User Manual

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Siemens Frost detectors A6V10432020_en--_c

2019-04-29

Diagrams

B M

1821G01

G System voltage (SELV) AC 24 V

M System neutral, measuring neutral

B Signal output DC 0...11.5 V 0...15 °C

Note:

If terminal "B" of the QAF… is connected to a controller,

signal >10 V might drop out (e.g. 11 V) which, with certain

types of controllers, can lead to a fault status message.

Remedy:

Fit a Zener diode to terminal "B" of the QAF.. or to the

controller’s input to ensure that the DC 0…10 V signal will

not exceed 10 V.

Internal diagram