C-5
SAS-733TQ Backplane Specifications
The Activity LED header JP26 trans-
mits signals to indicate the activity sta-
tus of each SAS slot. For the Activity
LED header to work properly, connect
a 4-pin LED cable to Pin 1 to Pin 4 of
JP26 as shown on the right. See the
table on page C-6 for pin definitions.
The sideband header is designated
JP51. For SAS-II to work properly,
connect an 8-pin sideband cable to
JP51 as shown on the right. .
You must use the 4-pin power con-
nectors JP10 and JP13 to provide
adequate power to the backplane.
See the table on the right for pin
definitions.
The 3-pin fan header is designated
JP22. To prevent overheating, con-
nect a 3-pin fan cable to JP22. See
the table for pin definitions.
Note:
The fan header uses DC power.
Default: Fan disabled.
C-5 Front Connector Pin Definitions
Backplane Main Power Connectors (JP10, JP13) Pin Definitions
1. Sideband Header - JP51
2. Activity LED Header - JP26 Pin Definitions
3. 3-pin Fan Header - JP22 Pin Definitions
4. Front Overheat/Drive Failure LED Indicators - D3/D4
SB6 } Controller ID
SB2 } GND
SB1 } SDA
SB0 } SCL
No Connection
Backplane
Addressing { SB5
Reset { SB4
GND { SB3
Backplane ID { SB7
No Connection
Sideband Pin Definitions (JP51)
2
6
10
4
8
1
5
9
3
7
SB6 } Controller ID
SB2 } GND
SB1 } SDA
SB0 } SCL
No Connection
Act In#0 {
Reset { SB4
GND { SB3
Backplane ID { SB7
No Connection
Note 1: "NC" = No connection
Note 2: Connect a 4-pin LED cable to
Pin1 - Pin4 of JP26 only.
SAS Activity LED (JP26)
1
3
5
2
4
6
8
7
9
Backplane Main Power
4-Pin Connectors (JP10, JP13)
Pin # Definition
1 +12V
2 and 3 Gound
4 +5V
Ground (Black)
+12V (Red)
Tachometer
Definition
Pin
Number
1
2
3
Fan Header Pin Definitions
Caution: Fan headers are DC Powered
