GAC’s Speed Control Units are precise speed controls designed and manufactured in various configurations to meet application requirements using the latest analog and digital control technologies. Reverse battery polarity and fail-safe protection in the event of loss of speed sensor signal or battery voltage is incorporated in every GAC Speed Control Unit. A wide variety of application needs can be satisfied with GAC’s constant or variable speed governing in isochronous or droop operation. All circuit boards are hard potted or conformally coated to be vibration and moisture resistant.

Digital Governors Digital Accessories Analog Governors Analog Accessories

Digital Speed Controls

GAC digital speed controls are solid state microprocessor based speed control units that offer precise (+/- 0.25%) speed control with fast response to transient load changes in isochronous and droop modes.

DIGITAL Speed Controls
EEG Series Enhanced Electronic Speed Control - Replaces the EDG5500/ Improved and Simplified PID / Complete Fault Protection & Logging / Aux Input / Variable Speed, Droop, and Isochronous Governing
EEG6500 (CE) Multi-VDC / Built-In Display / Terminal Strip / Gaseous or Diesel
EEG6550 Multi-VDC / Built-in Display / Gaseous or Diesel / With Speed Switch / Variable Speed 0-5VDC or 4-20mA Direct
EEG7000 Electronic Digital Governor with J1939 TSC1 Capability
EEG7500  Electronic Digital Governor 
EDG Series Electronic Speed Control - No Analog Drift - Selectable Isochronous or Droop Governing - Overspeed Sensing - Adjustable Starting Fuel Strategy - Black Smoke Reduction - Variable Speed Governing - GAC AUX/Load Sharing
EDG5500 (CE) Multi-VDC / Simple LCD User Interface / Fast Set-up With 5 Push Buttons, No Potentiometers 
EDG6000 (CE) Multi-VDC / Multiple PID Control for Full Tuning of Operating Range / IP67 Sealed Case and Connector / RS232 and CAN J1939 Communications / SmartVU PC Software / 14-Terminal Mating Connector Not Included
 IGA225S-12 or -24
(CE) 12 or 24VDC / ADC225S with Integrated EDG6000 / Requires EC1502 or CH1520 (Not Included)
SDG Series - Smart Digital Speed Control / Three Fixed and 1 Variable Speed / Overspeed Shutdown Protection / SmartVU PC Software
SDG514-01-01 Multi-VDC / Deutsch Connector without Mating Connector / Resistive Variable Speed Input 5kΩ
SDG524-01-01 Multi-VDC / Deutsch Connector without Mating Connector / Voltage Variable Speed Input 0-5VDC
SDG725-01-01  Multi-VDC / SMARTTOUCH Keypad / Fixed & Variable Speed / Droop 
DPG Series -  Digital Speed Control & Pump-Mounted Actuator for Shangdong Kangda BQ Series Pumps - SmartVU PC Software
12 or 24VDC / DPG Series Actuator and Governor Combination (Foton / Forward Calibration is DFT)  - Also available is DPG101-RP which is the electronics only replacement kit. 

Analog Speed Controls

The ESD, ESC, and ECC Series speed control units are 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 or generator voltage, 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.

