
C-5
Appendix C BPN-SAS2-836EL Backplane Specications
6. Fan Connectors
The 4-pin connectors, designated FAN1
through FAN3, provide power to the fans.
See the table on the right for pin denitions.
Fan Connectors
Pin# Denition
1 Ground
2 +12V
3 Tachometer
4 NC
7. - 12. SAS Connectors
The primary and secondary sets of SAS
connectors provide expander features in-
cluding cascading and failover. From right
to left the ports are Primary 1, Primary 2,
Primary 3 and Secondary 1, Secondary 2
and Secondary 3. Note that secondary SAS
ports are not present on the BPN-SAS2-
836EL1 backplane.
13. - 14. UART Connectors
The primary and secondary UART con-
nectors are for manufacturer's diagnostic
purposes only. (The secondary UART con-
nector is not present on the SAS2-836EL1
model backplane)
15. - 16. Debug Connectors
The primary and secondary EXPDBG1 and
EXPDBG2 connectors are for manufactur-
er's diagnostic purposes only. (The second-
ary EXPDBG2 connector is not present on
the BPN-SAS2-836EL1 model backplane)
17. - 18. MDIO Connectors
The primary and secondary MDIO1 and
MDIO2 connectors are for Supermicro's
internal use only. (The secondary MDIO2
connector is not present on the BPN-SAS2-
836EL1 model backplane)
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