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6. Fan Connectors
The 4-pin connectors, designated FAN1
through FAN3, provide power to the fans.
See the table on the right for pin definitions.
7. - 12. SAS Connectors
The primary and secondary sets of SAS
connectors provide expander features
including 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 connectors
are for manufacturer's diagnostic purposes
only. (The secondary UART connector is
not present on the SAS2-836EL1 model
backplane)
15. - 16. Debug Connectors
The primary and secondary EXPDBG1
a n d E X P D B G 2 c o n n e c t o r s a r e f o r
manufacturer's diagnostic purposes only.
(The secondary 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)
Appendix C Backplane Specifications
Pin#
C-21
Fan Connectors
Definition
1
Ground
2
+12V
3
Tachometer
4
NC
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