GAC EEG7500 User manual

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Governors America Corp. © 2021 Copyright All Rights Reserved
EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
EEG7500
Enhanced Electronic Speed Controller
1INTRODUCTION
GAC’s EEG7500 enhanced electronic speed controller is designed to regu-
late engine speed on diesel and gaseous fueled engines. When paired with
a GAC actuator the EEG is a suitable upgrade for any mechanical gover-
nor system that needs exibility, precision, or accurate control of governed
speed. The EEG7500 is designed for industrial engine applications from
generator sets, mechanical drives, pumps, and compressors to o󰀨-road mo-
bile equipment. Conguring is easy with GAC’s free GACong Tool software.
The EEG7500 supports:
Flexible actuator compatibility including bidirectional actuators with or
without actuator position feedback signal, bi-directional torque motors,
and Bosch-style throttle bodies.
Fully congurable digital and analog inputs and outputs
Inputs: 5 analog, 2 digital
Outputs: 1 analog, 3 digital
0 - 5 V DC, 4 - 20 mA, 0 - 10 V DC ±3 V Input Ranges
Speed Sync using CAN bus
Virtual Input/Output Routing
Feedback Speed Control Mode
Variable Speed Capability
Fuel Curve
EEG7500 supports three operating modes:
Non-Feedback Speed Control (NFSC) provides standard PID governing function for use with proportional actuators. No position
feedback sensor is required. PID (Proportional, Integral, Derivative) governor functions are optimized for best response and control
of the requested engine revolutions per minute (RPM).
Positioner Mode (PM) provides actuator positioning control and is used with proportional actuators or bidirectional (torque motor)
actuators. A position feedback sensor is required. PID positioner functions are optimized for best response and control of the
requested actuator position.
Feedback Speed Control (FSC) combines NFSC and PM modes for use with proportional or bidirectional (torque motor) actuators.
A position feedback sensor is required. The Speed PID position request is the input to the Positioner loop, the Position PID
optimizes response and control of the requested actuator position.
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PERFORMANCE
Isochronous Operation ± 0.25 %
Governed Speed /
Sensor Frequency Range 100 - 12 kHz
Droop Range Up to 25 % regulation
COMPLIANCE / STANDARDS
Agency CE and RoHS Requirements
Communications USB, RS-232-C, SAE J1939
PHYSICAL
Dimension See Section 3, Controller Installation
Weight 18.4 oz [0.52 kgf]
Mounting Any position, vertical preferred
RELIABILITY
Vibration 10 - 2000 Hz @ 7 g, per SAE J1455
Shock 20 g, 11 ms per SAE J1455
Testing 100 % Functional Testing
LED
Solid Green Ready. Controller is powered on.
Blinking Green Warning. Engine service due, or other. Dis-
played in GACong Tool System Status.
Unlit No power.
INPUT / OUTPUT
Supply 12 - 24 V DC Battery systems
(6.5 to 32 V DC)
Polarity Negative Ground (Case Isolated)
Power Consumption 200 mA continuous plus actuator current
400 mA with excitation at MAX load current
Speed Sensor Signal Input 1.0 - 60.0 V RMS
Actuator Output 10 A Continuous
Load Share /
Synchronizer Input
0 - 10 V DC (5 V Nominal, Selectable
Polarity, 145 Hz / V Sensitivity)
or 0 V ± 3 V DC
Reverse Power Protection Protected to -40 V DC
Transient Voltage Protection 60 V DC
Digital Switch Output(s) Rated to 2 A DC
ENVIRONMENTAL
Ambient Temperature -40 to 85 °C [-40 to 180 °F]
Relative Humidity up to 90 % Non-Condensing
at 38 °C [100 °F] (per SAE J1455)
Salt Spray ASTM B117
All Surface Finishes Fungus Proof and Corrosion Resistant
EEG7500 SPECIFICATIONS

