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Dual Port and Cascading Configurations
E-8
Single and Dual Port Expanders
SAS primary connectors J49 to J50 and secondary connectors J51 to J52 are
bidirectional and can be treated as input or output.
Single Ports
BPN-SAS3-846EL1 backplanes have a single port expander that accesses all of
the drives and supports cascading.
Not Present on EL1 Models
Q866
BC10
MH17
EC3
MH18
1
2
3
MH19
Figure E-5 BPN-SAS3-846EL1 Single Port Configuration
Dual Ports
BPN-SAS3-846EL2 model backplanes have dual-port expanders that access all
of the hard drives. These dual-port expanders support cascading, failover, and
recovery.
Port B: Secondary Expander Ports
From HBA#2 or
Higher Backplane To Lower Backplane in
Q866
BC10
MH17
EC3
MH18
1
2
3
MH19
Figure E-6. BPN-SAS3-846EL2 Dual Port Configuration
Appendix E: BPN-SAS3-846EL Backplane Specifications
Secondary Expander
J47
EXP I2C4
1
3
1
J48
3
MH13
Q872
EXP I2C0
Q871
4
4
2
U35
2
Q873
J29
4
S_SDB
BC29
4
1
U51
1
JP4
A
S_MDIO
OVERHEATFAIL1
C
EC2
1
C233 C236
EC8
EC6
L4
4
14
6
C354
L6
U30
EC12
EC9
HS2
U31
L10
1
5
10
15
A
+
SEC
E
TP36
K
R
J52 J51
Y
MH20
L3
AE
AK
EC11
EC10
1
4
PWR4
1
4
PWR5
J52
J51
PRESS FIT
PRESS FIT
D1
D1
D7
H7
D7
U33
D8
H1
D8
CG2
H2
H8
D2
D2
G7
CG5
CG2
C7
C1
C7
G1
C1
C2
C2
C8
G2
G8
C8
6
F7
B7
B1
B7
B1
F1
1
4
12
B2
B8
F1
F2
F8
B2
B8
A1
CG4
CG1
A1
A7
E1
E7
A7
E1
PWR6
A8
E2
A8
CG1
E8
A2
A2
MH21
+12V
GND
+5V
From HBA or
Higher Backplane
Cascaded System
J47
EXP I2C4
1
3
1
J48
3
MH13
Q872
EXP I2C0
Q871
4
4
2
2
U35
Q873
J29
4
S_SDB
BC29
4
1
U51
1
JP4
A
S_MDIO
OVERHEATFAIL1
C
EC2
1
C233 C236
EC8
EC6
L4
4
14
6
C354
L6
U30
EC12
EC9
HS2
U31
L10
1
5
10
15
SEC
A
+
E
TP36
K
R
J52 J51
Y
MH20
L3
AE
AK
EC11
EC10
1
4
PWR4
1
4
PWR5
J52
J51
D1
PRESS FIT
PRESS FIT
D1
D7
H7
D7
U33
H1
D8
D8
CG2
H2
H8
D2
D2
G7
CG5
CG2
C7
C1
C7
G1
C1
C2
C2
C8
G2
G8
C8
6
F7
B7
B1
B7
B1
F1
1
4
12
B2
B8
F1
F2
F8
B2
B8
A1
E7
CG4
CG1
A1
A7
A7
E1
E1
PWR6
A8
E2
A8
CG1
E8
A2
A2
MH21
+12V
GND
+5V
From HBA#1 or
Higher Backplane
Port A
Primary Expander 1
MH14
MH15
L7
Q870
12V_LED1
22
C
L2
+
BC57
A
Q869
C177
11
12
C
U29
L9
A
C
22
12
C165 C107
U26
A
C
A
C206
U21
U4
EC20
EC18
U3
5
5
5
5
1
1
1
1
A
E
H
U19
A
E
H
A
A
E
E
H
H
HS1
TP94
TP15
20
25
30
MH22
TP95
10
U1
PRI
MH24
J50 J49
CS21
BPN-SAS3-846EL2
REV:1.01
DESIGNED IN USA
J50
J49
CG5
CG2
D1
PRESS FIT
PRESS FIT
H1
H7
D7
H1
H7
D1
D7
H7
H8
H1
H2
D2
D8
H2
H8
D2
D8
H2
H8
G7
C7
G7
CG5
CG2
C7
G7
CG5
G1
C1
G1
C1
G1
G2
C2
C8
C2
G2
G8
G2
G8
C8
G8
F7
B1
B7
B7
F7
F1
F7
B1
F1
B2
B2
F2
F2
F8
B8
F2
F8
B8
F8
PWR2
CG4
CG1
A1
E7
CG4
CG1
A1
E1
CG4
1
E7
A7
E1
A7
E7
+12V
E2
A8
E2
A8
E2
E8
A2
E8
A2
E8
MH25
MH23
BC96
R65
To Lower Backplane
in Cascaded System
Port A: Primary Expander Ports
MH14
MH15
L7
Q870
12V_LED1
22
C
L2
+
BC57
A
Q869
C177
11
12
C
U29
L9
A
C
22
12
C165 C107
U26
A
C
A
C206
U21
U4
EC20
EC18
U3
5
5
5
5
1
1
1
1
A
E
H
U19
A
E
H
A
A
E
E
H
H
HS1
TP94
TP15
20
25
30
MH22
TP95
10
U1
PRI
MH24
J50 J49
CS21
BPN-SAS3-846EL2
REV:1.01
DESIGNED IN USA
J50
J49
PRESS FIT
PRESS FIT
CG5
CG2
D1
D1
H1
H7
D7
H1
H7
D7
H7
H1
H2
H8
H8
D2
D8
H2
H8
D2
D8
H2
G1
G7
C7
G7
CG5
CG2
C7
G7
CG5
C1
G1
C1
G1
G2
C2
C8
C2
G2
G8
G2
G8
C8
G8
F7
B1
B7
B7
F7
F1
F7
B1
F1
B2
B2
F2
F2
F8
B8
F2
F8
B8
F8
PWR2
E7
CG4
CG1
A1
A7
E7
CG4
CG1
A1
E1
E7
CG4
1
E1
A7
+12V
E2
E8
A8
E2
A8
E2
E8
A2
E8
A2
MH23
MH25
BC96
R65
To Lower Backplane
in Cascaded System
E-9
LED Testing Only
MH16
ACTLED
J30
P_UART
1
1
4
4
Q867
1
4
JP3
1
J31
P_MDIO
P_SDB
C122
+
11
MH26
+
L5
C76
+
F73
WWN
22
12
U28
11
WWN
L8
+
1
4
PWR1
+12V
GND
+5V
1
4
19
18
13
PWR3
7
4
GND
+5V
+12V
GND
+5V
MH27
LED Testing Only
MH16
ACTLED
J30
P_UART
1
1
4
4
Q867
1
JP3
4
1
J31
P_MDIO
P_SDB
C122
+
11
MH26
+
L5
C76
+
F73
WWN
22
12
U28
11
WWN
L8
+
1
4
PWR1
+12V
GND
+5V
1
4
19
18
13
PWR3
7
4
GND
+5V
+12V
GND
+5V
MH27
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