If you need to switch something on or off some time after actually deactivating it the use of a timer is a good choice. Timers are mounted on DIN rails. By connecting several timers in series it is possible to set up a switching sequence. The time range of Schrack Technik timers can be set between a few milliseconds and 100 hours. The classic delayed-on or delayed-off function is best realised with a monofunction timer from Schrack Technik.