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dc2260af

DEMO MANUAL DC2260A

DESCRIPTION

LTC6811-2 

Addressable isoSPI Battery-

Stack Monitor

Demonstration circuit 2260A is an Addressable isoSPI 

Battery-Stack Monitor featuring the

 LTC6811-2

. Multiple 

boards can be linked through a 2-wire isolated serial in-

terface to monitor any number of cells on a stack. 
Communication to a PC uses a DC2026 Linduino

®

 One 

as a USB interface. The DC2026 comes preloaded with 

a legacy DC590 emulator function (the DC590 can also 

still be used

1

). A control program for up to ten stacked 

boards has a Graphical User Interface (GUI) to implement 

the device command set.
To control more than one DC2260A, the DC1941B isoSPI 

adapter and RJ45 (Ethernet) patch cables are also required.  

HARDWARE SETUP

When connected to a battery stack, power for the DC2260A 

is provided by the cell group being monitored. Separate 

the screw-terminal section from J1 and wire cell voltage 

connections or resistors into the clamping contacts to 

provide the input stimulus for the ADC.
Cell voltages are wired from position 4 (most negative 

potential of the group) with increasing potentials up to 

position 16 (most positive potential).

L

, LT, LTC, LTM, Linear Technology and the Linear logo and Linduino are registered 

trademarks and QuikEval is a trademark of Linear Technology Corporation. All other 

trademarks are the property of their respective owners.

Photo 1. Connecting a Board to a PC

Design files for this circuit board are available at  

http://www.linear.com/demo/DC2260A

Alternatively, for a simple demo, connect twelve 100Ω 

resistors between each contact from position 4 to position 

16 as shown in Figure 1. Then, provide a “stack-equivalent” 

power supply connection to position 16 (positive) and 

position 4 (return). The supply may be adjusted to provide 

the desired nominal cell voltage (e.g., 43.2V will be 3.6V/

cell). 

Note that cell discharge cannot be demonstrated 

properly with a resistor string stimulus

.

Photo 1 shows the following connections for one board 

interfaced to a PC:
1. Set jumpers on the board per Figure 1.
2. Connect a USB cable from the PC USB port to DC2026.
3. Connect a 14-pin ribbon from DC2026 to the SPI con-

nector (J2) on DC2260A.

4. Mate the J1 cell-voltage connector. The blue LED will 

illuminate when power is applied. The brightness reflects 

the supply current.

1

A DC590 is a USB data acquisition board that serves to interface the DC2259 to a PC’s USB 

port. This board is not necessary with a DC2026.

Summary of Contents for DC2260A

Page 1: ...tion 16 most positive potential L LT LTC LTM Linear Technology and the Linear logo and Linduino are registered trademarks and QuikEval is a trademark of Linear Technology Corporation All other trademarks are the property of their respective owners Photo 1 Connecting a Board to a PC Design files for this circuit board are available at http www linear com demo DC2260A Alternatively for a simple demo...

Page 2: ...2 dc2260af DEMO MANUAL DC2260A Photo 2 Connections and Jumpers DESCRIPTION ...

Page 3: ...3 dc2260af DEMO MANUAL DC2260A Figure 1 Simple Cell Simulator Using Resistors DESCRIPTION ...

Page 4: ... of all DC2260A ISOMD jumpers to the 1 position JP1 2 3 5 6 n Interconnection of isoSPI ports with RJ45 patch cables J3 and J4 are interchangeable n TERMinationjumpers JP11 onDC2260Ashouldallbe set to 0 except for the unit electrically furthest from the DC1941 JP11 set to 1 SOFTWARE SETUP To use the DC2026 USB interface board download the free driver for a program called QuikEval from http www lin...

Page 5: ...d 16 bit word to check that the data transmission was properly executed The received PEC15 word and the calculated PEC15 word from the received data are displayed in the top section labeled PACKET ERROR CODE 15 BIT and both words should match The oval located at the top of the color coded status panel for the one board will turn green if the PEC15 words match Data transmission errors will produce ...

Page 6: ...he six bytes read back should match the bytes sent and the PEC15 CRC15 check 16 bit words should be a match green PEC oval on stack display When any configuration information is changed on the screen the WRITE CONFIG command button will be il luminated serving as a reminder that this command still needs to be executed Set REFUP to 1 followed by a WRITE CONFIG command The Watchdog Timer WDT will no...

Page 7: ...e START OPEN WIRE command button connects the built in open wire detection circuitry to all cells This command must be followed by any command buttons inside the READ CELLS box click to see the result The OPEN WIRE TEST CURRENT box provides options to use either PULLUP or PULLDOWN Open Wire Test Currents An open wire connection to any cell will be indicated by an abnormally high voltage measuremen...

Page 8: ...ox with the label OFF means that the system is stopped and waiting for a new command to be sent DATALOGGING OPERATION The GUI program can datalog or store cell voltage re sults in a CSV Comma Separated Value csv file This feature is useful in characterizing cell voltages over time Dataloggingoperatessimilarlytocontinuousoperationbut has the added functionality of storing results in a CSV file 1 At...

Page 9: ...anel will expand to include all boards connected in a stack Each small square in this array represents an individual battery in the stack of boards The intent of this display is to provide a way to see the status of all cells at a glance The significance of the colors used is explained in the legend on the screen Consultthedatasheetfordetailedinformationconcerning the operation of the LTC6811 2 CO...

Page 10: ...TORY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use o...

Page 11: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Analog Devices Inc DC2260A ...

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