Supermicro SC847 JBOD User Manual page 100

SC847E1C/2C JBOD Chassis Manual
D-7 Front Connector and Pin Definitions
1. - 2. Primary and Secondary Expander Chips
The primary and secondary expander chips
allow the backplane to support dual port, cas-
cading, and failover configurations.
3. Backplane Power Connectors
The 4-pin connectors, designated PWR1 -
PWR5 provide power to the backplane. See the
table on the right for pin definitions.
4. - 5. Primary and Secondary SAS Ports
The primary SAS connectors are designated
PRI_J0 (J20), PRI_J1 (J21), PRI_J2 (J22)
and PRI_J3 (J23). The secondary SAS Ports
are designated SEC_J0 (J30), SEC_J1 (J31),
SEC_J2 (J32. and are not present on EL1
single port backplanes.
6. - 7. Primary and Secondary UART Con-
nectors
The primary UART connector is designated
P_UART (J26). The secondary UART con-
nector is designated S_UART(J36) and is not
present on BPN-SAS3-847EL1. UART con-
nectors are used for manufacturer's diagnostic
purposes only.
8. - 9. SDB Connectors
The Primary SDB connector is designated
P_SDB (J27). The secondary SDB connector
is designated S_SDB (J37). (Not present on
BPN-SAS3-847EL1 backplanes) These are
debug connectors used for the manufacturer's
diagnostic purposes only.
10. I C Connector
2
The I2C connector. is designated PRI_I2C1
(J29). The secondary I2C connector is des-
ignated I2C4 and J47. (Not present on BPN-
SAS3-847EL1 backplanes)
Pin#
1
2 and 3
4
D-4
Backplane
Main Power
4-Pin Connector
Definition
+12V
Ground
+5V