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Thomson Power Systems Marathon MEC 20 Installation, Operating & Service Manual

Microprocessor engine/generator controller
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MEC 20
MICROPROCESSOR
ENGINE/GENERATOR CONTROLLER
(WITH REMOTE COMMUNICATION, EXPANSION OUTPUT MODULE &
EAP 110 REMOTE ANNUNCIATOR OPTIONS)
INSTALLATION, OPERATING &
SERVICE MANUAL
Software Version 1.81
PM047 Rev 12 03/03/04
th
Street, Langley, BC Canada V1M 3B1  Telephone (604) 888-0110
9087A – 198
Telefax (604) 888-3381  E-Mail: info@thomsontechnology.com  www.thomsontechnology.com

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  • Page 1 MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER (WITH REMOTE COMMUNICATION, EXPANSION OUTPUT MODULE & EAP 110 REMOTE ANNUNCIATOR OPTIONS) INSTALLATION, OPERATING & SERVICE MANUAL Software Version 1.81 PM047 Rev 12 03/03/04 Street, Langley, BC Canada V1M 3B1  Telephone (604) 888-0110 9087A – 198 Telefax (604) 888-3381 ...

  • Page 3: Table Of Contents

    REMOTE START CONTACT FIELD WIRING 2.10. REMOTE COMMUNICATION WIRING 2.11. EXPANSION OUTPUT MODULE LOCATION/INSTALLATION 2.12. MEC MOUNTING LOCATION/INSTALLATION 2.13. FACEPLATE MOUNTING DIMENSIONS 2.14. MEC 20 ASSEMBLY - SIDE VIEW 2.15. DIELECTRIC TESTING DESCRIPTION PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 4 EXPANSION OUTPUT MODULE OPTION EAP 110 REMOTE ANNUNCIATOR OPTION OPERATING INSTRUCTIONS 9.1. MEC 20 POWER-UP OPERATION SEQUENCE 9.2. MEC 20 DISPLAY MENUS 9.3. SEQUENCE OF OPERATION 9.4. CONTROL PUSH-BUTTONS PROGRAMMING INSTRUCTIONS 10.1. SECURITY PASSWORDS PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 5 DIGITAL FAULT PROGRAMMING MENU 10.6. CALIBRATION MENU PROGRAMMING SHEETS 11.1. SUMMARY CONFIGURATION DATA SHEET 11.2. MAIN CONFIGURATION 11.3. ANALOG FAULT PROGRAMMING MENU 11.4. DIGITAL FAULT PROGRAMMING MENU 11.5. CALIBRATION MENU SPECIFICATIONS CONNECTION DIAGRAM TROUBLE SHOOTING NOTES PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 6 MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER...

  • Page 7: Introduction

    High Fuel Level Low Fuel Press Bat Charger Fail Fail to Sync HighIntkManfTemp Added Independent Programming features for AMF Outputs  Added references for EAP 110 Remote Annunciator  Misc. Display & Menu changes  PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 8 1.2 97/06/04 Original version. 1.1.2. Operating & Service Manual Version Rev 12 03/03/04 Changed Oil pressure/resistance calibration data and new software version 1.81. Rev 11 02/09/09 Added descriptive information for new software version 1.8 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 9: General Description

    English, providing a user-friendly operator interface with many display options available. The microprocessor design provides high accuracy for all voltage monitoring, current monitoring and timing functions as well as providing many PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 10 • Discharge body static charge before handling the equipment (contact a grounded surface and maintain contact while handling the equipment, a grounded wrist strap can/should also be utilized). PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 11: Installation

    Wiring from the engine cranking battery to the control panel should conform to the following guidelines to avoid possible controller malfunction and/or damage. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 12: Speed Sensing Input

    Note: One common magnetic pickup may be utilized for the system provided specific test measurements are done with the equipment installed (i.e. mag pickup voltage levels meet the required levels). PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 13: Dc Voltage Inputs

    Refer to FIGURES #1 - 4 for voltage sensing connections. To display generator line to neutral voltage in a 3 phase 4 wire system, the neutral must be connected as shown. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 14: Ac Current Input

    CT polarity is not critical for correct circuit operation. Note: The CT secondary common conductors must be externally grounded for correct operation. CT’s must be rated for a minimum of 1.5VA output at the specified accuracy. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 15: Outputs

