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Governors America Corp. © 2021 Copyright All Rights Reserved

EEG7500 Enhanced Electric Governor   8-2021-A8      PIB5115

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Wires must be twisted and/or shielded for their entire length (14 turns per foot).

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Gap between speed sensor and gear teeth should be > 0.02 in [0.51 mm].

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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 are dedicated to actuator usage.  They provide input for bidirectional devices such as torque motors which require 

specific polarity settings.  

Proportional actuators are not polarity sensitive.  See your specific actuator manual for details.

Connect the engine battery to the Terminals C and D. 

Terminals 3 and 4 are digital inputs used to support incoming digital, analog, or virtual (J1939) signals. An external switch can also be 

used between Terminals 3 and 4 (Ground to Terminal 5) to select assigned fixed speed settings. 

From the GAConfig Tool set I/O Configuration 

 

Physical Input Mapping 

 Run/Stop Input - set to Digital Input 1 or 2 to match the 

external switch wiring.

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EEG7500

 WIRING DETAIlS

A 15 A fuse and power switch must be installed on the positive battery lead going to Terminal D.

 actuator connection: connector 1 - Terminals a and B 

 Digital Input 1 and 2 - Speed Input routing: connector 2 - Terminals 3 and 4

 magnetic Speed Pickup Signal: connector 2 - Terminals 1 and 2:  Speed In / Speed ref

 Battery connection: connector 1 - Terminals c and D

The EEG7500 provides broad configuration capabilities.  The wiring provides a dedicated actuator and mag pickup input as well as 

configurable analog and digital inputs to support direct communications like CAN (J1939) using the GAConfig Tool software. 

The EEG7500 supports analog and digital input connections and electrical connections to the EEG terminals.  These connections 

are then mapped to specific locations in the GAConfig Tool software where you add expected settings including speed and all related 

engine tuning setups in various speed modes (configurations).   

The output mapping is done for both input connections and for specific output results, for example meeting a specific speed might 

output a warning or shut down or engage a particular piece of hardware. 

For example, with an actuator installed, create a variable speed setup with GAConfig Tool. Setting the output of the actuator and the 

Speed Switch 1 output to a J1939 source such as the engine Electronic Control Unit (ECU) enables speed settings or vehicle miles to 

be monitored, sends warnings for things like past due oil changes, or shuts down the engine. 

Terminal 5 provides a 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 with ground to Terminal 5 to select assigned fixed speed settings using the 

GAConfig Tool

 Digital and analog Ground reference: connector 2 - Terminals 5 and 6: 

Terminal 7 is the analog input from external trim or variable speed potentiometer.  

Speed trim uses a 

potentiometer

 to vary the engine speed remotely.

The GAConfig Tool 

Speed Trim

 parameter lets you adjust speed trim ±10 % based 

on the minimum and maximum voltage configured for the variable speed input.  Trim 

speed logic is used with fixed speed settings.

 analog Input: connector 2 - Terminal 7

Summary of Contents for EEG7500

Page 1: ...ional 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...

Page 2: ...governor system to prevent loss of engine control Do not rely exclusively on the governor system electronic actuator to prevent overspeed A secondary shutoff device such as a fuel solenoid must be use...

Page 3: ...nal Selectable polarity 20 9 Analog Input 3 4 20 mA 20 10 Analog Input 4 0 5 V DC 4 20 mA with 200 external resistor 20 11 5 V Excitation 20 REQUIRED with potentiometer on Terminal 7 REQUIRED with pot...

Page 4: ...rs America Corp 2021 Copyright All Rights Reserved EEG7500 Enhanced Electric Governor 8 2021 A8 PIB5115 5 EEG7500 wiring DIAGRAMS continued Wiring for Feedback Speed Control and Non Feedback Speed Con...

Page 5: ...5 Governors America Corp 2021 Copyright All Rights Reserved EEG7500 Enhanced Electric Governor 8 2021 A8 PIB5115 5 EEG7500 wiring DIAGRAMS continued Wiring for Position CONTROL...

Page 6: ...dedicated actuator and mag pickup input as well as configurable analog and digital inputs to support direct communications like CAN J1939 using the GAConfig Tool software The EEG7500 supports analog...

Page 7: ...n box Polarity must be matched for all auxiliary products used with the EEG7500 Auxiliary Input Analog Input 2 Connector 2 Terminal 8 Terminal 9 Analog Input 3 provides dedicated 4 20 mA input signal...

Page 8: ...erminals 16 17 and 18 CAN and RS232 Connector 3 Terminals 19 20 and Terminals 21 23 An actuator position feedback sensor is required for the Control Mode Feedback Speed Control and Position Control bu...

Page 9: ...and connect the USB B port on the EEG7500 Power for the controller comes from the engine battery Ensure the system is powered a green LED displays on the EEG7500 8 Do not start the engine 9 Double cli...

