as mentioned in another topic, I would like to have a remote transmitter that is controlled by an external signal and then performs opening and closing operations accordingly.
The part I see as a reference (Secuentry 7072 remote) has a pulse duration 0.5-1s and a switching level of max 12V. However, at least one more cable would have to be inserted here, as it differentiates between opening and closing. So (12V, Ground, open, close for example) This remote would be the best choice for integration into existing Smarthome systems, e.g. Homematic, EKey home control unit and all other systems that can generate suitable signals via relay.