This changeover relay from Durite operates on a +12V input signal and has an adjustable delay time (either a delay before ON or a delay before OFF) that the user can configure to meet the requirements of their application.

The relay operates in one of two modes:

• DELAY OFF - a momentary +12V input is given (e.g. from a momentary switch), the relay energises and there is a delay before the relay de-energises. Note: If a continuous rather than momentary input signal is provided, the timer will commence when the signal is removed.
• DELAY ON - a continuous +12V input is given (e.g. from an ON/OFF switch), there is a delay and then the relay energises (the relay de-energises when the input is removed)

In both modes the delay time is adjustable between 0.5 seconds and 6 hours, making this relay extremely versatile. The adjustment is made by removing the plastic plugs on top of the relay to access the dials beneath. The adjustment settings are shown in the table below:

Important: If the intended load draws more than 10A then this relay should not be used to directly switch the load. In this case the output should be used to switch the coil of a secondary relay that has a sufficient current rating and is fitted with a voltage suppression resistor or diode (e.g. P00694). This voltage suppression is important to prevent voltage spikes damaging the timer relay electronics.

Please note that due to the electronics used in this relay it is not possible to use it to switch the negative side of the circuit.