With dimensions of 32 x 74 mm, the H is a microcontroller suitable for medium and low temperature refrigeration systems. have Three relay outputs control compressor, fan and defrost (electrical defrost or hot gas defrost) respectively. It also provides NTC or PTC sensor input, the first channel is used to control the room temperature; the second channel can be placed on the evaporator to control the melting point Frost termination temperature and management fan; optional third probe, connected to HOT KEY terminal as condensing temperature alarm Signal or display temperature; digital input can be used as a fourth temperature probe. The HOT KEY output can be connected to the unit, converted to ModBUS-RTU by using the external module XJ485-CX protocol, can be connected to dIXEL's X-WEB series monitoring system and network. Programmable key via HOT KEY key to program the controller. The controller provides a fully functional configurable parameter table system that can be easily programmed by the user via keypad buttons operate