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Product Code: E312
The E312 is a mains powered single-shot plant extension timer designed to control plant equipment such as heating, lighting or air-conditioning systems outside of normal occupancy hours. Suitable for installation into a single-gang UK pattress/back box or a control panel, it provides a voltage-free changeover relay output capable of switching loads of up to 16A (4kW) which is activated for a selectable time period.
The E312 is extremely user-friendly with a single touch-sensitive pushbutton used to select the required extension between 1 and 6 hours (selectable in stages of 1 hour). The plant extension timer has 6 LED indicators to indicate the remaining extension time period and a single LED to illustrate the status of the output relay. The extension LEDs also have a very low level background illumination which enables the unit to be easily located and controlled in poorly lit areas.
A remote switch input feature is provided so the extension timer can be activated by a remotely located switch or other timer. The E312 timer runs when the remote input contacts are closed or is paused when the contacts are open, thus enabling multiple E312 units to be linked together to add a delay before the extension period, or to provide activation from a remote location.
The E312 also provides the functionality to pre-set a maximum extension period via an internal thumbwheel to ensure that the end-user cannot select an extension period longer than the authorised user so desires.
Typical applications:
Plant Extension Timer Variants:
24 Volt (/24V)
Powered by 24 volt (AC or DC) supply.
The E312 is also available with the following extension time variations:
E312/1hr – 10 to 60 minutes (adjustable in 10 minute steps)
E312/3hr – 30 minutes to 3 hour (adjustable in 30 minute steps)
E312/12hr – 2 to 12 hours (adjustable in steps of 2 hours)
E312/24hr – 4 to 24 hours (adjustable in steps of 4 hours)
* we can also accommodate to your specific time parameters with the E312. Please contact us to discuss your requirements with one of our design engineers.
*For a full description please see relevant variation below.
Download product datasheet (1840Kb)
£38.50 (ex. VAT)
Product Code: E312/12hr
Our plant extension timer will operate HVAC equipment outside of normal system operating times. Touch sensitive buttons and intuitive functionality make it easy to use and operate. A remote start facility is included as standard which means that the extension will not commence until a signal is received. read more
Product Code: E312/1hr
Our plant extension timer will operate HVAC equipment outside of normal system operating times. Touch sensitive buttons and intuitive functionality make it easy to use and operate. A remote start facility is included as standard which means that the extension will not commence until a signal is received. read more
Product Code: E312/24hr
Our plant extension timer will operate HVAC equipment outside of normal system operating times. Touch sensitive buttons and intuitive functionality make it easy to use and operate. A remote start facility is included as standard which means that the extension will not commence until a signal is received. read more
Product Code: E312/24V
Our plant extension timer will operate HVAC equipment outside of normal system operating times. Touch sensitive buttons and intuitive functionality make it easy to use and operate. A remote start facility is included as standard which means that the extension will not commence until a signal is received. read more
Product Code: E312/3hr
Our plant extension timer will operate HVAC equipment outside of normal system operating times. Touch sensitive buttons and intuitive functionality make it easy to use and operate. A remote start facility is included as standard which means that the extension will not commence until a signal is received. read more
Product Code: E314
The E314 is a single-shot programmable extension timer with delay which is designed to control part, or all of a heating, lighting or air-conditioning system outside normal occupancy hours. A voltage-free 16A relay output is switched on for a configurable time period after a delay period has elapsed, thus enabling plant equipment to be automatically… read more
Product Code: E315
The E315 is a single-shot extension timer designed to control part, or all of a heating, lighting or air-conditioning system outside normal occupancy hours. It is housed in a single-gang British Standard faceplate form factor with touch-sensitive pushbuttons and LED displays. read more
| Power Supply | 220V – 240V AC, 50Hz |
| Output switch rating | 16A, 250V AC (resistive) |
| Output switch type | Changeover relay (volt-free) |
| Operating temperature | -10°C to +40°C |
| Suitable for | 20mm (or deeper) single-gang UK pattress box |
| Extension period | 1 hour to 6 hours (1 hour steps) |
| Guarantee | 5 years |
| Weight | 89g |
| Dimensions | 86mm x 86mm x 26.9mm |
Product Code: MSD-154
A set of 2 replacement tamperproof screws (raised-countersunk M3.5 x 25mm) that are compatible with all our electrical faceplate style products, as well as other products which use a British Standard faceplate form factor. read more
Product Code: MSD-200
A 32mm surface-mounted British Standard pattress box, ideal for use when retrofitting our ranges of wall mounted extension timers, humidistats and time delay switches. read more
out of stock - call us for availability
Product Code: TDS3
The TDS3 time delay switch provides timed control for lighting, heating and ventilation loads. They are simple to install and easy to operate. The 3-wire switch requires a Neutral and Live connection (but does not require a minimum load to be connected) and can be used either to replace an existing light switch, or on… read more
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