Proact Integrated Speed Control

The ProAct ISC can be base- or flange-mounted on-engine, and will withstand high levels of vibration and temperature. The output shaft is a 0.625-36 serrated tooth shaft. Four levels of output torque are available. The ProAct ISC will also mount directly to Woodward integrated throttle bodies. The control accepts a speed input signal from a variable reluctance speed sensor, commonly called an MPU. The control may also be user-configured as a positioner accepting an analog position command signal or a J1939 CAN demand signal. Future options will include a CAN open communication capability.

The ProAct ISC offers a wide variety of speed control features: Dynamics settings, dual rated speed setting, idle/rated speed setting, raise or lower speed modifier, analog input speed modifier, analog raise and lower speed modifier, droop, dual dynamics, analog outputs, and discrete outputs,

The control also allows isochronous load sharing, and monitors key internal and external signals, and annunciates any detected faults through a discrete output. An analog output provides actual position, and a discrete input is available to remotely shut down the control.

Additional features of the ProAct ISC include on-line and off-line diagnostics, current limiting based on driver electronics temperature, and service port communications. The control is field programmable, allowing a single design to be used in many different applications. It must be configured and calibrated to the specific engine with a personal computer (PC) and the ProAct ISC Service Tool that communicates serially to the control via RS-232 using Woodward’s DDE ServLink protocol. The ProAct ISC Service Tool can be downloaded from the Woodward website (