Page 10: ...rmation yellow cautions and other pop up information Setting some parameter values impact other parameter values often displaying a caution One common message indicates the selected Control Mode does...

Page 11: ...h overspeed fuel limit Speed Configuration including Fixed speeds Variable speed settings Tuning Gain Stability Deadtime Lead circuit Light force Governing Speed anticipation Feedback Speed Control FS...

Page 12: ...outside the system such as speed switches and position switches setting a digital output mode mapping the output source to a specific event Physical output mapping sets a specific output to a specific...

Page 13: ...EEG7500 can be set up and used out of the box with an actuator attached using default settings Default settings are shown in section 17 Default Configuration This section details the initial installa...

Page 14: ...ridge Mode is set to Half Bridge but the actuator does not support half bridge 1 attempting to run the engine may harm the engine or actuator The information in the Initial Setup is based on using a N...

Page 15: ...ore Digital Output 1 Source should be set to Speed Switch 1 as shown in the Output Mapping Check the Override box to set the physical input to On or Off By combining settings you can map signals to sp...

Page 16: ...use automatic engine shut down Set this value low enough to prevent mechan ical damage but high enough to allow realistic load rejection speeds without stopping the engine Fuel Limit 0 100 100 Maximum...

Page 17: ...er EEG7500 1 11 2 7 3 6 ADDING A Potentiometer The shutdown STOP button available on the GAConfig tool shuts down fuel to the actuator but does not directly shutdown the engine To shut down the engine...

Page 18: ...ID Tuning section Stability is achieved by balancing PID Gain P Stability I and Deadtime D Gain Proportional changes the initial response of the governor Increasing gain makes the engine more responsi...

Page 19: ...ween 0 to 75 Set Input Maximum to at least 25 greater than the Minimum value Values entered which are not 25 different are automatically reset to the closest accepted value by the GAConfig Tool Variab...

Page 20: ...he Off selection At Speed Select B check Override and then check On 3 Note the Select Speed Mode is now 2 in Quick Access 4 Review the chart below for information on how the EEG7500 uses Speed Select...

Page 21: ...input parameters in I O Configuration Physical Input Mapping menu controls the actu ator position by a fixed amount each time a switch is closed and then opened again These inputs require the use of m...

Page 22: ...e dropdown menu on the Engine Tuning tab 2 In the Variable Position Settings box set the Variable Position Start and Variable Position End for the desired position control range The analog input signa...

Page 23: ...ng a 5 V Nominal 0 10 V DC and selectable response polarity In response the EEG can increase or decrease voltage to maintain constant engine speed Accessories tied to Aux must be shielded Light Force...

Page 24: ...s a controller to select the rpm corresponding to the analog voltage signal and commands the actuator accordingly It can also be used to set up position settings based on other data settings The table...

Page 25: ...sponds to J1939 speed requests with the J1939 speed control taking priority over speeds selected by Speed A and B selections J1939 DTC s are divided into two categories active and stored Active codes...

Page 26: ...00 ms SPN965 Number of ID fields SPN234 Software ID Number of ID fields fixed at 1 65266 Liquid Fuel Economy 100 ms SPN51 Engine Throttle Position SPN51 65241 Auxiliary IO 1 100 ms SPN701 AuxIO 1 SPN7...

Page 27: ...s 3 Click Start The data displays below 4 To save the data click the Save button The file is saved as a printable graphic png file 5 Select Reset Pan to move the cursor on the grid back to start posit...

Page 28: ...100 50 50 PID Gain to use when at the minimum speed while in variable speed PID Gain to use when at the Maximum speed while in variable speed Input Minimum 0 75 Must be 25 apart 0 Variable speed input...

Page 29: ...ensor Primary Redundant Redundant The current actuator position as determined by the feedback sensor input Position Feedback Low Position Feedback High Range 0 to 5 V DC Low 1 High 4 The voltage signi...

Page 30: ...NFC and NFSC mode Position A Input Position B Input Override Disabled Configures the input data signal routing for the operating mode Values are either fixed analog fixed discrete or mapped to a hardw...

Page 31: ...n variable speed mode Trim Range 0 120 rpm Trim for Speeds 1 2 3 Trim Increase Rate Trim Decrease Rate 0 120 rpm s Rate of change for trim SAE J1939 Configuration J1939 Address 0 Sets the CAN address...

Page 32: ...click Engine Shutdown then click System Reset 3 Check for power for the EEG7500 from the engine battery INSTABILITY SYMPTOM PROBABLE CAUSE OF ABNORMAL READING Fast Periodic The engine seems to jitter...

Page 33: ...wiring Actuator does not energize fully 1 Measure the voltage at the battery while cranking 1 If the voltage is less than a 7 V DC for a 12 V DC system or b 14 V DC for a 24 V DC system Then Check or...

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