SUL 289 g- Analogue Time Switch. SUL 289 g is an analogue time switch with daily or weekly programming. Features and Benefits. 2 Channels Power reserve (NiMH rechargeable battery) Quartz controlled 49 Tappets included in delivery Shortest switching time: 20 min or 2 hours Clock hands for time display Switching status display Screw terminals Front panel/wall installation 3 days full power reserve, approx. 3 days after connection to operating voltage