User Manual

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Siemens QAX84.1/PPS2 – Flush-mounting room unit with PPS2 interface CA2N1649en_04
Building Technologies 2015-12-23
Type summary
• QAX84.1/PPS2 PPS2 room unit, flush-mounting
(Items supplied: plug-in operator unit, bus coupling unit,
Siemens DELTA-line bezel in titanium white)
Ordering
When ordering, please specify the quantity, product name and type code.
Example:
30 PPS2 room units, flush-mounting QAX84.1/PPS2
Compatibility
The flush-mounting PPS2 room unit can be used with all controllers with a PPS2 room
unit interface (e.g. Desigo RX and Desigo PX).
Mechanical design
• The unit is designed for mounting in a conduit box (A)
(suitability must be clarified in advance)
• Essentially the device consists of the plug-in operator unit (D) and the flush-
mounting bus coupling unit with a PPS2 connection (B)
The two are interconnected with clamping springs.
• A Siemens DELTA-line Bezel (C) is supplied. The device is compatible with
DELTA-vita and DELTA.miro bezels. Bezels from various other manufacturers can
also be used (suitability must be clarified in advance)
• The operator unit (D) incorporates the room temperature sensor element, buttons
for setpoint adjustment, selection of control mode (
/ Auto) and fan-speed control,
the LCD panel, the plug-in connection to the bus coupling unit, and spring clamps to
secure the two parts.
• The bus coupling unit (B) contains the electronics for the PPS2 interface and the
contact pins which plug into the connection terminals for the PPS2 cable.