    2.8.3. Remote Start Contact for Transfer Switch #14 AWG (2.5mm 2.8.4. Crank & Preheat Output Wiring #14 AWG (2.5mm ) (To pilot relays) 2.8.5. Speed Sensing Wiring (1.5mm Conductor Shielded Cable 2.8.6. Metering Voltage Inputs #16 AWG (1.5mm PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 16: Remote Start Contact Field Wiring

    UPS systems, transformers, rectifiers etc. • Use separate, dedicated conduit runs for all communication cables. Do not tightly bundle communication cables together in the conduit. Conduit PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 17: Expansion Output Module Location/Installation

    FIGURE #5. 0.00 mm 152.4 mm 4 HOLES 4.75 MM DIAMETER (3/16" DRILL) 0.00 mm 7.62 mm 137.16 mm FIGURE #5 : MEC 20 EXPANSION MODULE MOUNTING DIMENSIONS G:\ENGINEER\PRODUCTS\MEC20\MEC20_14.VSD DRAWING SCALE .75:1 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 18: Mec Mounting Location/Installation

    The second method of controller mounting requires a factory supplied adapter faceplate as shown in FIGURE #8. This method only requires a single large rectangular hole to be cut out of the door as shown in FIGURE PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 19: Faceplate Mounting Dimensions

    1.25" ALLUMINUM STANDOFF (HEX) (#8-32 CLEARANCE #8-32 THREAD UNTHREADED) HIGH VOLTAGE MYLAR BARRIER #8-32 INTERNAL TOOTH LOCK WASHER (mounts on bottom right hand corner, as viewed from rear) G:\ENGINEER\PRODUCTS\MEC20_09.VSD Rev. 0 97/06/02 FIGURE #7 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 20: Dielectric Testing

    MEC 20 connected in the circuit as serious damage will occur to the controller. All AC control fuses connected to the MEC 20 must be removed if high voltage dielectric testing is performed on the control panel. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 21: Description

    The EXIT function is used to “exit” the programming menu by holding this button down for approximately 2 seconds while in the programming mode.  DECREMENT push-button. The DECREMENT function is used to PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 22 Refer to the operating instructions for detailed information. READY LED light viewing window. The READY LED illuminates when the engine-generator set is set for automatic operation and no shutdown or alarm faults have been activated. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 23: Printed Circuit Board

    MEC 20 CIRCUIT BOARD LAYOUT B+ B- GRD MP1 MP2 1 R115 RJ45 CONTRAST RJ45 WATCHDOG REMOTE START CRANK COM FAIL TB3 18 G:\ENGINEER\PRODUCTS\MEC20_02.VSD Rev. 2 01/07/09 DRAWING SCALE (mm) = .6:1 FIGURE #11 PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 24 3.2.2.2. REMOTE START This LED is illuminated whenever the MEC 20 has received a remote start signal. 3.2.2.3. CRANK This LED is illuminated whenever the MEC 20 is initiating an engine cranking signal. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 25: Fault Circuit Descriptions

    The third type is Analog Input Fault circuits that are initiated from external analog signal inputs. The following functional block diagram (FIGURE #12) shows how all input/output fault circuits are organized. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 26: Mec 20 Functional Block Diagram

    LABEL LIST – EACH POINT DIGITAL FAULT #8 PROGRAMMABLE PROGRAMMABLE DIGITAL FAULT #9 FUNCTION LIST DIGITAL FAULT #10 DIGITAL FAULT #11 DIGITAL FAULT #12 E. STOP EMERGENCY STOP G:\ENGINEER\PRODUCTS\ MEC20_10.VSD Rev. 3 02/02/20 FIGURE #12 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 27: Internal Fault Circuits

    The “Switch Not In Auto” fault circuit is initiated when the controller’s operating mode switch is changed from the auto position to any other position via the front mounted keypad. This fault is internally programmed PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 28: Digital Fault Input Circuits

    Note: Up to six custom ”user defined” fault label names may be specified for the MEC 20 controller at time of purchase. The six custom fault label names cannot be changed once shipped from the factory. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 29 Low coolant level shutdown in place of Battery charger input fail alarm. Refer to the programming instructions for further information on digital fault circuits. Note: Shutdown functions for Low Oil Pressure and High Engine Temperature may alternatively be provided via analog pressure and PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 30: Analog Fault Input Circuits

