4
Rev. 0
DC2026 TO DC2515 SPI CONNECTION
A SPI connection begins with the SPI Master connected to
the first (or “bottom”) DC2515. Additional DC2515 boards
can be daisy-chained onto the isoSPI bus. Communication
begins from the first (or “bottom”) DC2515 then to the
next “upper” DC2515 and, finally, to the last (or “top”)
DC2515.
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. Connect the DC2026 to the DC2515 in SPI mode. This
DC2515 is the first (or “bottom”) board of the stack.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the “bottom” DC2515 J4 header.
b. Set JP1, JP2, and JP4 to 0 for SPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
3. Connect or daisy-chain the DC2515 to another
DC2515 in isoSPI mode. This DC2515 is the last
(or “top”) board of a two-board stack. More DC2515
“upper” boards can be daisy-chained together in the
same manner.
a. Connect a RJ45 patch cable from the “bot-
tom” DC2515 J1 isoSPI B RJ45 connector to the
next “upper” or “top” DC2515 J2 isoSPI A RJ45
connector.
b. Set the next “upper” or “top” DC2515 JP1, JP2, and
JP4 to 1 for isoSPI communication.
4. CAUTION! Prevent damage to the DC2515. Refer to
Table 1 and confirm that the cell-voltage connections to
the screw-terminal block matches the DC2515 J3 pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
5. Refer to the Software Setup section of this demo manual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure 2. DC2026 SPI Connection to the “Bottom” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2
JP1
isoSPI A
J2
J4
J5
J1
isoSPI B
J1
J3
DC2515
DTEN
ISOMD
JP4
JP3
JP2
JP1
isoSPI A
J2
J4
isoSPI B
J1
J3
DC2515 F02