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SC825 Chassis Manual
C-7 Front Jumper Locations and Pin Definitions
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
JP36
1
1
JP29
JP18
JP50
48
48
1
1
JP38
16
16
32
32
JP33
JP29:9072 RESET
JP29:9072 RESET
Figure C-3. Front Jumpers
Explanation of Jumpers
To modify the operation of the backplane,
jumpers can be used to choose between
optional settings. Jumpers create shorts
between two pins to change the function
of the connector. Pin 1 is identified with
a square solder pad on the printed circuit
board. Note: On two pin jumpers, "Closed"
means the jumper is on and "Open" means
the jumper is off the pins.
Jumper Settings
Jumper
Jumper Settings
Open (Jumper off the pins): Default
JP29
Closed (Jumper on the pins): Reset
Open (Jumper off the pins): Default
JP18
Closed (Jumper on the pins): Reset
*The buzzer sound indicates that a condition requiring immediate attention has
occurred.
The buzzer alarm is triggered by the following conditions:
1. Hard drive failure
2. System temperature over 45º Celsius.
JP43
2
2
ACT_IN
ACT_IN
I C
I C
#2
#2
SIDEBAND #2
SIDEBAND #2
1
1
SAS825TQ
SAS825TQ
REV 2.0
REV 2.0
BAR CODE
BAR CODE
2
2
I C
I C
#1
#1
JP37
JP34
SIDEBAND #1
SIDEBAND #1
JP41
JP42
JP40
3
2
Connector
Pins
Open, jumper off
the pins.
Jumper
Closed, jumper on
the pins.
3
2
Setting
Note
MG9072 chip reset
Buzzer reset*
C-6
SGPIO and I
This backplane can utilize SGPIO or I
used without making changes to your jumpers. The following information describes
which jumper must be configured to use SGPIO mode.
Jumper
JP33
JP34
1
JP36
JP37
JP38
JP40
JP41
1
JP42
JP43
JP50
Appendix C: BPN-SAS-825TQ Backplane Specifications
C Modes and Jumper Settings
2
C, which is the default mode and can be
2
SGPIO Settings
Jumper Setting
Notes
Pins 1-2
Controller ID #1
Backplane ID #1
Pins 1-2
Pins 1-2: ID#0
Pins 1-2
Controller ID #2
Backplane ID #2
Pins 1-2
Pins 1-2: ID#0
Open (Jumper off the pins)
I
C Reset #2
2
Closed (Jumper on the pins)
I
C Reset_SDOUT#1
2
Closed (Jumper on the pins)
I
C Reset_SDOUT#2
2
Pins 1-2
I
C Backplane ID_SDIN#1
2
Pins 1-2
I
C Backplane ID_SDIN#2
2
Open (Jumper off the pins)
I
2
C Reset #1
C-7
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