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This manual is subject to change without notice. You may obtain the newest version of the manual at www.lamarchemfg.com
106 Bradrock Dr. Des Plaines, IL 60018-1967
Tel: 847 299 1188
Fax: 847 299 3061
La Marche Manufacturing Company
www.lamarchemfg.com
A77 Series
Microprocessor Controlled SCR
Filtered Charger / Battery Eliminator
Installation and Operation Manual
CPN 129767
Instruction Drawing Number: P25-LA77-1
Revision A17
1
Rev. Date: 11/20 ECN:22727
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Summary of Contents for La Marche A77 Series
- Page 1 La Marche Manufacturing Company www.lamarchemfg.com A77 Series Microprocessor Controlled SCR Filtered Charger / Battery Eliminator Installation and Operation Manual This manual is subject to change without notice. You may obtain the newest version of the manual at www.lamarchemfg.com 106 Bradrock Dr. Des Plaines, IL 60018-1967...
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Page 2: Mechanical Safety
Important Safety Instructions Before using this equipment read all manuals and other documents related to this charger and other equipment connected to this charger. SAVE THESE INSTRUCTIONS – This manual contains important safety and operating instructions for the A77. If a replacement copy of a manual is needed, it can be found at www.lamarchemfg.com. Electrical Safety WARNING: Hazardous Voltages are present at the input of power systems. -
Page 3: Charger Location
If any damage is observed, take pictures and contact the carrier immediately to file a damage claim. Contact La Marche for a Return Material Authorization number to have the charger sent back for evaluation and repair. -
Page 4: Table Of Contents
Table of Contents Important Safety Instructions ........................i Electrical Safety ............................i Mechanical Safety ........................... i Battery Safety............................i Charger Location ............................ ii Check for Damages ..........................ii Returns for Service ..........................ii Inspection Checklist ..........................ii Handling ..............................ii Table of Contents ............................ - Page 5 Selecting the Charging Mode .....................18 3.3.1 Equalize Timer Modes ......................18 Controller Menus ..........................19 Settings Menu ..........................19 4.1.1 Output Settings ........................19 Battery Type ............................19 Battery Cells ............................19 Float Voltage ............................20 Equalize Voltage ..........................20 Current Limit ............................20 4.1.2 Alarm Settings ........................20 Alarm Thresholds ..........................
- Page 6 Config Files ..........................22 Save Settings ..........................23 LCD Settings ............................23 Security .............................. 23 Serial Number ............................ 23 Set to Default ............................. 23 Firmware Menu ..........................23 Firmware Version ........................23 Update Firmware ........................23 Over Temperature Probe Status ......................24 Test Menu ..........................24 Test LEDs ............................24 Test Relays ............................24...
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Page 7: Model Scope/General Description
(if any) refer to the cover page of the manual package. If the manual package that is included with the charger is no longer available, contact La Marche and provide the model or serial number of the charger... -
Page 8: Equipment Handling
Equipment Handling Storing the A77 If the A77 is to be stored for more than a few days after delivery, it should be stored within its shipping container. The location chosen for storage should be within an ambient temperature of -40 to 185°F (-40 to 85°C) with a non-condensing relative humidity of 0 to 95%. -
Page 9: Wall-Mounting The A77 (10 & 477 Only)
2.1.1 Wall-Mounting the A77 (10 & 477 Only) The 10 & 477 enclosures of the A77 are shipped from the factory with the necessary brackets installed for wall- mounting (The same bracket is used for rear-mounting on a 19” relay rack and cannot be removed). The 977 enclosure does not come with wall mounting equipment;... -
Page 10: Floor-Mounting The A77 (All Enclosures)
2.1.2 Floor-Mounting the A77 (All Enclosures) Floor-mounting the 977, 72N, 46N, 47N & 57N enclosure is standard. If it is desired to floor mount a charger with the 10 or 477 enclosures, you will need the floor-mount bracket. NOTE: The floor-mount bracket adds an additional 3in (76.2mm) to the overall height of 10 and 477 enclosures. Floor-Mounting Procedure To floor-mount the A77, install four to six bolts into the floor. -
Page 11: Rack-Mounting The A77
The A77 can be installed in most relay racks with standard EIA hole spacing. If a relay rack is needed, they are available for purchase from La Marche. Before installing the charger on the rack, locate the placement of the conduit entrances and be sure the knockouts on the sides or bottom of the charger are accessible after the charger is rack mounted. -
Page 12: Changing Transformer Taps
Changing Transformer Taps NOTE: This procedure refers only to A77 battery chargers that are rated for 6 to 25 ADC. All other A77 battery chargers do not include transformer taps (Special chargers can be ordered upon request). Before wiring AC power to the A77, check the wiring of the power transformer PT to assure it is connected for the correct AC input voltage. -
Page 13: Ac Input Connections
Table 4 – AC/DC & Ground Wire Size Minimum Requirements (All wires specified in the table are rated at 90 °C or 194 °F) NOTE: These are recommended sizes per La Marche Standards. The National Electrical Code (NEC) and Local Wiring Codes must be followed. -
Page 14: Dc Output Connections
MaxAmp Table 5 – Wire Size/Area Table NOTE: These are recommended sizes per La Marche Standards. The National Electrical Code (NEC) and Local Wiring Codes must be followed. DC Connection Procedure To prevent the DC circuit breaker from tripping when connecting the battery, connections should be done in the following order: 1. -
Page 15: Paralleling Connections
2.4.1 Paralleling Connections A77 battery chargers have the capability to be installed in parallel for redundant applications. Take into consideration, the chargers being setup for paralleling MUST be of the same DC output rating and should all be either A77D model or A77DE model chargers. Please confirm each charger model on the nameplate on front prior to making connections. -
Page 16: Alarm Description
Figure 8 – Display/Control Board 2.5.2 Alarm Description RAMP UP FAILURE occurs if the charger fails to reach the nominal output voltage within two minutes of being powered up. The Ramp Up Failure Alarm has no dedicated LED or relay contacts. However, it is part of the Summary and Charger Fail alarms. - Page 17 OVERLOAD/CURRENT LIMIT ALARM share one LED. The “Overload/Current Limit” alarm LED will flash when the charger is in current limit, i.e. regulating the load in a constant current mode. When the charger is overloaded, the “Overload/Current Limit” LED will turn on solid. An overload requires two simultaneous conditions; the charger must be in current limit and the voltage has depressed to below the End of Discharge alarm percentage or threshold;...