    Engine temperature High engine temperature #2 Shutdown Engine temperature Low oil pressure #1 Alarm Oil pressure Low oil pressure #2 Shutdown Oil pressure Overspeed Shutdown Engine speed Loss of speed signal Shutdown Engine speed PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 31 The MEC 20 controller provides an overfrequency sensor for generator supply. overfrequency sensor programmable for type of fault action (i.e. alarm or shutdown), frequency setpoint, and transient time delay settings. Refer to the programming instructions for further information. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 32 HIGH BATTERY VOLTAGE ALARM The high battery voltage alarm fault circuit is activated when the battery voltage rises above a pre-determined setpoint for a specified time delay. The high battery voltage alarm fault is PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 33 The high engine temperature shutdown fault is programmable for the level of temperature setpoint, transient time delay settings and other functions. Refer to the programming instructions for further information. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 34 4.4.6. ENGINE SPEED ANALOG INPUT The MEC 20’s engine speed sensor measures AC voltage and frequency from an engine mounted magnetic pick-up. The engine speed sensor provides information to perform the following control functions: PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 35: Control Output Contact Descriptions

    The crank output contact closes when a crank condition is activated and the contact will automatically open when crank disconnect speed is obtained and/or the generators output AC voltage exceeds 10% PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 36: Programmable Output Contacts

    HIGH ENG TEMP #2 SHUTDOWN EPS SUPPLYING LOAD 5.2.1. ENERGIZE TO STOP The designated programmable output relay will energize when a stop signal has been activated. The output will remain energized for 10 PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 37 5.2.7. PREHEAT The designated programmable output relay will energize during the start delay timer period and cranking period until the engine starts and reaches PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 38 The designated programmable output relay will energize when the engine ”RUN” (i.e. FUEL) energizes prior to the engine starting. The output will remain on until the engine has reached a “stop” or “shutdown” command. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 39 2) When both “Utility Ready to Load” and “Generator Ready to Load” programmable outputs are programmed and utilized in a AMF control configuration, the ATS Output is not utilized (i.e. engine start signal is internally generated). PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 40: Remote Communication Option

    Refer to separate literature for detailed information on the CIM module. The MEC 20 remote communication option must be ordered and be factory enabled prior to shipment. The communication feature cannot be user enabled once shipped from the factory. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 41 **Communication cable wiring must be suitably routed connector Computer to protect it from sources of electrical interference. Refer to installation section for further information. G:\ENGINEER\PRODUCTS\MEC20\MEC20_20.VSD FIGURE #14 MEC 20 WITH CIM MODULE & DIRECT CONNECTED PC PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 42 The network system may be connected to a local PC or to a remote PC via telephone system and CIM module. Refer to FIGURE #15 for a typical MEC 20 network system with CIM module. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 43 To additional MEC 20 controllers interference. Refer to installation section for further (maximum 10 total per network) information. G:\ENGINEER\PRODUCTS\MEC20\MEC20_22.VSD FIGURE #16 NETWORKED MEC 20 INTERCONNECTION DIAGRAM PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 44: Expansion Output Module Option

    FREQUENCY, OVERCURRENT, SPARE DIGITAL FAULT INPUTS #5-#12 AND PROGRAMMABLE OUTPUT #6 (I.E. MUST SPECIFY SECOND EXPANSION MODULE TO OBTAIN CONTACTS FOR THESE FAULTS). G:\ENGINEER\PRODUCTS\MEC 20\MEC20_15.VSD FIGURE #17 : EXPANSION OUTPUT MODULE CONNECTION DIAGRAM PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 45 JMP13 JMP14 JMP15 JMP16 RJ45 (IN) RJ45 (OUT) DIAGNOSTIC LED'S JMP 17 OFF - STANDARD C282/NFPA FAULTS ON - ADDITIONAL FAULTS G:\ENGINEER\PRODUCTS\MEC20\MEC20_16.VSD FIGURE #18: MEC 20 EXPANSION OUTPUT MODULE PRINTED CIRCUIT BOARD LAYOUT PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 46 C282 or NFPA 110 standard faults exclude analog faults Over/Under voltage, Over/Under Frequency, Overcurrent, spare digital inputs #5-#12 and programmable output #6 (i.e. must specify second expansion module to obtain contacts for these faults). G:\ENGINEER\PRODUCTS\MEC20\MEC20_17.VSD FIGURE #19 MEC 20 EXPANSION MODULE INTERCONNECTION DIAGRAM PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 47: Eap 110 Remote Annunciator Option

    **8 conductor Shielded Twisted Cable c/w RJ45 connectors. Communication cable wiring must be Cranking Battery suitably routed to protect it from sources of electrical interference. Refer to instruction manual for further information. FIGURE #20 : EAP 110 REMOTE ANNUNCIATOR CONNECTION DIAGRAM PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 48: Operating Instructions

