The ASCO Numatics ControlD is a stand-alone control device used for open-loop, closed-loop, or dual-loop (cascaded) process control. It is designed to control proportional valves by regulating the current to the valve´s solenoid coil. Control loop parameters can be customized for an application using DigiCom software (included). The device is suitable for the control of flow, pressure, temperature, and force.