Designed specifically for use on Thiess sites the Thiess spec latching light control module operates on 12/24V and is fitted to cranes to control the external warning lights (Red/Amber/Green) and to latch the red light after an alarm condition occurs. The unit comes with a pair of keys that can be used by site supervisors to reset the system after clearing an alarm condition as well as a built in test button and buzzer. The unit can control incandescent or LED lights by switching power or ground signals. The module can accept a wide range of inputs with programmable input polarities to cater for a range of input conditions. Outputs can be programmed to stay on or flash when activated. This unit makes satisfying the Thiess latching requirement of external lights a breeze.