    ENTER or EXIT push- buttons in succession until the desired screen or menu is displayed. The display screen types and order in which they are programmed are as follows: PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 49 The operating status screen may be momentarily replaced with a time delay countdown screen when a start or stop sequence is initiated. The display will automatically return to the previous menu following expiry of the timing sequence. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 50 9.2.3. TIMER COUNTDOWN MENUS Timer countdown menus are automatically displayed when a specific time delay function occurs during a control sequence. When a time delay PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 51 XXX SEC. NEUTRAL DELAY* XX SEC. ** Countdown screens only appear if Utility Gen Ready to Load outputs are programmed. 9.2.4. GENERATOR AC METERING Four generator AC metering screens are provided as described below. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 52 Displays generator frequency in hertz (HZ). The frequency is displayed with a resolution of 1/10 of a hertz. 9.2.4.2. GENERATOR KVA DISPLAY The generator’s total power output in kilo-voltamperes (KVA) is displayed. LCD DISPLAY 532.31 PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 53 “Yes”. LCD DISPLAY     Displays generator voltage Phase A to Neutral.  Displays generator voltage Phase B to Neutral.  Displays generator voltage Phase C to Neutral. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 54 1/10 of a hertz.  Displays unit operating hours 9.2.5. ENGINE PARAMETER DISPLAY Two engine operating parameter screens are provided as described below. 9.2.5.1. BATTERY VOLTAGE/ENGINE SPEED (tachometer) PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 55 Access to the programming sub-menus may only be obtained with a security password number. The sub menus are organized as follows: PROGRAMMING MENU PASSWORD PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 56: Sequence Of Operation

    ENGINE START DELAY timer will be initiated. Note: The start sequence will not be initiated if any shutdown fault condition is present. Once the engine start delay time expires, an engine RUN and CRANK PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 57 Note: A specific shutdown fault may be programmed with a definite time transient delay period that must expire before the shutdown is activated. The stop PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 58 NEUTRAL Delay timer is initiated. • Once the NEUTRAL DELAY timer expires the Gen Ready to Load output energizes to signal the transfer switch to transfer to the generator supply. Note: The neutral delay PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 59 “Utility Ready to Load” and Gen Ready to Load” outputs are programmed and used. • When the MEC Load Test pushbutton is pressed, the controller’s logic will internally simulate receiving a remote start input. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 60 To allow a timed No Load Test of the engine/generator set while using the AMF control application, a digital input contact from an external timer must be programmed for NO LOAD Test (Refer to Section 10.5.8 for programming details). PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 61 The engine will continue to run as long as the external exercise timer contact remains closed. • Once the external exercise timer contact opens, the engine will continue to run for its cooldown time as programmed, then it will automatically stop. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 62 ALL COMPONENTS SHOWN EXTERNAL TO THE MEC 2 / MEC 20 ARE OPTIONAL ITEMS 3 POLE CHANGEOVER SWITCH SHOWN FOR OTHER SYSTEM VOLTAGE APPLICATIONS, CONSULT TTI FACTORY AC COIL SPIKE SUPPRESSION DEVICES ARE REQUIRED G:\ENGINEER\PRODUCTS\MEC2\MEC2_10.VSD REV. 0 01/11/20 FIGURE 21 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 63: Control Push-Buttons

    “ATS Test” and a remote transfer switch interconnected with remote testing circuitry. In this position, a signal will be issued to a remote transfer switch to permit an automatic engine start and load transfer. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 64 The LED’s and LCD display will illuminate for approximately 2 seconds then return to their original status. Note: The emergency stop LED will not be activated by a software initiated test as it is controlled via independent hardware circuitry only. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 65: Programming Instructions

    YES prompt and push the ENTER button PASSWORD Use the INCREMENT or DECREMENT push-buttons to ramp the displayed number up or down to the desired password access number. Press the ENTER push-button when the correct number is displayed. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 66: Basic Programming Operation

    The EXIT push-button may be used to scroll backwards through the programming parameter loops. To change a programmed parameter, use the INCREMENT or DECREMENT push-buttons to scroll through the available options or to adjust a value up or PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 67: Main Programming Menu

