General notes about Hörmann garage door and gate openers

Most Hörmann openers are following the same standard, where the 5 and 20 relay is used for powering up Nold. Relay 20 and 21 are mostly used for the push button, this is where Nold's output will connect. In short, if you have a Hörmann opener and its not in the compatibility list, it will be most likely compatible with Nold Open the same way as the other Hörmann models.