Supermicro SC847 JBOD - Page 82

C-4
SC847E1C/2C JBOD Chassis Manual
C-7 Front Connector and Pin Denitions
Backplane
Main Power
4-Pin Connector
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1
+12V
2 and 3 Ground
4 +5V
3. Backplane Power Connectors
The 4-pin connectors, designated PWR1 -
PWR6 provide power to the backplane. See the
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1. - 2. Primary and Secondary Expander Chips
The primary and secondary expander chips
allow the backplane to support dual port, cas-
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4. - 5. Primary and Secondary SAS Ports
The primary SAS connectors are designated
J49 and J50. The secondary SAS Ports are
designated J51 through J52 and are not pres-
ent on EL1 single port backplanes.
6. - 7. Primary and Secondary UART Con-
nectors
The primary UART connector is designated
PRI-UART and J30. The secondary UART
connector is designated SEC-UART and J24
and is not present on BPN-SAS3-846EL1.
UART connectors are used for manufacturer's
diagnostic purposes only.
8. - 9. SDB Connectors
The Primary SDB connector is designated PRI-
SDB and J31. The secondary SDB connector
is designated SEC-SDB and J29. (Not present
on BPN-SAS3-846EL1 backplanes) These are
debug connectors used for the manufacturer's
diagnostic purposes only.
10. I
2
C Connectors
The I
2
C connector. is designated EXP I2C0.