Siemens QAX34.1 User Manual

CA2N1645en_02
30 Jun 2009
Building Technologies
1
645
DESIGO™ RX
Room unit with PPS2
interface
QAX34.1
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
 Rocker switch for adjustment of the room temperature setpoint
 Rocker switch for control mode selection (
/ Auto) and manual control of
the fan in fan-coil systems (up to 3 speeds)
 PPS2 interface to controller
 LCD with room temperature and control mode display
 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 mea-
sure the room temperature and for operation of the room controller. The functions of the
LCD display are determined by the controller. If manual fan-speed control is enabled,
the room unit is suitable for control of a fan-coil system.
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 auto-
mation station, the room unit will show the request of the user and not the effective state.

Siemens QAX34.1 Specifications

General

Type	Room Thermostat
Mounting	Wall-mounted
Digital Inputs	1
Triac Outputs	1
Degree of protection	IP30
Switching Current	0.5 A
Setpoint Adjustment	Via rotary knob
Power Supply	24 V AC / 24 V DC
Temperature Range	0 to 50 °C
Power Consumption	2 VA

Summary

Use

Room temperature measurement

Measures the room temperature for controller operation.

Setpoint adjustment

Allows adjustment of the room temperature setpoint via rocker switch.

Control mode and fan speed selection

Controls operating mode and fan speed (up to 3 speeds) in fan-coil systems.

PPS2 interface

Provides PPS2 interface for communication with the controller.

LCD display

Displays room temperature and control mode.

Service tool socket

Socket for connecting commissioning and service tools.

Mechanical design

Operator controls and indication

Details the display and rocker switches for user interaction.

Rocker switch function

Explains the rocker switch's role in mode and fan speed control.

Operator controls and indication details

Rocker switch setpoint adjustment

Details how to adjust the room temperature setpoint using the rocker switch.

LCD display functions

Commissioning and Operation

Start-up response

Operating error codes

Technical Data

Electrical specifications

Sensor and setpoint data

Display and interface details

Cable and connection specifications

Connection Details

Terminal layout and function

Connection diagram example

Connection points