User Manual

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Siemens QAX50, QAX51 Flexible room unit CA2N1648en_05
Building Technologies 2015-12-23
Ordering
When ordering, please specify the quantity, product name, type code and configuration.
Unconfigured units are available only in the basic versions shown under “Type sum-
mary” above. The configuration code for these units is C000.
Example:
7 Flexible room units QAX51.5 / C000
The two different button sets can also be ordered separately:
Set A: SAP ordering No. 4268 277 30 (on/off lighting control)
Set B: SAP ordering No. 4268 277 40 (dimmer control)
Equipment combinations
The QAX50 and QAX51 are primarily used in conjunction with the RXC30 / RXC31 /
RXC38 room controllers and the associated extension modules, types RXC40 and
RXC41.
The room units are also used in conjunction with the RXC20, RXC21, or RXC22 for fan-
coil applications.
The flexible room units can also be used for the control of lighting and blinds (and to a
limited extent HVAC) in conjunction with L
ONMARK®-compatible third-party devices.
Mechanical design
The room unit is designed for mounting on a recessed conduit box. The bus cable is
connected to the unit from the rear with a plug-in connection.
Essentially, the flexible room units comprise a housing and base unit, connected by
releasable snap-fittings.
The housing accommodates a printed circuit board, room temperature sensor element,
buttons for setpoint adjustment, mode selection and fan-speed control, the LCD panel,
a configurable control panel, a plug-in connector for the bus and a socket for the
RXT10 commissioning and service tool.
The configurable control panel incorporates two rubber membranes and a total of 10
contact points. The contacts are operated by the buttons and rocker switches fitted into
the panel.
The flexible room unit has a plastic housing and a galvanized steel mounting plate.
80075
Mounting plate
Housing
Plug-in connector
for bus
Socket for
commissioning and
service tool
Unconfigured
room units
Button sets