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Siemens
QAX30.1, QAX31.1 – Room units with PPS2 interface
CA2N1741en_02
Building Technologies
2015-12-23
Technical data
Supply voltage
Operating voltage range
DC 12...15 V (SELV)
DC 12…15 V class 2 (US)
The room unit receives its power from the connected controller, via the PPS2 interface
Power consumption (from controller)
Max. 0.10 VA
Function data
Temperature sensor
Measuring element
NTC resistor
Measuring range
0 ... 40 °C
Response time
≤
8 min
Accuracy (5 ... 30 °C)
±
0.5 K
Accuracy (25 °C)
±
0.25 K
Setpoint correction
Correction range (determined by controller)
max.
±
12 K (default
±
3 K)
Accuracy over full correction range
10 %
Interfaces
Type of interface between controller and room unit PPS2 (point-to-point interface,
Version 2)
Baud rate
4.8 kbit/s
Cable connections
Connection terminals (screw terminals)
Stranded or solid conductors
0.8 ... 2.5 mm
2
Single cable length controller – Room unit
See Installation guidelines:
Desigo RXC: CA110334,
Desigo RXB & RXL: CM110381
Desigo RXA: CA2Z3884
Desigo PX: CA110396
2-core or 4-core, twisted pairs,
unscreened
Connecting cable for service tool
Off-the-shelf, max. 3 m
Protection data
Housing protection
IP 30 to EN 60529
Protection class
III to EN 60730-1
Ambient conditions
IEC 721
Operation
Transport
Ambient air conditions
Class 3K5
Class 2K3
Temperature
0 ... 50 °C
– 25 ... 70 °C
Humidity
< 85 %rH
< 95 %rH
Mechanical conditions
Class 3M2
Class 2M2
Standards, directives
and approvals
Product standard
EN 60730-1
Automatic electrical controls for house-
hold and similar use
Electromagnetic compatibility (Applications)
For use in residential, commerce, light-
industrial and industrial environments
EU conformity (CE)
CA2T1741xx *)
UL certification (US)
RCM-conformity (EMC)
A5W00005055 *)
EAC conformity
Eurasia conformity
Environmental
compatibility
Product environmental declaration (contains data on
RoHS compliance, materials composition, packaging,
environmental benefit, disposal)
A6V10736277_en--_a *)
Dimensions
See “Dimensions”
Color
Housing front, dial
NCS S 0502-G,
≈
RAL 9003 signal white
Housing, base unit
RAL 7035 light grey
Weight
Excluding packaging
0.12 kg
*) The documents can be downloaded from
http://siemens.com/bt/download
