The ESD5550E Speed Control Unit is an all electronic device designed to control engine seed with fast and precise response to transient load changes. This closed loop control, when connected to a proportional electric actuator and supplied with a magnetic speed sensor signal, will control a wide variety of engines in an isochronous or droop mode. It is designed for high reliability and built ruggedly to withstand the engine environment.

Simplicity of installation and adjustment was foremost in the design. Non-interacting performance controls allow near optimum response to be easily obtained.

The primary features of the Speed Control Unit ESD5550E are the engine STARTING FUEL and SPEED RAMPING adjustment. The use of these features will minimize engine exhaust smoke experienced prior to attaining engine operating speed.