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

Designed as a two-wire SPST controlled device

allowing the system to exit or enter the defrost mode based on the actual coil temperature

For proportional or 0-10VDC applications

While designed as an OEM Aaon part

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