Yearly timer (prepared for DCF or GPS), Busch installation bus KNX, control, logic and time, yearly timer (prepared for DCF or GPS) 4-channel For time-dependent switching and dimming, for temperature or heating control and for sending time/date. GPS-controlled in conjunction with additional antenna 6144/41. Radio-controlled in conjunction with additional antenna 6144/42. GPS antenna requires an auxiliary voltage of 12-30 VDC e.g. from 6358-101. Power supply unit for DCF reception is integrated. Programming on the timer or with a PC (programming set 6144/43). Data transfer and data backup possible using optional memory card 6144/44. Memory locations: 300 Power reserve: approx. 10 years. The bus connection is made via the enclosed bus terminal. Control elements: Keypad Display elements: LCD display Connections: KNX line: Bus connection terminal Outputs: 4 Protection class (device): IP 20 Temperature range (device): -30 °C to 55 °C Dimensions (H x W x D): 45 mm x 71.5 mm x 58 mm Installation depth: 68 mm Pitch unit: 4 HP