
D-5
Appendix D: SAS2-847EL Backplane Specications
6. Fan Connectors
The 4-pin connectors, designated FAN1,
through FAN4, provide power to the fans.
See the table on the right for pin deni-
tions.
Fan Connectors
Pin# Denition
1 Ground
2 +12V
3 Tachometer
4 Empty
7. - 10. SAS Ports
The primary and secondary sets of SAS
ports provide expander features including
cascading and failover. From right to left the
ports are Primary 0, Primary 1 and Second-
ary 0, Secondary 1. Note that secondary
SAS ports are not present on the SAS2-
847EL1 backplane.
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