OT errors to switch relay

[HILTON]

Hi Im new to this forum so hello to everyone.

Im a commercial industrial heating engineer. I have a good knowledge of work with opentherm but nothing regarding it programming.

What i need is when an OT boiler has a fault i need it to simply switcha relay to turn on a light. This in principle is very easy but i have no clue how to do this.
im also suprised no commecrial manufactures have a simple pcb to do the function. Although vaillant produce it but much larger to do diffrent things so i know it can be done.

I would appreciate any help you coud give me.

Kind regards

Hilton

[hvxl]

The OT Gateway has configurable outputs, originally intended to drive LEDs. You can configure one (or more) outputs to come on when the boiler reports a problem (e.g. LD=M, which is actually the default). If you connect some simple circuitry to that output to drive a relay, I think you're all set.

[HILTON]

Thank you very much HVXL il look into it