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
3EEG7500 CONTROLLER INSTALLATION
The following connectors are required when using the EEG7500.
ITEM NO. PART NUMBER DESCRIPTION NOTE
1EC02-01-0097 PLUG, 4 POS Included
2EC02-01-0094 PLUG, 11 POS, Included
3 EC12-04-0016 USB COVER Included
4 EC02-01-0098 PLUG, 12 POS Included
EEG7500 CONNECTORS
Mount in a cabinet,
engine enclosure, or
sealed metal box. En-
sure adequate ventila-
tion for cooling.
Do not mount directly on
engine.
Vertical orientation
allows for draining
of uids in moist
environments.
Avoid extreme heat.
Do not mount next to
turbocharger, exhaust
manifold, or other high
temperature equip-
ment.
Dimensions [mm] in
Use an overspeed shutdown device, independent of the governor system, to prevent loss of engine
control which may cause personal injury or equipment damage.
Do not rely exclusively on the governor system electronic actuator to prevent overspeed.
A secondary shuto󰀨 device, such as a fuel solenoid must be used.

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
4EEG7500 CONTROLLER WIRING
TERMINAL DEFINITION CONNECTION GAUGE FIXED SPEED VARIABLE SPEED POSITIONER
AActuator (+) Actuator 16 REQUIRED REQUIRED REQUIRED
B Actuator (-) 16 REQUIRED REQUIRED REQUIRED
C Battery Ground (-) 12 or 24 V DC Battery 16 REQUIRED REQUIRED REQUIRED
D Battery Power (+) 16 REQUIRED REQUIRED REQUIRED
1 Magnetic Pick-up (+) Magnetic Pick-up magnetic
speed sensor input is not
polarity sensitive. Follow
Recommendation 3 in this
table.
20 REQUIRED REQUIRED
2
Magnetic Pick-up (-) 20 REQUIRED REQUIRED
3
Digital Input 1 Switch or jumper wire to
Terminal 5
20 REQUIRED with
more than 2 speed
settings
REQUIRED with Idle
speed setting used
REQUIRED with
position select
4
Digital Input 2 Switch or jumper wire to
Terminal 5
20 REQUIRED with
3 speed settings
used
REQUIRED when
using additional xed
settings
REQUIRED when
using additional
positions
5
Digital Ground
(GND)
20 REQUIRED when
Terminals 3 and 4
used
REQUIRED when
Terminals 3 and 4
used
REQUIRED when
Terminals 3 and 4
used
6Analog Ground
(GND)
20 REQUIRED REQUIRED
7
Analog Input 1 0 - 5 V DC, potentiometer
or 4-20 mA
(200 Ω resistor required)
20 REQUIRED REQUIRED IF
using POSITIONER
mode (Position 4)
8
Analog Input 2 0 - 10 V DC (5 V Nominal)
OR ±3 V DC (0 V Nominal).
Selectable polarity.
20
9 Analog Input 3 4 - 20 mA 20
10 Analog Input 4
0 - 5 V DC (4 - 20 mA with
200 Ω external resistor)
20
11
+ 5 V Excitation 20 REQUIRED with
potentiometer on
Terminal 7
REQUIRED with
potentiometer on
Terminal 7
12 + 5 V Excitation Actuator Position
Feedback Sensor
20 REQUIRED with
POSITIONER Mode
(POS)
REQUIRED with
POSITIONER Mode
(POS)
REQUIRED
13 Analog Input 5 REQUIRED
14 Analog Reference
Ground
REQUIRED
15 Analog Output 0 - 5 V DC
(25 mA MAX)
20
16 Digital Switch
Output 1
Switch output 2 A MAX 20
17 Digital Switch
Output 2
Switch output 2 A MAX 20
18 Digital Switch
Output 3
Switch output 2 A MAX 20
19 CAN Low J1939 BUS, Non Terminat-
ed. Follow Recommenda-
tion 3 in this table.
20
20 CAN High 20
21 RS232
Ground Reference
20
22 RS232 TX 20
23 RS232 RX 20
RECOMMENDATIONS
1.
Use shielded cable on all external connections to the EEG7500 controller. Ground one end of each shield, including the speed sensor
shield, to a single point on the EEG case.
2. Ground controller case to battery (-)
3. For magnetic pickups and CAN bus, use twisted wires at 14 turns per foot in wire length.
The following wiring connections are available in the EEG7500. Items highlighted are the minimum connections required before starting.
Read this entire manual before wiring components to the engine. For information on using the EEG7500 out of the box, see Section 8,
Getting Started, in this manual.

