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Siemens
QAX34.3 – Room unit with PPS2 interface
CM2N1640en_04
Building Technologies
30 Jun 2009
If the room unit is connected to a room controller in the DESIGO RXB, RXL or RXC
range, the display can be used as an aid to commissioning. If the commissioning tool
is used to transmit a Wink command, the room unit displays the type of room controller
connected. For example:
Room controller type
Display
RXB 21.1, RXL21,1, RXC21.1,
RXC30.1
Operating notes
During commissioning and operation, the LCD panel displays error messages:
Display Description
Type
of
error
C:
No communication with controller for over 64 s
02:
Firmware version (e.g. Version 2.0)
D
Room temperature sensor outside range 0 … 40 °C
S
The room controller has not yet added the room unit to its list of
members (during controller start-up)
D
The room controller does not recognize room unit type
D
Initial value, after room unit is switched on and before a room
controller has sent a value.
S
Room controller has not transmitted a valid temperature value
S
S Static error: The error display remains valid until the error has been cleared.
D Dynamic error: For 5 s after its occurrence, the error is displayed instead of the room temperature.
The display then reverts to normal. If the error persists, it can be displayed again by pressing the +
or – button. Pressing the button again implements a setpoint adjustment.
All other error codes indicate a hardware error.
Disposal
The device is classified as waste electronic equipment in terms of the European
Directive 2002/96/EC (WEEE) and should not be disposed of as unsorted municipal
waste.
The relevant national legal rules are to be adhered to.
Regarding disposal, use the systems setup for collecting electronic waste.
Observe all local and applicable laws.
Technical data
Supply voltage
Operating voltage range
SELV / PELV DC 12 ... 15 V
The device receives its power from the connected controller via the PPS2 interface
Power consumption (from controller)
Max. 0.10 VA
Displaying the “Wink”
function of KNX/EIB
and L
ON
W
ORKS
devices
