C-3
Appendix C: BPN-SAS3-825MTQ Backplane Specifications
Backplane
Main Power
4-Pin Connector
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
C-5 Rear Connector and Pin Definitions
3. - 4. DVD-ROM 4-Pin Connectors
The 4-pin connectors, designated J9 and J10,
provide power to the DVD-ROM drive.
CD-ROM/
FDD Power
4-Pin Connector
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
5. MG9071 Chip
The MG9071 is an enclosure management
chip.
2. Sideband Connector
The sideband connector is designated JP51.
For SES-2 to work properly, you must connect
an 8-pin sideband cable to JP51.
Sideband Connector
Pin # Definition Pin # Definition
2
SDataIn
(SGPIO
Data In)
1
N/C
4
SDataIn
(SGPIO
Data Out)
3
GND
6
GND
5
SLoad
(SGPIO
Load)
8
N/C
7
SClock
(SGPIO
Clock)
1. Main Power Connector
The 4-pin connector, designated JP10, pro-
vides power to the backplane.
6. MG9071 Upgrade Header
The upgrade header, designated JP46, is for
manufacturing purposes only.
7. - 9. SAS Ports
The SAS ports are used to connect the drive
cables. The three ports are designated #0 - #2
and are compatible with SAS/SATA drives.
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