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
WIRING FOR FEEDBACK SPEED CONTROL AND NON-FEEDBACK SPEED CONTROL MODE
4EEG7500 CONTROLLER WIRING (CONTINUED)

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
WIRING FOR POSITIONER MODE
4EEG7500 CONTROLLER WIRING (CONTINUED)

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Governors America Corp. © 2021 Copyright All Rights Reserved
EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
Terminals 5 and 6: Digital and Analog Ref
Terminal 7 : Analog Input
Terminal 7 is the analog input from external trim or variable speed potentiometers.
Speed trim uses a potentiometer to vary the engine speed remotely.
The GACong Tool Speed Trim parameter lets you adjust speed trim ±10 % based
on the minimum and maximum voltage congured for the variable speed input. Trim
speed logic is used with xed speed settings.
Terminal 5 is the digital ground. Terminal 6 provides the internal ground for use with external trim or variable speed potentiometers.
An external switch can be added between Terminals 3 and 4 to Terminal 5 to select assigned xed speed settings using the GACong Tool
Terminals 1 and 2: Speed In / Speed Ref - Magnetic Speed Pickup Signal
Wires must be twisted and/or shielded for their entire length (14 turns per foot).
Gap between speed sensor and gear teeth should be > 0.02 in [0.51 mm].
Speed sensor voltage should be at least 1 V AC RMS during crank.
If the EEG7500 detects no input from the magnetic (mag) pickup, the EEG will set the actuator to 0 V DC
and set the speed to 0 RPM.
Terminals A and B: Actuator Connection
Use Terminals A and B for bidirectional devices such as torque motors which require specic polarity settings. Proportional actuators
are not polarity sensitive. See your specic actuator manual for details.
Terminals C and D: Battery Connection
Connect the engine battery to the Terminals C and D.
Terminals 3 and 4: Digital Input 1 and 2 - Speed Input Routing
Terminals 3 and 4 are digital inputs that can be used for digital, analog, or virtual (J1939) discrete or analog for mats. An external switch
can be used between Terminals 3 and 4 to Terminal 5 to select assigned xed speed settings. From the Physical Input mapping box on
the Input Conguration tab, set the Run/Stop Input signal to ON from the GACong Tool.
The auxiliary (AUX) terminal accepts input signals from load sharing units, auto
synchronizers, and other governor system accessories. The AUX input enables or
disables the load sync input. GAC accessories connect directly to this terminal.
The AUX function decreases engine speed with increasing input voltage, while the
polarity shift function increases engine speed with increasing input voltage.
To decrease speed set above 5 V DC; set below 5V to increase speed. The AUX
input is a 0 - 10 V DC reverse polarity signal used to parallel to the mains, or load
share multiple generators together.
The AUX input also enables or disables the load sync input.
To use the AUX input at AI4, select Auxiliary Enable in the GACong Tool
Advanced Governor Settings menu. Select the desired Auxiliary Polarity in the Aux
/ Load Sharing box.
The AUX default input is nominally 5.0 ± 5.0 V DC. A ± 3.0 V DC range can be
selected from the Adjustments menu in the Adjustments tab of the GACong Tool.
Activate the auxiliary input function by selecting Auxiliary Enable in the Aux / Load
Sharing box on the Advanced Governors Settings menu of the GACong Tool.
Select the desired Auxiliary Polarity from the drop down box.
Terminal 8: Analog Input 2: Auxiliary Input
4EEG7500 CONTROLLER WIRING (CONTINUED)
A 15 A fuse and power switch must be installed on the positive battery lead going to Terminal D.

