E-4
SC847 Chassis Manual
E-6 Front Connector and Pin Definitions
2. Primary and Secondary Flash Chips
The Primary and Secondary Flash Chips en-
hance the backplane memory.
1. EPP Ports
The EPP ports are used for manufacturer di-
agnostic purposes only.
Backplane
Main Power
4-Pin Connector
(PWR0, PWR1,
and PWR3)
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
4. Backplane Main Power Connectors
The 4-pin connectors, designated PWR0,
PWR1, and PWR3, provide power to the
backplane. See the table on the right for pin
definitions.
5. Fan Connectors
The 3-pin connectors, designated Fan1, Fan2,
and Fan3, provide power to the fans.
See the table on the right for pin definitions.
Fan Connectors
(Fan1, Fan2, and Fan3)
Pin# Definition
1
Ground
2
+12V
3
Tachometer
3. Primary and Secondary Expander Chips
This Primary and Secondary Expander Chips
allow the backplane to support dual port, cas-
cading, and failover configurations.
6. - 9. SAS Ports
Primary and secondary SAS ports.
Summary of Contents for SC847 Series
Page 12: ...SC847 Chassis Manual 1 4 Notes...
Page 32: ...2 20 SC847 Chassis Manual Notes...
Page 53: ...5 15 Chapter 5 Chassis Setup and Maintenance Figure 5 14 Placing the System Fan...
Page 76: ...SC847 Chassis Manual B 2 Notes...
Page 86: ...C 10 SC847 Chassis Manual Notes...
Page 96: ...D 10 SC847 Chassis Manual Notes...
Page 118: ...E 22 SC847 Chassis Manual Notes...
Page 187: ...H 23 Appendix H SAS2 846EL Backplane Specifications Notes...