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Page 18: Alarm Connection Procedure
All alarms contacts for the A77 are designed to be fail-safe. In other words, if both the AC and DC power are removed, each alarm will be indicating in its correct state. All relay contacts are shown in the de-energized state on schematics. -
Page 19: Load Sharing Connections
Load Sharing Connections All A77 chargers include the Load sharing feature. Load sharing allows the user to parallel with any identical A77 to actively share a DC load and therefore reduce the strain on each charger. Each is capable of sharing the DC load within ±5% for individual unit outputs greater than 5% of the total load capacity. -
Page 20: Remote Equalize/Can Bus Connections
Load Share wire, the chargers’ CAN bus communication ports must be connected together for Remote Equalize. This can be accomplished by using La Marche part number S8-A77-LS-REQ-15FT-1, pictured in Figure below. Regarding the CAN bus connections, the CAN bus data cables need to be 18 or 20 AWG twisted shielded pair with ground conductor, compliant to SAE J1939 specifications. -
Page 21: Ground Detection Connection
Ground Detection Connection Ground Detection is available on all A77 chargers. The purpose of Ground Detection is to determine if the battery or loads have become grounded. If the battery or loads are set up as Floating, it is recommended that Ground Detection be enabled. -
Page 22: Operation
Operation Starting the A77 All equipment is shipped from the factory fully checked and adjusted based on the model number. Do not make any adjustments unless the equipment has been powered up and the settings have been determined to be incorrect. -
Page 23: Digital Control Board
Digital Control Board The A77 is equipped with a microprocessor controller. This makes the A77 more user-friendly and provides new helpful features to the user. Figure 12 – A77 Front Panel After the A77 has completed the startup sequence, the AC ON and FLOAT LEDs should be on and the display should show the output voltage and current as pictured above. - Page 24 Selecting the Charging Mode The A77 charger has two different settings for DC output voltage, Float mode and Equalize mode. Float charging mode is used for all normal battery charging needs. Float mode can also be used for battery elimination, which means directly powering the DC load from the A77.
- Page 25 The communication instructions are included as part of the manual package only if a communication option has been ordered. NOTE: Some chargers may have additional settings included in the Settings menu; contact La Marche for further explanation of settings not mentioned below.
- Page 26 Float Voltage The “Float Voltage” setting allows the user to adjust the Float voltage supplied by the charger. Float voltage is adjustable by both the total output voltage and volts per cell. To change the Float voltage, select “Float Voltage” in the Output Settings menu.
- Page 27 Equalize Timer Hours The Equalize Timer Hours setting changes the amount of time that the charger remains in the Equalize charging cycle once activated. When an Equalize cycle is started, the charger will remain in Equalize mode until the time selected by this setting has passed.
