A SERVICE OF

logo

2-4
SAS-826A Backplane User's Guide
JSM1
JSM3
JSM2
DESIGNED IN USA
JP46
14
JP13
JP10
1
4
Y2
Y1
F1
F2
F3
U40
1
11
12
22
23
33
34
U19
49
48
33
32
17
16
1
BZ1
C33
C94
C132
C32
C100
+
C285
+
C119
+
C197
+
C198
+
C201
+
C202
+
C3
+
C44
+
C45
+
C5
+
C84
+
C85
C138
C1
C208
C107
C145
C215
C86
C87
C88
C213
C271C272
CA
D53
CA
D54
C
A
D3
C
A
D36
RT2
JP18
JP35
JP50
R330
R336
R337
R141
R376
R94
R208
R423
R422
R325
R201
R257
R200
R425
R424
R347
R63
R226
R249
R98
R123
R120
R126
R6
R132
JP25
1
JP45
1
JP84
JP37
JP95
JP52
U24
U41
JP69
JP78
RP1
U2
JP26
JP47
U18
BAR CODE
+
B
B
SAS IN #1
SAS IN #2
9072 RST
9071 RST
ACT4
ACT11
ACT10
ACT9
ACT8
ACT3
ACT2
ACT1
ACT7
ACT6
ACT5
ACT0
2-3:I2C
1-2:SGPIO
JP84:MODE
C2-3:55
1-2:50 C
COPEN:45
JP45:OH#2 TEMP
C
C
C2-3:55
1-2:50
OPEN:45
JP25:OH#1 TEMP
ALARM#1
ALARM#2
ACT_IN#8-11
ACT_IN#0-7
UPGRADE#2
UPGRADE#1
SAS IN #3
I2C#3
I2C#2
I2C#1
BUZZER RESET
REV 1.00
SAS826A
JP18
JP35
JP84
JP50
2-3 Front Jumper Locations and Pin Denitions
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identied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.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
Jumper Settings
Jumper Jumper Settings Note
JP35
Open: Default
Closed: Reset
MG9072 Chip Reset #1
JP50
Open: Default
Closed: Reset
MG9071 Chip Reset #2
JP18
Open: Default
Closed: Reset
*Buzzer Reset #2
Figure 2-2: Front Jumpers
*The buzzer sound indicates that an overheat condition, a fan failure or a drive
failure has occurred.