EIB binary input 9-way with contact query Binary input 9-way REG, generates bus telegrams via 9 independent inputs. The device provides the signal voltage from the bus voltage. Potential-free buttons or switches can be connected. Each contact has screwless spring terminals. Each channel has an indicator LED that shows the signal status at the input. Connection also possible in multiple phases and with different input voltages. 2 different telegrams can be generated with the switching function.