ANALOG Speed Controls
ECC Series - Genset Voltage Frequency / Isochronous Speed Control / Full PID Setting / Designed to Govern from Frequency Signal of an AC Generator / No Magnetic Speed Pickup Needed
ECC328-12 or-24 (CE) 12 or 24VDC / Light Force
ESC Series - Electronic Speed Control / 12-32VDC / Wide Speed Control Units 
ESC61C-7 12-32VDC / Standard Unit / Military-Style Connector
ESC61C-17 12-32VDC / Variable Speed / Military-Style Connector
ESC63C-7 12-32VDC / Standard Unit / Terminal Strip
ESC63C-17 12-32VDC / Variable Speed / Terminal Strip
ESC63C-23  12-32VDC / Idle-Run Feature / Terminal Strip
EC1200 Mating Connector / Straight / ESC61C Units
ESD1000 Series -  Isochronous Operation / Gain Adjustment / Hard Potted
ESD1000-12 or -24 (CE) 12 or 24VDC / Wire Leads
ESD1100-12 or -24 (CE) 12 or 24VDC / Terminal Strip
ESD2100 Series - Isochronous & Variable Operation / Adjustable Gain and Stability/ Speed Trim Input / Sheet Metal Case
ESD2110 (CE) Multi-VDC
ESD2200 Series - Isochronous Operation / Adjustable PID Functions / Speed Trim Pot / Hard Potted
ESD2210-12 or -24 (CE) 12 or 24VDC / Standard Unit
ESD2241-24 (CE) 24VDC / Standard Unit with Idle Circuit
ESD2244-12 or -24 (CE) 12 or 24VDC / Light Force (Low-Current Optimized PID)
ESD2300 Series - Variable Speed Operation / Adjustable PID Functions / Overspeed Speed Switch / Foot Pedal
ESD2351 12VDC / Operates with Williams Foot Pedal
ESD2352-12 12VDC / Operates with Morse Foot Pedal
ESD2400 Series - Isochronous Operation / Adjustable PID Functions / Idle Control / Anti-Windup Circuit / Hard Potted (Diesel or Gaseous)
ESD2401-12 or -24 12 or 24VDC / Designed for Non-Feedback GAC Actuators
ESD2402-12 or -24 12 or 24VDC / Light Force / Designed for Non-Feedback GAC Actuators
ESD5100 Series - Isochronous, Variable, & Droop Operation /Adjustable PID Functions / Variable Speed Trim / Switchable Droop and Idle Control / Auxiliary Power Supply /10 VDC Supply for Accessories 
ESD5111 (CE) Multi-VDC / Standard Unit
ESD5111T (CE) Multi-VDC / Temperature Compensated
ESD5119 (CE) Multi-VDC / EFC Reverse Acting (Normally Open)
ESD5120 (CE) Multi-VDC / Light Force / EFC Forward Acting (Normally Closed)
ESD5131 (CE) Multi-VDC / Switchable Soft Coupling and Lead Circuit
ESD5150  (CE) Multi-VDC / EFC Forward Acting 
ESD5159 (CE) Multi-VDC / Expanded Frequency Range 10.5kHz
ESD5160 (CE) Multi-VDC / EFC Reverse Acting / Extended Speed Range
ESD5161 (CE) Multi-VDC / Expanded Auxiliary Input Range
ESD5200 Series - Speed Anticipation Circuit / Adjustable PID Functions / Reverse Voltage Protection / Overspeed Contact
ESD5221 (CE) Multi-VDC / 10 Amp Relay Output / Overspeed Switch
ESD5300 Series - Isochronous, Variable, & Droop Operation / Dual Gain - Idle and Rated / Overspeed & Crank Termination / Speed Ramping / Starting Fuel Control / Power Drive Circuit / Adjustable PID Functions / Idle Speed Adjustment / Auxiliary Accessory Outputs / Unique Actuator Power Drive Circuit / Soft Coupling
ESD5330 (CE) 24VDC / Standard Unit
ESD5340 (CE) 24VDC / Full-Fuel Starting Aid
ESD5500-II Series - Suitable for Both Gaseous & Diesel Applications / Light Force & Standard Actuators / Selectable Dither Function / LED Indicators
ESD5500-II (CE) Isochronous, Droop & Variable Governing / Speed Ramping / Starting Fuel Control /Anti Wind-Up Circuit / Soft Coupling / Selectable Light-Force Capability / Dither Function
ESD5500E Series - Isochronous, Droop & Variable Operation / Idle Control / Speed Trim Capability / Starting Fuel & Speed Ramping Adjust /  Auxiliary Accessory Input & +10V Supply / Soft Coupling / Lead Circuit
ESD5500E (CE) Multi-VDC / Standard Unit 
ESD5520E (CE) Multi-VDC / Light Force 
ESD5522E (CE) Multi-VDC / Light Force / EFC Forward Acting / Enhanced Droop
ESD5526E (CE) Multi-VDC / Anti Wind-Up Circuit /
(For Use With ATB Gas Applications)
ESD5528E (CE) Multi-VDC / Anti Wind-Up Circuit /
(For Use With ATB Gas Applications)
ESD5550/5570 Series -  Isochronous,  Droop & Variable Operation / Starting Fuel  & Speed Ramping Adjust / Soft Coupling / Lead Circuit / Auxiliary Input & +10V Supply / Overspeed Contacts with Test & Rest
ESD5550 (CE) Multi-VDC / Standard Unit / Overspeed Switch
ESD5550M  (CE) Multi-VDC / Overspeed Switch / Expanded Gain and Stability Range / Replaces Ghana Controls
ESD5570 (CE) Multi-VDC / Light Force (Low-Current Optimized PID) / Overspeed Switch
SSW Series - Repeatability Set Points / 12 or 24VDC Operation / Overspeed Test Function / Tachometer Output
SSW674 Multi-VDC / One Element - Overspeed
SSW675 Multi-VDC / Two Element - Overspeed & Crank Termination
SSW676 Multi-VDC / Three Element - Overspeed, Crank Termination, & Parallel
Military Products
 ADG150  150 Series Actuator for Government 3Kw Tactical / Quiet Gen-Set

RSC671 10VDC (From Speed Control) / Variable Speed - Off-Road
RSC672 10VDC (From Speed Control) Fixed Speed
DDM101 24VDC / Drives 2 Identical Actuators Simultaneously (Diesel or Gaseous)
DFM100 Bi-Fumigation Module - Drives 1 Gaseous, 1 Diesel
LAM100 Hard Potted / Measures Generator Line Current Through CT & Signals Speed Control to Compensate / Adjustable Time Constant & Amplitude
Mating Connector
EC1200 ESC61C - Straight
Potentiometers - Sales Bulletin
TP501 1 Turn / 5K / With Knob
TP502 10 Turn / 5K / With Knob
TP503 10 Turn / 5K / With Locking Shaft
TP504 1 Turn / 20K / With Knob / Droop Control
TP508 10 Turn / 20K / With Locking Shaft
TP509 10 Turn / 20K / With Knob
TP510 10 Turn / 1K
TP511 10 Turn / 10K
TP521 10 Turn / 5K / Multiple Variable Speed Control / Vernier Dial
Test Equipment  
 TSE050 MSP / Engine Speed Simulator, Alligator Clips, General Usage