User Manual

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Siemens HVAC central apartment unit with consumption data acquisition QAX903 CE1N2741en
Building Technologies 2016-01-30
RF
868.3 MHz (bidirectional)
Range
Typically 30 m in buildings
RF protocol
KNX RF-compatible
Bus protocol / type
KNX TP
Bus power supply
Simplified bus power supply, 12.5 mA; bus
power supply may only be switched on for
operating an OZW771 or OZW772.
Service interface
RJ45 plug on underside of housing
Fully graphic backlit display (white background)
Type
LG-Ni 1000 resistance, on/off
Number
1
Measuring range
0…120 °C
Copper cable 0.6 mm dia.
Copper cable 1 mm
2
Copper cable 1.5 mm
2
Max. 20 m
Max. 80 m
Max. 120 m
Number
1
Type
NO contact AC 24…230 V,
AC 0.02…2 (2) A
External supply line protection
See section power supply
Screw terminals for wire cross section
Max. 1.5 mm
2
Protection class
II as per EN 60730
Degree of protection of housing
IP20D as per EN 60529
Degree of pollution
2 as per EN 60730
Operation
60721-3-3
Transport
60721-3-2
Storage
60721-3-1
Climatic conditions
Class 3K5
Class 2K3
Class 1K3
Temperature
0…+45 °C
-25…+70 °C
-20…+65 °C
Humidity
< 95 % r.h.
(non-condensing)
<95 % r.h. < 95 % r.h.
(non-condensing)
Mechanical conditions
Class 3M2
Class 2M2
Class 1M2
Elevation above sea level
Min. 700 hPa,
Max. 3,000 m above sea level
Product stand
ard
EN 60730-1
Automatic electrical controls for household
and similar use
Product family standard
EN 50491
-x
General requirements for Home and Building
Electronic Systems (HBES) and Building
Automation and Control Systems (BACS)
Electromagnetic comp
atibility
(Applications)
For use in residential, commerce, light
-
industrial and industrial environments
EU conformity (CE)
CE1T2707xx *)
EAC conformity
Eurasia conformity
eu.bac
Meets the requirements for eu.bac certification
See product list at:http://www.eubaccert.org/licences-by-criteria.asp
QAX903
-9 Energy efficiency
class
Control accuracy
in K
Water Heating System (RTp)
License 213367
AA 0.4
Water Floor Heating Systems
License 215478
AA 0.5
Radio communications
Wired communications
Display
Universal input
Permissible cable length
to sensor or external
switch
Relay output
Electrical connection
Protection data
Ambient conditions
Standards, directives and
approvals