Analog Devices DC2515B Kurzanleitung zur Einrichtung

DEMO MANUAL DC2515B

Rev. 0

DESCRIPTION

LTC6810-1

6-Channel Battery-Stack Monitor

with Daisy-Chain Interface

Demonstration circuit 2515B features the LTC

6810-1, a

6-channel battery-stack monitor. Multiple boards can be

linked through a 2-wire isolated serial interface (isoSPI™)

to monitor a long series of cells in a stack. The DC2515B

demo board also features reversible isoSPI enabling a

redundant communication path. The PCB, components,

and DuraClik connectors are optimized for Low EMI

Susceptibility and Emissions.

The DC2515B can communicate to a PC by connecting

a DC2792B dual master isoSPI together with DC2026

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

Linduino

One. The DC2026 must be loaded with the

appropriate program (called a sketch) to control the bat-

tery stack monitor IC and receive data through a USB

serial port. The DC2026C provides a standard SPI inter-

face which can be translated to isoSPI and then con-

nected to a DC2515B isoSPI port (J4 or J5 connector).

The DC2792B companion board provides two SPI-isoSPI

channels for reversible operation.

Design files for this circuit board are available.

Specifications are at TA= 25°C

PARAMETER MIN TYP MAX UNITS

V+Supply Voltage 5.0 20 27.5 V

V+to C6 Voltage –0.3 V

C0/S0 Voltage 0 5 V

VREG Supply Voltage 4.5 5 5.5 V

VREF1 1st Reference Voltage, No Load 3.1 3.2 3.3 V

VREF2 2nd Reference Voltage, 5k Load to V–2.994 3 3.006 V

VBIAS IBIAS Voltage, READY/ACTIVE State 1.9 2.0 2.1 V

CPIN Input Range 0 5 V

Cell Count 6

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DEMO MANUAL DC2515B

Rev. 0

HARDWARE SETUP

Wiring J1 Connector

The DC2515B demo board connector pinout is critical;

correct wiring must be followed to avoid the risk of dam-

aging the DC2515B demo board.

When connected to a battery-stack, power for the

DC2515B is provided by the cell group being monitored.

To connect the cell group, separate the screw-terminal

block section from the J1 connector. Then, insert the cell-

voltage connections or resistors into the screw-terminal

clamping contacts. These connections provide the power

and input stimulus for the battery-stack monitor IC.

Cell-voltages are wired to J1 starting from position 4

(most negative potential of the group). Please refer-

ence the appropriate demo board J1 connector pinout

in Table1.

Alternatively, resistors can be used to simulate battery

cell-voltages. 100Ω 2W or equivalent resistors are recom-

mended because 100Ω (or lower values) typically will not

induce measurement errors and the 2W (or greater rating)

will keep the resistor temperatures low preventing power

dissipation damage.

DC2515B 6 Resistor Connection

Carefully connect six 100Ω resistors onto the screw-

terminal block between each CPIN input clamping con-

tact from position 4 to position 10 as shown in Table1,

DC2515B J1 pinout and Figure1. Provide a stack-equiva-

lent power supply connection to position 10 (positive) and

position 4 (negative). The power supply may be adjusted

to provide the desired nominal cell-voltage (ex. 19.8V will

be 3.3V per cell).

Figure1. Resistor Divider String

100Ω

DC2515B F01

Table1. DC2515B J1 Pinout

J1 PIN CPIN INPUT

1 NC

2 NC

3 NC

4 C0/V–

5 C1

6 C2

7 C3

8 C4

9 C5

10 C6

11 NC

12 NC

13 NC

14 NC

15 NC

16 NC

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DEMO MANUAL DC2515B

Rev. 0

DC2515B SERIAL INTERFACE OPTIONS

The isoSPI is the only communication option to DC2515B.

Due to the custom EMI optimized isoSPI cable with

DuraClik connectors, it’s highly recommended to use

DC2792B dual master isoSPI demo board or equivalent

for easy plug-and-play operation. The DC2792B dual

master isoSPI demo board can be connected as a typi-

cal single-ended isoSPI bus master or to both ends of

a reversible configuration with two isoSPI bus masters.

Refer to demo manual DC2792B for usage details.

DC2792B to DC2515B Typical isoSPI Connection

A typical isoSPI connection begins with the isoSPI Master

connected to the first (or bottom) DC2515B. Additional

DC2515B boards can be daisy-chained onto the isoSPI

bus. Communication begins from the first (or bottom)

DC2515B then to the next upper DC2515B and, finally, to

the last (or top) DC2515B.

Figure2 shows the following connections for two boards

on a stack interfaced to a PC:

1. Connect a USB cable from the PC USB port to the

DC2026 J5 connector.

2. ConnecttheDC2026totheDC2792Bdual master isoSPI

demo board.

a. Connect a 14-pin ribbon cable from the DC2026 J1

header to the DC2792B J1 header.

3. Connect the DC2792B to the DC2515B. This DC2515B

is the ﬁrst (or bottom) board of the stack.

a. Connect a 2-wire twisted-pair patch cable from the

DC2792B J2 MAIN DuraClik connector to the bottom

DC2515B J4 isoSPI A DuraClik connector.

