the SL1882-SP plate heat exchanger controller adjusts the temperature in the cabinet by collecting the temperature in the cabinet and controlling the internal circulation fan to keep the temperature in the cabinet within a specific range. Integrate a variety of fault detection and alarms to meet control requirements. the control board is fully designed in accordance with industrial standards and integrates multiple protection circuits with strong anti-interference ability. 
1. NO is the normally open contact of the relay, NC is the normally closed contact of the relay, and COM is the common terminal.
2. the rated index of the relay is 277VAC/10A or 125VDC/12A. this index refers to the resistive load carrying capacity. In actual engineering applications, it should be derated by at least 30%.