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
Terminals 12, 13 and 14: Position Feedback Sensor
Actuator position feedback sensor is required for Feedback Speed Control
and Positioner modes, but not for Non-Feedback Speed Control mode.
Terminal 12: 5 V Supply to Position Feedback Sensor
Terminal 13: 0 - 5 V DC Actuator Position Signal
Terminal 14: Position Sensor Ground Ref.
Terminal 15: 0 - 5 V Analog Output
Terminals 16, 17 and 18: Digital Output 1, 2, and 3
Terminals 19 and 20: CAN and Terminals 21-23: RS232
Supports CAN SAE J1939 Protocol or RS-232 communica-
tions.
The CAN bus must be terminated at both ends by a 120 Ω
resistor Termination resistance should be set in parallel (60 Ω),
2 X 120 Ω.
Terminal 19 = CAN Low, Terminal 20 = CAN High.
Terminals 21-23 = RS232.
Terminals 9 and 10: 4 - 20 mA Input and 0 - 5 V DC Input
Terminal 9, Analog Input 3, provides dedicated 4 - 20 mA input signal. Current versions of the GACong Tool may mistakenly label this
as 0 - 5VDC. This is incorrect. It should show a permanent setting of 4 - 20 mA.
Terminal 10, Analog Input 4, provides dedicated 0 - 5 V input signal, or 4 - 20 mA with external 200 Ω resistor.
4EEG7500 WIRING (CONTINUED)
Terminals 16 - 18 support 3 discrete digital outputs. Each digital output’s
polarity is congurable using the GACong Tool.
Terminal 15 supports one 0 - 5 V DC analog output.
Terminal 11: +5 Volt Power Supply
Terminal 11 provides +5 V DC excitation, power to potentiometers or oth-
er equipment requiring power. See GAC Governor System Potentiometer
list on the GAC website.
Potentiometer Terminal EEG7500 Terminal Location
111 +5V
2 7 Analog Input
36 Ref. Ground

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
5THE GAConfig TOOL
1. Download the EEG7500 interface tool .zip le from the GAC Download
page. Depending on your workplace the download installer ask for addi-
tional information. After installation the system will require a restart.
2. The zip le will be saved in the PCs default download area, unless you
tell it otherwise. Once downloaded, double-click the le name to start the
installation. You may need to double click again on the EEG7500 IT setup.
exe le to actually begin the installation.
3. The Welcome screen displays. Click Next. Note the default installation is
in the Governors America Corp program les area.
4. Click Next. Allow the installation to create a desktop icon. You can also
create a quick Launch icon. Click Next.
5. Click Next. The installation will create a Governors America Corp startup
folder location. Click Next. Click Install at the next screen. Click Finish
when complete. The GACong icon is placed on the desktop.
6. Connect the EEG7500 to the PC using a USB-A port and connect the
USB-B port on the EEG7500. Power for the controller comes from the
engine battery. Ensure the system is powered. Do not start the engine.
7. Double-click the GACong Tool icon on your desktop. On rst use, when
prompted, select EEG7500 from the drop-down list.
8. Connect the GACong Tool to the EEG7500 by clicking on the Connect
icon on the top left of the GACong window.
9. A pop-up dialogue window displays a drop-down list of available comm
ports. Select the appropriate port and click OK. If you are unsure of the
comm port, use the Windows Device manager to locate what device is
plugged in to which USB port.
10. The Connection Status indicator on the lower left corner of GACong Tool
window ashes yellow then turns green as the connection is completed.
The status bar displays Connected.
If the connection does not complete, a red Disconnected message displays.
Check your connections and note any error messages on the PC and try again.
INSTALLING GAC TOOL AND CONNECTING TO EEG7500
Power for the EEG7500 comes from the engine battery.
REMINDERREMINDER
EEG7500 speed controller uses the GACong Tool to update parameter values on the EEG7500 governor, adjust performance settings,
and view results. This PC tool provides a menu-driven user-friendly interface to update settings, and speed diagnostics and trouble-
shooting. The tool also allows you to set up multiple scenarios and save them for use later or for sharing with other sites using the
EEG7500.
The GACong Tool is downloaded from GAC’s website. The following is required to run the tool:
• A PC with at least Windows 7 or higher and at least one USB port
• An internet connection
• A 14 pin connector (GAC EC1502) or cable harness assembly (CH1520)

