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6 Technical data
Nominal frequency 50…60 Hz
Overvoltage protection
Max. permissible voltage DC 24 V (terminals D1/D2)
-13…5 V (terminals D3/D4)
Safety class to EN 60730 III
Degree of protection to EN 60529
(when mounted on a closed wall) IP 30
Electromagnetic compatibility
Immunity EN 50082-2
Emissions EN 50081-1
conformity
Electromagnetic compatibility 89/336/EEC
Low voltage directive 73/23/EEC
Perm. ambient conditions to IEC 721:
Operation 3K3 (IEC 721-3-3) 0…35 °C
Transport 2K3 (IEC 721-3-2) -25…70 °C
Storage 1K3 (IEC 721-3-1) -25…70 °C
NTC temperature sensor:
Time constant 10 min.
Thermal coupling to the wall 50 %
Permissible cable lengths
0.25 mm
2
25 m
From 0.5 mm
2
50 m
Weight 0.22 kg
Backup of clock 12 h
Room temperature measurement range 0...32 °C
Setting ranges:
Nominal temperature 5...30 °C
Reduced temperature 5...30 °C
Temperature readjustment range ±3 °C
Resolution 0.5 °C
Ordering multiple 20 pieces
17/20
Siemens Building Technologies Room Unit QAA70 CE1P1638E
Landis & Staefa Division Technical data 17.04.2000
17


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