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:

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

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.