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
6USING THE GAConfig TOOL
EEG7500 digital controller uses the GACong Tool to enter parameter values, adjust performance settings, and view results.
Parameters are grouped by functionality at the main menu. The tool allows you to change controller parameters on the y. Initial setup is
completed from Engine Tuning on the main menu without the engine running, but powering the GACong Tool using the engine voltage.
Tool bar
Main
menu is
arranged
by
function
Connection
Status
displays con-
nection status
between
PC and the
EEG7500
Engine Status
displays
real-time
engine speed
and actuator
information.
Update parameter values by double-clicking the underline or existing value next to a parameter name. Type in the new value and
click the Enter key to save the change. A green check mark next to the change indicates the change was successful. No check or a
red or yellow warning icon indicates the change was not saved or caused a conict with another parameter setting.
For a short description of a parameter, hover the cursor over the parameter name and a description briey displays, or reference the
item in the Adjustment menu where a short description is available in its associated menu tab.
Errors and parameter information display when you change a value. Read all RED warning boxes error information, yellow
cautions, and other pop-up information. Setting some parameter values impact other parameter values, often displaying a caution.
One common message indicates the current Control Mode does not support the parameter changed.
The GACong Tool windows automatically re-sizes its window.
Some settings require a restart of the GACong Tool to take a󰀨ect. A reset or power cycle is required after changing the following
settings. The tool will automatically reset the unit for the user.
• Control Mode and H-Bridge Mode
While using the tool, note the far right screen engine status bar, showing Engine Status information.
Selecting STOP sets the engine speed to 0 RPM and shuts down the EEG7500 controller. It does not shut down the engine directly.

The Engine Status
bar displays
EEG7500 parameters
in real-time.
STOP
Engine Shutdown
sets the engine speed
to 0 RPM and shuts
down the actuator. It
does not directly shut
down the engine.

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EEG7500 Enhanced Electric Governor 1-2021-A6 PIB5115
6USING THE GAConfig TOOL (CONTINUED)
The main menu is divided by function. The Dashboard and Engine Status as well as the right hand Engine Status panel detail the current
engine status. The menus are:
Engine Tuning includes basic setup of initial and system safety settings including control mode (based on actuator type) overspeed,
ywheel teeth, fuel settings and acceleration rates. Engine Tuning also includes xed speed settings, PID (Gain, Stability, Deadtime)
tuning, Variable Speed setup. A fuel limiting table can also be built here.
Position Control sets xed and variable positioner settings, and allows a positioner table to be built.
Position Feedback Calibration allows for automatic or manual conguration of the feedback sensor.
Advanced Governor Settings include the auxiliary settings, droop, and speed trim.
 assigns analog and digital devices.
 assigns speed and position switches, and output devices.
Communication connects with output routing, diagnostic messaging and TSC1/J1939.
ENGINE TUNING
OUTPUT CONFIGURATION
Engine Tuning is the basic menu to store your engine startup and
tuning information.
Type of actuator: non-feedback (default) feedback, or positioner
(Control Mode)
Flywheel teeth, overspeed, fuel limit
Start fuel rate, Fuel ramp rate, starter cuto󰀨, acceleration and
deceleration
Fixed speeds
Variable speed settings
PID Tuning (Gain, Stability, Deadtime)
Lead circuit, Light force Governing, Speed anticipation
Fuel Limit Table
Output conguration allows the EEG7500 to connect to data
points from outside the system, most commonly from SAE
J1939.
ADVANCED GOVERNOR SETTINGS
AUX enable, aux polarity
Droop
Speed Trim
INPUT CONFIGURATION
Input conguration maps the hardware connections to the intend-
ed use of the actual hardware.
For example, if a potentiometer is wired to support Variable
Speed input, it would be wired at Terminal 7. The Analog Input
Mode should be set as Analog Input 1 to 0 - 5 V DC, and the
Variable Speed Input in the Physical mapping is set to Analog
Input 1.
Analog Input 3 is mistakenly labeled 0 - 5VDC in some GACong
Tool installations. This is incorrect. It should show as setting of
4 - 20 mA.
Conversion Formulas:
Hertz mAG PICKUP = (RPM x Flywheel Teeth)
60 s
RPM = (Hertz mAG PICKUP x 60 s)
Flywheel Teeth