The Woodward 2301 Electronic Control is an analogue proportional system of engine control. Early models were built in modules and installed on system assemblies. The system could feature load sharing, process control, temperature compensation and many other parameters.

The 2301A controls the speed or load of diesel or gas engines, steam or gas turbines. It is an improvement on the 2301 in that it isolates the power supply and enhances features of earlier controls and is available for forward or reverse-acting applications and can be used with single or tandem actuators.

There are low voltage (10-40Vdc) and two high voltage models (88-132Vac & 90-150Vdc).