ESD5550/5570 Series | Speed Controls

The GAC ESD5550/5570 Series speed control unit is an all-electronic device designed to control engine speed 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, controls a wide variety of engines in an isochronous or droop mode. It features multi-V DC operation, Starting Fuel and Speed Ramping adjustments to minimize engine exhaust smoke prior to reaching operating speed, adjustable droop and idle operation, soft coupling, and lead circuit. It includes auxiliary input and a +10 V DC supply for accessories used in multi-engine or special applications, along with protection against reverse battery voltage, transient voltages, accidental short circuit of the actuator, and fail-safe design in the event of loss of speed sensor signal or battery supply. It is built with a hard-potted design to withstand the engine environment.