The pulse value input 2-fold is used to set that in order to record the consumption values of, e.g., electric, gas, water, etc. via a zmeter with standardized S0 interfacez and then subsequently transfer them for evaluation and displaying to the room-manager with zenergy management functionz. The supply is carried out via a separate 24VDC power supply unit (110772 or 110773, not included as standard!!!).the 24VDC supply is fed through 2-fold at the pulse input and is therefore available for supplying the meter (if required). Notice: only use S0 sensors and observe the correct wiring!!! The device is mounted in the junction or installation box. Attention!: Does not work with xComfort Bridge . Notice: only use S0 sensors and observe the correct wiring!!! The device is mounted in the junction or installation box.