Via the relay modules, outputs can be switched. A relay module has no specific function but can handle any switch functions: monostable (eg a doorbell), bistable (on / off), timer, interval, thermostat output. Some relays can also control motors of blinds, curtains, gates.

Module which counts and processes pulses received from a pulse meter. Any pulse meter can be connected to the ECM04 as long as the contacts are potential-free. The ECM04 can receive a pulse every 250ms. Alarms can be triggered based on a set number of pulses, for example to receive green energy certificates every kW generated by solar panels.