    1. 10.3.2. SYSTEM VOLTAGE Set to nominal system voltage as expressed in “phase to phase” voltage (i.e. a 347/600 volt system would be entered as “600”). The programmable range of values is 120V-15,000V. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 68 Select the desired type of engineering units for the engine pressure display and analog setpoints as provided: Pounds per square inch (PSI) or Kilopascals (KPA). Note: Alarm setpoints do not automatically re-configure when changing between PSI and KPA. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 69 "crank" time should be considered. To disable this feature, set to zero. 10.3.14. NUMBER OF CRANK CYCLES Set to the number of cranking cycles required. (Zero will default to one.) PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 70 Select desired overspeed transient delay time in seconds. Time setting may be entered in tenths of seconds. 10.3.22. RUN OUTPUT FAIL-SAFE When enabled, this feature will inhibit the run output until the controller receives a speed sensing signal, thus preventing possible damage PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 71 Ready To Load programmable output is selected as is typically used in an AMF application. Set to the desired time in seconds, which the generator requires to effectively “warm-up” before accepting load. This PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 72 The Return Delay programming menu appears when the Utility Ready To Load programmable output is selected as is typically used in an AMF application. The Return Delay is initiated once the remote start PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 73 HIGH BAT VOLTAGE PREHEAT WEAK BAT VOLTAGE ENGINE RUNNING LOW OIL PRESS #1 ALARM ATS TEST LOW OIL PRESS #2 SHUTDOWN COMMON ALARM HIGH ENG TEMP #1 ALARM COMMON SHUTDOWN HIGH ENG TEMP #1 SHUTDOWN PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 74 The pre-lube output is also energized during the engine start delay and crank cycles, and de-energized when the engine reaches crank disconnect speed. Select the desired cycle lube duration (i.e. on time) in minutes (0-999). PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 75: Analog Fault Programming Menu

    This allows the alarm or shutdown circuit to be disabled until after the bypass timer has expired. Fault circuits that are not delayed will be enabled at all times (i.e. engine running or stopped). PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 76: Digital Fault Programming Menu

    BAT CHARGER FAIL VENT DAMPER FAIL HIGH FUEL LEVEL FAIL TO SYNC “Blank” (i.e. no text for unused inputs) Once the desired fault label is selected, press the “enter” key to accept the selection. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 77 999.9 seconds are available by entering the time required. 10.5.7. IDLE CONTROL DIGITAL INPUT PROGRAMMING When a digital input is programmed as Idle function, the following settings must be programmed to ensure correct operation. ACTION Alarm PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 78: Calibration Menu

    AC Voltage, AC current and battery voltage analog circuits are factory calibrated before the product is shipped therefore these circuits should not require any field calibration. Should field calibration be required refer to the applicable procedure as described further in this section. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 79 10.6.3. VOLTAGE CALIBRATION PROCEDURE NOTE: To accurately calibrate the MEC 20’s voltage sensors, an external test voltage meter is required, with an accuracy of 0.5% or better. Note: Zero Calibration must be completed before Span Calibration. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 80 Caution must be taken to ensure the generator output voltage is set within nominal limits. In the programming mode, scroll to the desired generator supply voltage phases with the SPAN function selected. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 81 10.6.4. CURRENT SENSING CALIBRATION   CURRENT A ZERO   350A  Displays the generator’s load current (phase A, B or C) to be calibrated. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 82 Adjust the correction factor number just until “0” amps is obtained. With the correct current displayed, press the ENTER push- button to accept the correction factor number. Record the PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 83 Failure to do so may cause personnel injury and/or death. Use the INCREMENT or DECREMENT push-buttons to adjust the correction factor number while observing the displayed current level on the MEC 20. Adjust the correction factor PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 84 To accurately calibrate the MEC 20’s battery voltage sensor, an external test DC voltmeter is required, with an accuracy of 0.5% or better. To calibrate the battery voltage sensor, perform the following procedure: PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 85 Before the equipment is put into final operating service, the engine temperature analog circuit must be field calibrated to meet the performance accuracy as specified, to ensure correct operation. The engine temperature analog circuit must be calibrated with the engine PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 86 With the correct temperature displayed, press the “enter” push-button to accept the correction factor number. Record the correction factor number on the MEC 20 programming sheet for future reference if required. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 87 Use the INCREMENT or DECREMENT push-buttons to adjust the correction factor number while observing the displayed pressure on the MEC 20. Adjust the correction factor number to obtain the identical pressure reading as measured with the external pressure gauge. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 88 Sender resistance data shown are for Oil Pressure Sender p/n-003654 (Thomson p/n), Manufacturer- Datcon, p/n 102227. Datcon Sender must be used with MEC software version 1.81 or greater (previous software versions cannot be used). Figure 22 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 89: Programming Sheets

