3/6
Siemens
QAX30.1, QAX31.1 – Room units with PPS2 interface
CA2N1741en_02
Building Technologies
2015-12-23
Disposal
The device is classified as waste electronic equipment in terms of the European Di-
rective 2012/19/EU (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.
Engineering notes
The device receives its power from the connected controller via the PPS2 interface
(extra low voltage).
Only one room unit may be connected to a RX… room controller.
A maximum of 5 room units may be connected to a PXC… automation station (they are
identified by different settings of their address plugs)
A twisted-pair cable is required for the connection to the controller. Desigo RX uses
four-core cables, Desigo PX uses two-core cables (see the respective installation
guides). Screening is not required.
Mounting
•
The room unit is suitable for wall-mounting and for mounting on a recessed conduit
box.
•
Do not mount in recesses, shelves, behind curtains or doors, or above or near heat
sources.
•
Avoid exposure to direct sunlight or draughts.
•
The electrical wiring conduit must be sealed where it joins the room unit, to prevent
the occurrence of draughts in the conduit which could affect the sensor.
•
The specified ambient conditions must be complied with.
•
Mounting instructions are printed on the room unit packaging.
•
A mounting kit is included with the unit.
Installation notes
Local installation regulations must be observed.
The room unit is not protected against connection to AC 230 V.
Commissioning notes
After an interrupt of the PPS2 interface the communication will only be re-established
when the connected controller polls the PPS2 addresses. The duration of the corre-
sponding cycle is:
RXA: 10 sec; RXB, RXL and RXC: 3 min; PX: 30 sec.
STOP
Note!
Response on start-up
