BVPC 850-0 Bus video panel Comfort with touchscreen 17.8cm for the Siedle In-Home bus. With the functions calling, speaking, viewing, door opening, light, floor call/switching/control functions, message displays and internal communication. Operating voltage: 20-30 V DC, operating current: max.400 mA, contact type: potential-free S1/S1 max.15 V AC, 30 V DC 1 A, switching time 0.4 sec.-19 min.