    (EAP 110/MEC 20 Exp –Group 1 Only)  Programmable #6 – Form A/B] Disabled (Std Default) or Custom _____________________________________ (EAP 110/MEC 20 Exp –Group 2 Only) OTHER OPTIONAL FEATURES   Remote Communication Port Enabled VFD Display PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 90: Main Configuration

    TOGGLE BETWEEN DEG C/DEG F PRESSURE SCALE PSI/KPA TOGGLE BETWEEN PSI/KPA START DELAY XXX SECONDS 0-999 SECONDS CRANK TIME XX SECONDS 0-99 SECONDS REST TIME XX SECONDS 0-99 SECONDS STARTER RE-ENGAGE DELAY XX SECONDS 0-99 SECONDS 0=DISABLED PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 91 LOSS OF SPEED SIGNAL SHUTDOWN TOGGLE BETWEEN ALARM/SHUTDOWN ALARM/SHUTDOWN COMMON FAIL FOR NOT IN AUTO YES/NO TOGGLE BETWEEN YES/NO PROG OUTPUT #1 Common Fail (Factory default, unless otherwise specified) PROG OUTPUT #2 PROG OUTPUT #3 PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 92 PROG OUTPUT #5 PROG OUTPUT #6 WARMUP DELAY 0 – 99 SECONDS NEUTRAL DELAY 0 – 99 SECONDS RETURN DELAY 0 – 999 SECONDS RESET RUN HOURS ACCESS VIA MASTER PASSWORD ONLY YES/NO TOGGLE YES/NO, PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 93: Analog Fault Programming Menu

    ALARM HIGH ENG TEMP 206°F SENDER TEMP #2 SHUTDOWN LOW OIL PRESS 30PSI PRESS#1 SENDER ALARM LOW OIL PRESS 20PSI SENDER PRESS#2 SHUTDOWN * Indicates feature is non-programmable (i.e. is fixed) in software PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 94: Digital Fault Programming Menu

    START DELAY A=ALARM C=CLOSE Y=YES (SEC) Y=YES N=NO N=NO LOW OIL PRESSURE HIGH ENG TEMP 30.0 BATT CHGR INPUT FAIL LOW FUEL LEVEL “blank” “blank” “blank” “blank” “blank” “blank” REMOTE EMERG STOP IDLE PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 95: Calibration Menu

    VOLTS SPAN XXXVAC CURRENT ZERO XXXVAC CURRENT SPAN XXXVAC CURRENT ZERO XXXVAC CURRENT SPAN XXXVAC CURRENT ZERO XXXVAC CURRENT SPAN XXXVAC BATTERY VOLTAGE SPAN XXXVAC ENGINE TEMPERATURE XXX C/F OIL PRESSURE XXXX PSI/KPA PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 96: Specifications

    Analog Engine Temperature Measurement: Range: 0-200°C (maximum) Temperature Accuracy Operating range 0 - 30°C = +-8°C Operating range 30 -100°C = +-2°C Operating range 100 -200°C = +-8°C Specifications subject to change without notice. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 97: Connection Diagram

    GENERATOR SUPPLY MUST UTILIZE A SOLIDLY GROUNDED NEUTRAL SYSTEM – REFER TO INSTRUCTION MANUAL FOR ALTERNATE CONNECTIONS ENGINE MOUNTED COMPONENTS "GRD" CONNECTION TO BE MADE TO COMMON CHASSIS/ENCLOSURE GROUND BOND SYSTEM G:\ENGINEER\PRODUCTS\MEC20_04.VSD REV 3 02/02/20 PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 98: Trouble Shooting

    Controller cannot be “Reset” - Check that the controller is set to the OFF mode before trying to reset. - Check that the engine has come to a complete stop before trying to reset. PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 99 - Verify engine sensor wiring is correct. (Note: engine sensors must be factory supplied units only.) - Verify that the battery supply DC negative conductor is properly grounded to the engine block (i.e. to a common ground point). PM047 Rev 12 03/03/04 Thomson Power Systems...
  • Page 100 Temperature and Pressure Calibration table for values). Key presses on the lexan faceplate do not - Verify the interconnecting ribbon cable between the operate lexan faceplate and main printed circuit board is correctly connected. PM047 Rev 12 03/03/04 Thomson Power Systems...

  • Page 101: Notes

    MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER NOTES PM047 Rev 12 03/03/04 Thomson Power Systems...

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