Siemens DDC 540-100 Terminal Box Controller

The Siemens DDC 540-100 Terminal Box Controller is a component that operates local airflow and temperature control capabilities in the building automation equipment. In HVAC systems, it takes sensor input and provides output signals to actuators or dampers to control setpoint conditions. It is designed to be used in direct digital control, and it has the capability of providing precise modulation and stable operation. It is installed in a terminal box or control enclosure to assist in maintaining balanced air distribution, zone control, and coordination of operation of airflow regulation in the system.