The Alerton BACtalk VLC-550 (P/N: VLC-550-K-E) is a reliable and efficient HVAC and Building Automation controller designed for precise climate and equipment control. Manufactured by Alerton in Taiwan, this programmable board operates on the BACnet MS/TP protocol, ensuring seamless integration into compatible Building Management Systems (BMS). Featuring 5 universal inputs and 5 binary outputs, the VLC-550-K-E is an excellent choice for managing heat pumps, AC units, fan coils, and other terminal applications.