Tecnologic W09Y HRRR compact wall-mounted controller for freezing with three relays

The Tecnologic Model W09Y is a digital controller with a microprocessor that is typically used in cooling applications with ON/OFF temperature control. Defrosting is accomplished by stopping the compressor, electric heating or hot steam. Termination of defrost is controlled by interval or by reaching temperature. The instrument has up to 3 relay outputs, up to 3 inputs for PTC or NTC temperature probes, a digital input (alternatively for temperature input) and can also be equipped with a buzzer for alarm signalling. Outputs can be set to control a compressor or device controlling temperature, defrost, fan or alternatively as an auxiliary output or alarm. Temperature probe inputs are provided for temperature measurement, evaporator, product or auxiliary temperature control. Alternatively, the digital input can be programmed for various functions such as a door open signal, defrost command, to select a different temperature, as an external alarm signal, to activate a continuous cycle, to activate an auxiliary output, etc.