The Tracer Programmable Control Module (PCM) working with Direct Digital Control Systems (DDC) for Modular and Penthouse Climate Changers (CLCH). Typical PCM applications include control of air handling equipment, Actuators, Transducers, Sensors, Pumps, Control Valves, and interfacing with Chillers and Boilers. The Tracer PCM series provides customized direct digital control and monitoring.