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SC811 Chassis Manual
C-6 Front Connectors and Pin Definitions
#1. Backplane Main Power Connectors
The 4-pin connector designated JP10,
provides power to the backplane. See the
table on the right for pin definitions.
#2., #3. SAS Ports
The SAS ports are used to connect the
SAS drive cables.
#4. I
C Connector
2
The I
C Connector, designated JP44, is
2
used to monitor HDD activity and status.
See the table on the right for pin definitions.
#5. Sideband Header
The sideband header is designated JP51.
I
C is the default mode setting. For SES-
2
2 to work properly, you must connect an
8-pin sideband cable. See the table to the
right for pin definitions.
Pin#
1
2 and 3
4
Pin #
Definition
1
Ground
3
TXN
5
RXN
7
Ground
Pin#
1
2
3
4
Pin #
Definition
2
SGPIO:
SDIN;
I
C:
2
Backplane
Addressing
(SB5)
4
SGPIO:
SDOUT;
I
C: Reset
2
(SB4)
6
GND (SB3)
8
Backplane
ID (SB7)
10
No Connec-
tion
C-4
Backplane
Main Power
4-Pin Connector
(JP10)
Definition
+12V
Ground
+5V
SAS Port
Pin Definitions
Pin #
Definition
2
TXP
4
Ground
6
RXP
I
C Connector
2
Pin Definitions
(JP44)
Definition
Data
Ground
Clock
No Connection
Sideband Headers
(JP51)
Pin #
Definition
1
Controller
ID (SB6)
3
GND (SB2)
5
SGPIO:
SLOAD;
I
C: SDA
2
(SB1)
7
SGPIO:
SCLOCK;
1
C: SCL
2
(SB0)
9
No Connec-
tion
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