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Electronic Timers and Push Buttons | ET-315-24 Extension Timer, 24VAC, Extension up to 99 Hours

Extension Timer, 24VAC, Extension up to 99 Hours

Datasheet (113kB)

The ET-315 is a programmable extension timer for energy saving building control. The ET-315 has a voltage-free 10A relay output that is switched on for a configurable time period (from 1 to 99 hours). The unit has an automatic power saving mode that will dim the LED displays after the unit has been inactive for two minutes. The ET-315 is mounted on a standard british single-gang wall mounting box.

The ET-315 is an user-friendly device with fully adjustable timings for each extension (in steps of 5 hour) and a pre-configurable maximum extension period via an internal settings. Therefore it provides simple yet powerful control of plant equipment when they are unmanned or when they require a temporary override to their regular control schedule.


  • 85-265VAC Power Supply (ET-315)
  • 18-28VAC/DC (ET-315-24V)
  • Extension Time Up To 99 Hours
  • Pre-configurable Maximum Extension Time (Steps of 5 hours)
  • Energy Saving Display Auto-Dimming
  • 10A 250VAC Change-Over Relay


  • Heating and lighting control
  • Fan control
  • Community Centres
  • Churches
  • Schools
  • Offices
  • Hired sports courts and rooms
  • Changing rooms
  • Meeting rooms
  • HVAC equipment
  • Immersion heaters
  • Security lighting