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If you need to switch something on or off some time after actually deactivating it, the use of a timer relay is a good choice. Timer relays are mounted on DIN rails. By connecting several timer relays in series it is possible to set up a switching sequence. The time range of Schrack Technik timer relays can be set between a few milliseconds and 100 hours. Timer must always be set in the de-energised state. There is a wide variety of timer relays available; for every application the suitable relay:
Multi-function timer relay, Series 6, ZR6MF052
• 16 functions
• 16 time ranges