SL1500-SL dehumidifier controller Two compressor systems, under the temperature dehumidification control mode, the condensate valve PID control.
NO is the normally open contact of the relay, COM is the common terminal; 
the rated index of the relay is 250VAC/5A, 30VDC/5A. this index refers to the resistive load carrying capacity. In actual engineering applications, it should be derated by at least 30%;
3. the terminal load capacity is 10A, which is limited by the size and quantity of the relay.