Siemens QAX32.1 User Manual

CA2N1641

en_03

2015

-12-23

Building Technologies

1

641

Desigo

™ RX

Room unit with PPS2
interface

QAX32.1

for use with:

– devices of the ranges Desigo RXC, RXB, RXL, and RXA (PPS2)

– Desigo PX Automation stations 1)

– devices with a PPS2 interface

• Room temperature measurement

• Room temperature setpoint adjuster

• Control mode selector switch (

/ Auto)

• PPS2 interface to controller

• Socket for commissioning and service tool or service terminal

Use

The room unit is used in rooms controlled by an individual room control system, to
measure the room temperature and for operation of a room controller.

It can also be used in conjunction with a Desigo PXC… automation station

1)

.

The room unit incorporates a socket for a commissioning and service tool or service
terminal. This tool socket provides access via the PPS2 interface or via a bus system
(e.g. L

ONWORKS® bus) to the connected individual room controller.

1) If room units QAX32.1, QAX33.1, QAX34.1 or QAX84.1 are used in conjunction with a PXC

automation station, the room unit will show the request of the user and not the effective state.

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Siemens QAX32.1 – Room unit with PPS2 interface CA2N1641en_03
Building Technologies 2015-12-23

Ordering

When ordering, please specify the quantity, product name and type code.

Example:

30 Room units QAX32.1

Equipment combinations

The room unit is suitable for use in conjunction with all controllers which incorporate a
PPS2 room unit interface (e.g. Desigo RX, Desigo PX).

Mechanical design

The room unit is designed for surface mounting (with knock-outs for cable entry from
the top or bottom) or for mounting on a recessed conduit box with the cables connected
from the rear.

The unit comprises a housing and base unit, connected by releasable snap-fittings.

The base unit accommodates the screw terminals which have an integrated terminal
strip.

The housing accommodates a printed circuit board, room temperature sensor element,
setpoint adjuster, rocker switch for mode selection, plug-in connectors and a socket for
the commissioning and service tool or service terminal.

Both the housing and base are made of plastic.

Base unit

Housing

80082

80084

Socket for the commissioning
and service tool or service

terminal

80167A

Dial for stepless adjustment of the setpoint

LEDs to indicate control mode
Rocker switch for mode selection

The controller control mode can be selected on the basis of occupancy, using the
rocker switch on the room unit (press left or right arrow). The current control mode is
indicated by a LED.

Position

Control mode 1)

The controller operates at the setback setpoints (at night, or when room is

unoccupied or occupied intermittently)

Auto

Comfort mode (room occupied)

1) For details of these functions, refer to the application description for the relevant controller range.

Operator controls

and indication

Rocker switch for mode
selection