Synchronous timer day 1 changeover contact 230V/50Hz 3TE Mechanical timer SENTRON 7LF5 for the time-controlled switching of electrical consumers, e.g. lighting or industrial control systems.The mechanical timers from Siemens are particularly robust.The 7LF5 timers are available as synchronous or quartz timers for DIN rail or wall mounting with different time ranges and with different auxiliary contacts.7LF timers - safety, convenience and energy saving.