and the RXT20.1 service terminal.
The yellow service LED shows the current operational status of the controller by means
of different flashing patterns (see the RXT10 user manual, CM110669).
The service pin is used to identify the controller in the commissioning phase. When the
pin is pressed the controller’s identification number is transmitted to the RXT10
commissioning and service tool.
Flow sensor
Communication
L
ON
W
ORKS
®-Bus
and PPS2
Service LED
Service pin
