Flexible, 7 day, fully programmable electronic control with battery reserve, 4-pin base. Allows up to 48 ON and 48 OFF operations per day (96 operations per day) and automatically allows for the changes between British Summer Time (BST) and Greenwich Mean Time (GMT). General purpose timeswitch for heating, ventilation equipment control applications etc. FEATURES 7 day programme4-pin digital time switchUp to 48 ON and 48 OFF (96 operations per day).Each day can be programmed independently SPECIFICATIONS Mounting Surface MountingCurrent Rating 20A resistive for SPSTSupply 230V, 50 / 60 Hz a.c.Base Type 4-pinReserve Rechargeable battery will retain memory for typically 20 daysTemp Override Facility (Manual Button) Two hour boost – when programme “OFF”, Advance to “OFF” when programme “ON” and will remain “OFF” until next “ON” operation.Cable Size 6.0mm2Timing Accuracy Better than five minutes per annumHoliday Mode Suspends programs for 14 days, or indefinitelyBST/GMT Changeover AutomaticAmbient Temperature Range Designed to operate over a temperature range of 0°C to 35°C continuousLive Parts Protection This timer is totally protected by its enclosureDirt Protection Normal domestic dust deposits onlyMoisture Protection Ordinary: has no special protection against moistureShock Protection Class 11 (both functional and supplementary insulation)Period Between ON/OFF Operations 15 minsConforms to BS EN60730Dimensions Height (wall mounted) 136mm, width 105.7mm, projection 82mm, (Total height 146.5mm) WIRING Live In (Load)– External link 1 to 3 if using a single 230Vac supply Live Out (Load) Live In (Clock) Neutrals 4-pin switches have independent clock and switch connections which enable a different AC switching circuit voltage to be controlled from that of the 230V required to run the clock (e.g. switch a 110Vac machine). You can also isolate the switching circuit independent of the supply to the clock. DOWNLOADS E855 Datasheet [PDF] E855 Instructions [PDF] YouTube Video Guides
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