Honeywell 301-EM-US3 Controller R-410A Designed as a two-wire SPST

Designed as a two-wire SPST controlled device

System Reliability: Minimizes thermocouple dropouts and ignition delays by providing a steady heat source for the flame sensor

Optimized Coil Sensitivity: Precision 24V control relay ensures reliable pull-in even during minor voltage fluctuations in the control transformer circuit

and recirculating pumps in complex Building Automation Systems (BAS)

Honeywell 301-EM-US3 Controller R-410A Designed as a two-wire SPSTThe Honeywell 301 EM US3 Controller is a central processing hub designed for mechanical room refrigerant gas detection and ventilation control. Built for wall mount applications, this unit effectively manages up to 20 remote sensors via Modbus RTU communication, ensuring comprehensive coverage of large mechanical spaces. It serves as the direct replacement for legacy models M 512426, VA301EM, and VA301EM 20, facilitating a seamless upgrade path for