Siemens RVA47.320 - Page 161

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Technical data 15.07.2002
outside temperature sensor NTC (QAC31) or
Ni 1000 (QAC21)
D.h.w. sensor Ni 1000 Ω at 0 °C (QAZ21)
Cascade flow temperature sensor Ni 1000 Ω at 0 °C (QAD21)
Cascade return temperature sensor Ni 1000 Ω at 0 °C (QAD21)
buffer storage tank sensor Ni 1000 Ω at 0 °C (QAZ21)
H1 as an analog input with
safety extra low voltage (SELV) U
H1
= (12...24) V
(contact open)
I
H1
= (2...5) mA
(contact closed)
H1 as an analog input with
safety extra low voltage (SELV) U
in
= (0...10 V) für 0...130 °C
R
in
= 100 kΩ
max. ratings 20 V; 20 mA
Backup of time switch > 12 hours
Weight approx. 0.5 kg
Software class to EN 60 730 class A
Inputs
Miscellaneous