7
Rev. 0
DC2792 TO DC2515 REDUNDANT isoSPI CONNECTION
A redundant isoSPI connection begins with the primary
(or “main”) isoSPI Master connected to the first (or
“bottom”) DC2515 and has a backup auxiliary (or “aux”)
isoSPI Master connected to the last (or “top”) DC2515.
Additional DC2515 boards can be daisy-chained between
the two isoSPI masters on the isoSPI bus. Primary (or
“main”) communication begins from the first (or “bot-
tom”) DC2515 then to the next “upper” DC2515 and,
finally, to the last (or “top”) DC2515. The backup auxiliary
(or “aux”) communication begins in the reverse direction
to provide coverage when a possible isoSPI daisy-chain
break occurs.
Figure 5 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 DC2792 Dual Master isoSPI
demo board.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the DC2792 J1 header.
3. Connect the DC2792 primary (or “main”) isoSPI master
to the first (or “bottom”) DC2515 board of the stack.
a. Connect a RJ45 patch cable from the DC2792 J2
MAIN RJ45 connector to the “bottom” DC2515 J2
isoSPI A RJ45 connector.
b. Set the “bottom” DC2515 JP1, JP2, and JP4 to 1
for isoSPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
4. 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.
5. Connect the DC2792 auxiliary (or “aux”) isoSPI Master
to the last (or “top”) DC2515 board of the stack.
a. Connect a RJ45 patch cable from the DC2792 J3
AUX RJ45 connector to the “top” DC2515 J1 isoSPI
B RJ45 connector.
6. 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.
7. 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 5. DC2792 Redundant isoSPI Connections to the “Bottom” and “Top” 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
DC2792
MAIN
J1
J2
AUX
J3
isoSPI B
J1
J3
DC2515
DTEN
ISOMD
JP4
JP3
JP2
JP1
isoSPI A
J2
J4
isoSPI B
J1
J3
DC2515 F05