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Page 28: Config Files
Relay Logic The Relay Mapping setting allows the user to change the setting of each relay to energize or de-energize in their normal state. Refer to the 46R option manual for further details. Communications Settings Upon selecting “Comm. Settings,” the user will be given access to MODBUS or DNP3 communication settings depending on the type of communication option included in the charger, as well as communication statistics. -
Page 29: Save Settings
To save a configuration file, insert a microSD card into the S2A-368S board, initialize the memory card, and select “Save Config” in the “Config Files” menu. If a configuration .cfg file already exists, it will be overwritten. NOTE: In order to prevent data loss, the “Remove Drive” option must be selected before physically removing the microSD card. -
Page 30: Over Temperature Probe Status
8. Update the firmware by entering the Settings menu: (Menu → Advanced → Firmware Menu → Update Firmware) 9. Enter the password provided (must contact La Marche Service Department) and select YES when prompted to update the firmware. The charger will start to program itself. Do not interrupt the power or the board while it is programming! 10. -
Page 31: Test Battery
The following guidelines should be taken into consideration: • Only use microSD cards provided by La Marche. • Do not use the microSD card for any other purpose besides data logging and firmware updating. -
Page 32: Events Only Logging
Events Only Logging The Events Only Logging records data only when an event occurs. When an event occurs, all charger data points are written to better understand the cause of said event. The events that are logged are: Alarm Occurrence, Alarm Cleared, Calibration Entered, Calibration Closed, Change in Charge Mode, and Charger Reset. -
Page 33: Installing/Removing The Microsd Card
Figure 2 – Warning Message About Erasing Data Figure 1 – SD Card Formatter Program with Overwrite Format Checked Figure 4 – Formatting Successful Message Figure 3 – Formatting in Progress After either format method is complete, it is advised to save the charger’s configuration .cfg file to the microSD Config Files card. -
Page 34: Reflected Harmonics
25→33% ATHD. Service All work inside the A77 charger should be performed by qualified personnel. La Marche is not responsible for any damages caused by an unqualified technician. Before working inside the A77, ensure the AC power is off at the main breaker box and the battery has been removed from the charger’s DC output terminals, either by removing the battery cables or... -
Page 35: Troubleshooting Procedure
La Marche Service Technicians are available to help with troubleshooting or with scheduling charger service. When calling for a service inquiry or for troubleshooting assistance, be sure to have all of the following information on hand: 1. -
Page 36: Ordering Replacement Parts
Service Department for further troubleshooting. Ordering Replacement Parts Contact La Marche to place an order for spare or replacement parts. To order replacement parts; please provide the model and serial number of the battery charger, the part needed, and the quantity required. -
Page 37: Appendix A: Parameter Ranges
Appendix A: Parameter Ranges Lithium Ion Nickel Parameter Lead Acid Cadmium 130V Float Voltage 1.87-2.45 V/C 1.24-1.61 V/C 6-15V 12-30V 24-60V 60-150V Equalize Voltage 1.87-2.5 V/C 1.24-1.73 V/C 6-15V 12-30V 24-60V 60-150V Low DC Voltage End of Discharge High DC Voltage 0-2.67 V/C 0-1.78 V/C 0-16V... -
Page 38: Appendix B: A77 Menu Structure Flowchart
Appendix B: A77 Menu Structure Flowchart Settings Menu Output Settings Battery Type Battery Type Lead Acid|NiCad|Lithium Ion Battery Cells*** xx Cells Float Voltage Equalize Voltage Refer to Appendix A within the instruction manual. Current Limit Alarm Settings Alarm Threshold AC Fail Low DC Volts Low DCV Reset End of Discharge Reset... - Page 39 Settings Menu Advanced Set Clock Set Clock xx/xx/xxxx xx:xx:xx Reset Clock Yes|No Logs and Files Remove Drive Yes|No Insert Drive Yes|No Data Logging Enable Event Logging Yes|No Log Interval Off - 60 minutes Initialize Yes|No Configure Files Load Configure Yes|No Save Configure Yes|No Initialize...
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Page 40: Appendix C: Microsd Card File Retrieval Instructions
Appendix C: MicroSD Card File Retrieval Instructions The following instructions are for retrieving the files in the microSD card on an A77 charger via the Settings Menu. The instructions are as follow: 1. Press the “Menu” button to enter the Customer Calibration menu and navigate through the following and select “YES”... -
Page 41: Appendix D: Ac Draw, Heat Loss, And Shipping Weight (Single Phase)
Appendix D: AC Draw, Heat Loss, and Shipping Weight (Single Phase) AC Input Current Draw @ 100% Load Approx. Model Number Watts BTU/hr* Weight – Amps lbs (kg) (ZD) A77D(E)-12-24V 92 (42) A77D(E)-16-24V 98 (44) A77D(E)-20-24V 100 (45) A77D(E)-25-24V 104 (47) A77D(E)-30-24V 147 (67) A77D(E)-35-24V... -
Page 42: Appendix E: Ac Draw, Heat Loss, And Shipping Weight (Three Phase)
Appendix E: AC Draw, Heat Loss, and Shipping Weight (Three Phase) AC Input Current Draw @ 100% Approx. Load Model Number Watts BTU/hr* Weight – Amps lbs (kg) (ZD) A77D(E)-75-24V 1267 330 (150) A77D(E)-100-24V 1690 475 (215) A77D(E)-125-24V 2112 530 (240) A77D(E)-150-24V 2535 600 (272) -
Page 43: Appendix F: Manufacturer's Warranty
Should minor adjustments be required, the local La Marche sales representative should be contacted to provide this service only. All sales are final. Only standard La Marche chargers will be considered for return. A 25% restocking fee is charged when return is factory authorized. Special chargers are not returnable. -
Page 44: Appendix G: Document Control And Revision History
Appendix G: Document Control and Revision History Part Number: 129767 Instruction Number: P25-LA77-1 Issue ECN: 20494 – 07/14 22727 – 11/20 22457 – 01/20 22383 – 11/19 22379 – 11/19 21278-10 – 06/19 21278-4 – 10/17 21278-5 – 10/17 21278-8 – 06/18 21278-9 –...
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