CAUTION! The 2-wire twisted-pair patch cable with

the DuraClik end plugs have 1mm thick center locking

tabs on the wiring side that must be pressed down to

release from the DuraClik receptacles. Failure to do

so may damage the cable and prevent board-to-board

isoSPI communication.

4. Connect or daisy-chain the DC2515B to another

DC2515B in isoSPI mode. This DC2515B is the last

(or top) board of a two-board stack. More DC2515B

upper boards can be daisy-chained together in the

same manner.

a. Connect a 2-wire twisted-pair patch cable from the

bottom DC2515B J5 isoSPI B DuraClik connector to

the next upper or top DC2515B J4 isoSPI A DuraClik

connector.

5. CAUTION! Prevent damage to the DC2515B. Refer to

Table1 and conﬁrm that the cell-voltage connections

to the screw-terminal block matches the DC2515B J1

pinout.

a. Plugthe screw-terminalblocksintotheJ1cell-voltage

connectors.

6. RefertotheSoftware Setup section of thisdemomanual

to properly setup the PC with the Arduino IDE software

to allow communication to the DC2515B boards.

Figure2. DC2792B Typical isoSPI Connection to the Bottom DC2515B in a Two-Board DC2515B Stack

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DEMO MANUAL DC2515B

Rev. 0

DC2515B SERIAL INTERFACE OPTIONS

DC2792B to DC2515B Reverse isoSPI Connection

A reverse isoSPI connection begins with the isoSPI

Master connected to the last (or top) DC2515B. Additional

DC2515B boards can be daisy-chained onto the iso-

SPI bus. Communication begins from the last (or top)

DC2515B then to the next lower DC2515B and, finally, to

the first (or bottom) DC2515B.

Figure3 shows the following connections for two boards

on a stack interfaced to a PC:

1. Connect a USB cable from the PC USB port to the

DC2026 J5 connector.

2. ConnecttheDC2026totheDC2792Bdual master isoSPI

demo board.

a. Connect a 14-pin ribbon cable from the DC2026 J1

header to the DC2792B J1 header.

3. Connect the DC2792B to the DC2515B in isoSPI

mode. This DC2515B is the last (or top) board of a

two-board stack.

a. Connect a 2-wire twisted-pair patch cable from the

DC2792B J2 MAIN DuraClik connector to the top

DC2515B J5 isoSPI B DuraClik connector.

CAUTION! The 2-wire twisted-pair patch cable with

the DuraClik end plugs have 1mm thick center locking

tabs on the wiring side that must be pressed down to

release from the DuraClik receptacles. Failure to do

so may damage the cable and prevent board-to-board

isoSPI communication.

4. Connect or daisy-chain the DC2515B to another

DC2515B in isoSPI mode. This DC2515B is the ﬁrst (or

bottom) board of a two-board stack. More DC2515B

lower boardscan be daisy-chained togetherin the same

manner.

a. Connect a 2-wire twisted-pair patch cable from the

top DC2515B J4 isoSPI A DuraClik connector to the

next lower or bottom DC2515B J5 isoSPI B DuraClik

connector.

5. CAUTION! Prevent damage to the DC2515B. Refer to

Table1 and conﬁrm that the cell-voltage connections

to the screw-terminal block matches the DC2515B J1

pinout.

a. Plugthe screw-terminalblocksintotheJ1cell-voltage

connectors.

6. RefertotheSoftware Setup section of thisdemomanual

to properly setup the PC with the Arduino IDE software

to allow communication to the DC2515B boards.

DC2792B to DC2515 Redundant isoSPI Connection

A redundant isoSPI connection begins with the primary

(or main) isoSPI Master connected to the first (or bot-

tom) DC2515B and has a backup auxiliary (or aux) isoSPI

Figure3. DC2792B Reverse isoSPI Connection to the Top DC2515B in a Two-Board DC2515B Stack

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DEMO MANUAL DC2515B

Rev. 0

DC2515B SERIAL INTERFACE OPTIONS

Master connected to the last (or top) DC2515B. Additional

DC2515B boards can be daisy-chained between the two

isoSPI masters on the isoSPI bus. Primary (or main) com-

munication begins from the first (or bottom) DC2515B

then to the next upper DC2515B and, finally, to the last (or

top) DC2515B. The backup auxiliary (or aux) communica-

tion begins in the reverse direction to provide coverage

when a possible isoSPI daisy-chain break occurs.

Figure4 shows the following connections for two boards

on a stack interfaced to a PC:

1. Connect a USB cable from the PC USB port to the

DC2026 J5 connector.

2. ConnecttheDC2026totheDC2792Bdual master isoSPI

demo board.

a. Connect a 14-pin ribbon cable from the DC2026 J1

header to the DC2792B J1 header.

3. Connectthe DC2792B primary(or main) isoSPI master

to the ﬁrst (or bottom) DC2515B board of the stack.

a. Connect a 2-wire twisted-pair patch cable from the

DC2792B J2 MAIN DuraClik connector to the bottom

DC2515B J4 isoSPI A DuraClik connector.

