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Bootloader Mode 

 

The device can start in bootloader mode so firmware updates are possible without using the 
programming  header. Place a jumper between J2.4 and J2.5, than connect the unit to USB to 
enter bootloader mode.  
 
Start the HIDBootLoader.exe software provided to flash the new firmware. 
 

Reseting the MCU 
 

Placing shortly a jumper between J2.1 and J2.2 will reset the internal MCU reloading your 
reconfigured parameters and restarting the UPS. Care should be taken when using this feature. 

 

Getting Started… 
 

Before you start you would need to connect the unit to USB and configure: 
 
- battery type and capacity (default is PbSO4 and 7000mAh) 
- number of cells connected to the balancing headers (default is CELLS=1) 
- charge voltages and currents, (default is 14.1V and 1700mA when fast charging) 

- output voltage (default is 12V) 
- input start/stop voltage thresholds ( default start at 11V, stop at 6V) 
- other advanced parameters if needed 
 
NOTE: The device needs to be restarted so the new configuration becomes active. 
Simply remove the power and disconnect USB cable to shut down, settings will be 
permanently saved. 
 

Warning

:  Improper configuration (ex: wrong under-voltage, over-voltage, reverse 

polarity) can lead to battery damage or your system damage (ex: wrong output value) 
 

Battery Configurations:  

 
This device is a multi chemistry device. Multiple batteries (up to 6 cells, 4.2V max) can 
be connected in series (1S, 2S, 3S, 4S, 5S, 6S configuration). Parallel configurations 
are also supported but not recommended due to possible decrease in lifespan. 
  
It is possible to connect a battery with more than 4.2V/cell but in this case only 1 cell 
should be configured (CELLS=1). Balancing is disabled in this case. This is a typical 
example of a 12V SLA battery. 
 
Connect your main battery terminals to the J4 connector. Always double check the 
polarity of the connections. 
  
Connect the internal cells to the balancing header J6, if needed. If more than 1 cell and 
less than 6 cells are used connect the negative terminal of the battery to the next free 
pin on the J6 header.  
 
NOTE: If no balancing wires are connected through the J6 header the CELLS 
parameter should be set to 1. 
 
Example: connecting 4 cells( cells 6, 5, 4 and 3) 
- The “highest” cell, cell_6, is always connected to the power terminal BAT+ (no need 

 

Summary of Contents for Open-UPS

Page 1: ...ruptible power supply The OPENUPS was designed to provide user specified regulated power output from a wide input voltage battery backup multi chemistry charging and cell balancing in a single PCBA Op...

Page 2: ...ENUPS Connection diagram Power Input Output Connectors J1 Input voltage 4pin mini FIT JR J4 Battery positive and Battery negative 2 pin mini FIT JR J3 Output voltage 4 pin mini FIT JR Balancing header...

Page 3: ...isconnect USB cable to shut down settings will be permanently saved Warning Improper configuration ex wrong under voltage over voltage reverse polarity can lead to battery damage or your system damage...

Page 4: ...Connect a proper input voltage source to the J1 connector If input voltage is present configurable by thresholds openUPS will enable the proper power path and energy will be flowing from input to outp...

Page 5: ...main LED s 500msec ON 2 5 sec OFF System is running on battery All LEDS OFF Unit is in Deep sleep mode consuming very little power MCU is not powered Can be waked up by shorting J8 or if input voltage...

Page 6: ...5 max depending on load V in and V out Input connectors Mini Fit JR Output Connector Mini Fit JR Output Input Rail Output Current buck boost converter Maximum input current 6A Peak Input current 10A 3...

Page 7: ...IN_MIN_START V If input voltage is above this threshold the UPS will start and take power from the input Default is 11V UPS_VIN_MIN_STOP V If input voltage is below this threshold the UPS will try to...

Page 8: ...mAh Battery Capacity Default 7000mAh CHG_BAT_TYPE The battery chemistry to be charged 0 PbSO4 float charge is applied 1 LiFePO4 float charge is not applied 2 LiPO float charge is not applied Other fl...

Page 9: ...s 290mA CHG_IFLOAT Charge current limit in float charge mode for PbSO4 batteries Default is 100mA CHG_GLOBAL_TOUT Global charge timeout Default is 1260 minute CHG_TOPPING_TIMER For Lithium based batte...

Page 10: ...NOFF_TOUT ms The power switch on the motherboard if connected will be shorted this period to turn the Motherboard ON or OFF Default is 500ms POUT_LO W Output power low threshold for motherboard alive...

Page 11: ...or initial 50 fuel gauge estimation Default is 12 3V OCV_SOC75 Open Circuit Voltage State Of Charge detection for initial 75 fuel gauge estimation Default is 12 6V OCV_SOC100 Open Circuit Voltage Stat...

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