Siemens Climatix POL822 - Technical Data; Supply voltage and power; Operating conditions

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Siemens room unit QAA822 Building Technologies
Technical data
Supply voltage
Operating voltage
the room unit is supplied from the
connected controller via 2-wire
interface (SELV, extra low voltage
according to HD384)
DC 12...15 V
Power consumption (from the
controller)
Max. 0.22 VA
Operating conditions
Temperature sensor
Measuring element
NTC resistance sensor
Measuring range
0...40 °C
Response
 10 min
Accuracy (5 … 30 °C)
 1.0 K
Accuracy (25 °C)
 0.5 K
Display
Type
LCD
Display function
- Requirement adjustment
- Operating mode selection
- Manually selected fan speed
- Control sequence
- Time and weekday
- Parameter setting (only when selected)
Interface
Type of interface between the
controller and the room unit
2-wire interface connection
Voltage signal, logic 0
< 5 V
Voltage signal, logic 1
> 7 V
Maximum number of controllers
8
Baud rate
4.8 kbps
Cable connection
Connection terminals (screw terminals)
Solid or stranded conductors
0.8…2.5 mm2
Cable type
2-wire, twisted pair, unshielded
Max. distance between two units
75 m
Max. total busbar length
125 m
Degree of cover
protection
Protection according to EN 60529
IP 30
Protection class
Protection class
III
Ambient conditions
IEC 721-3
Operation
Transport
Ambient air
class 3K3
class 2K3
Temperature
+ 5...40 °C
– 25...70 °C
Humidity
< 85% r.h.
< 93% r.h.
Mechanical conditions
class 3M1
class 2M2
Industry standards
Electromagnetic compatibility
Immunity for residential, commercial
and light-industrial environments
EN 61000-6-1:2001
Emission standard for residential,
commercial and light-industrial
environments
EN 61000-6-3:2001+A11:2004
CE conformity