CAUTION! The 2-wire twisted-pair patch cable with

the DuraClik end plugs have 1mm thick center locking

tabs on the wiring side that must be pressed down to

release from the DuraClik receptacles. Failure to do

so may damage the cable and prevent board-to-board

isoSPI communication.

4. Connect or daisy-chain the DC2515B to another

DC2515B in isoSPI mode. This DC2515B is the last

(or top) board of a two-board stack. More DC2515B

upper boards can be daisy-chained together in the

same manner.

a. Connect a 2-wire twisted-pair patch cable from the

bottom DC2515B J5 isoSPI B DuraClik connector to

the next upper or top DC2515B J4 isoSPI A DuraClik

connector.

5. Connect the DC2792B auxiliary (or aux) isoSPI Master

to the last (or top) DC2515B board of the stack.

a. Connect a 2-wire twisted-pair patch cable from the

DC2792B J3 AUX DuraClik connector to the top

DC2515B J5 isoSPI B DuraClik connector.

6. CAUTION! Prevent damage to the DC2515B. Refer to

Table1 and conﬁrm that the cell-voltage connections

to the screw-terminal block matches the DC2515B J1

pinout.

a. Plugthe screw-terminalblocksintotheJ1cell-voltage

connectors.

7. RefertotheSoftware Setup section of thisdemomanual

to properly setup the PC with the Arduino IDE software

to allow communication to the DC2515B boards.

Figure4. DC2792B Redundant isoSPI Connections to the Bottom and Top DC2515B in a Two-Board DC2515B Stack

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DEMO MANUAL DC2515B

Rev. 0

SOFTWARE SETUP

The DC2515B can be controlled with the DC2026 Linduino One board together with DC2792B dual isoSPI Master or

equivalent isoSPI transceiver. The DC2026 is part of the Arduino compatible Linduino platform that provides example

code that will demonstrate how to control the multicell battery-stack monitor ICs. Compared to most Arduino compat-

ible microcontroller boards, the DC2026 offers conveniences such as an isolated USB connection to the PC, built-in

SPI MISO line pull-up to properly interface with the battery stack monitor IC open drain SDO, and an easy ribbon cable

connection for SPI communication through the DC2792B 14-pin QuikEval™ J1 connector.

Arduino IDE Setup

1. Download then install the Arduino IDE onto the PC. Detailed instructions can be found under the quick start tab.

2. Set the Arduino IDE to open BMS Sketchbooks. From within the Arduino IDE, click on File menu select Preferences.

Then under Sketchbook location: select Browse and locate the path to the extracted LTSketchbook.zip ﬁle that was

downloaded (see Figure5).

Figure5. Sketchbook Location Path

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DEMO MANUAL DC2515B

Rev. 0

SOFTWARE SETUP

3. Close then re-open the Arduino IDE to enable the use of the Sketchbook Location that was previously set.

4. Select the correct COM port to allow communication to DC2026 through USB. Under the Tools menu, select Port

➞Select the highest number COMxx with the

✓

check mark symbol. There may be more than one option; DC2026

is usually the highest COM port number. The PC screenshots (Figure6) used in this example show the DC2026

connected to COM6.

5. Select the correct Arduino compatible microcontroller board. Under the Tools menu, select Board ➞Arduino/

Genuino Uno with the ●black dot symbol (see Figure7).

Figure6. Selecting Correct COM

Figure7. Selecting Compatible Microcontroller Board

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DEMO MANUAL DC2515B

Rev. 0

SOFTWARE SETUP

6. Open one of the programs or sketches associated with the DC2515B. In this example LTC6810 sketch will be opened.

Under the File menu, select Sketchbook ➞Part Number ➞6000 ➞6810 ➞DC2515 (see Figure8).

Figure8. Selecting the LTC6810 Sketch

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DEMO MANUAL DC2515B

Rev. 0

SOFTWARE SETUP

7. Upload the DC2515 sketch onto the DC2026 by clicking on the Upload button on the top left corner. When this

process is completed there will be a Done Uploading message on the bottom left corner (see Figure9).

Figure9. Uploading DC2515 Sketch

Figure10. Arduino Serial Monitor Tool

8. Open the Arduino Serial Monitor (Figure10) tool. Click on the Serial Monitor button on the top right corner then

the Serial Monitor window will open and show on the top left corner the COMxx used.

DEMO MANUAL DC2515B

Rev. 0

SOFTWARE SETUP

9. Conﬁgure the Serial Monitor to allow communication to the DC2026 through USB. On the bottom of the Serial

Monitor window, set the following starting from bottom left to bottom right:

a. Click on the Autoscroll checkbox for the ✓check mark symbol.

b. Select Both NL & CR on the left dropdown menu.

c. Select 115200 baud on the right dropdown menu.

d. As shown in Figure11, when conﬁgured correctly the DC2515 sketch menu will appear.

Figure11. DC2515 Sketch Menu

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