[acropolite (Phil)]

The dew controller side of the unit consists of 4x RCA sockets, standard for dew straps, a 3 way toggle switch (spring loaded centre home position), LEDS and a power connection for 12V (centre positive).
The dew controller operates in a simple manner, pushing the toggle to the right selects a controller output, once an output is selected pushing left toggles the controller output to one of 4 preset levels or off. If there is no load, or your dew strap is open circuit, the level leds flash to indicat a fault. The 4 level presets are adjustable in software, e.g. level 1=10%, 2=25%, 3=50% , 4=100%. Once you set your preset levels they're set in non volatile memory, the unit then basically performs in stand alone mode.

Here's an image of the controller side, the silver button in the centre of the motor is the inbuilt temp sensor.