2-3
Safety Information and Technical Specifi cations
6. Fan Connectors
The 4-pin connectors, designated FAN1,
through FAN4, provide power to the fans.
See the table on the right for pin defi ni-
tions.
Fan Connectors
Pin# Defi nition
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.
