Honeywell Modulation testen: hoe??

[ruudvee]

Ik wil deze thermostaat even testen (of de knopjes nog werken)
Kan ik op de OpenTherm contacten gewoon 12 volt DC zetten, of blaas ik de boel dan op?
Wil hem niet aan mijn ketel hangen, teveel gedoe.

[real[B]art]

Via Wikipedia: OpenTherm:

quote: http://www.domoticaforum....erm%20Protocol%20v2-2.pdf

3.3.2 Power-Feed Characteristics
3.3.2.1 Room Unit Current
Guaranteed current available from the line is the minimum allowable idle signalling current (5 mA). This
includes the current necessary to operate the regulator which develops the supply voltage in the room unit.
Room unit current consumption : 5 mA max.
3.3.2.2 Room Unit Voltage
The minimum voltage available to supply the room unit circuitry is a function of the implementation of the
room unit communications interface. It is directly related to the Idle Line voltage and to the voltage drops
associated with the polarity management circuitry and the voltage signalling circuit in idle state.
As a guide, a nominal voltage of 3.3V is achievable with a low cost implementation of the interface.
3.3.2.3 Connection polarity
The room unit shall provide the functionality to operate regardless of polarity of the line signal.
3.3.2.4 Galvanic isolation
The boiler interface shall provide safety isolation from the mains power line (ref. EN60730-1)

Op pagina 12 begint hoofdstuk 3 mbt de physical layer, daar is nog meer info en grafiekjes te vinden