Appendix E: SAS2-846EL Backplane Specifications
E-13 Supported Cascading Configurations
Cascading allows the system to access data at a faster rate by allowing several
backplanes to share resources to reduce latency time.
The first backplane in a cascaded system requires a motherboard and an HBA.
Other servers require a power control card with no motherboard and no HBA. For
more information, see the SC846 Chassis Manual available at www.supermicro.
com.
Cable 0167L
(internal cable)
Cable 0167L
(Internal cable)
Cable 0166L
(External cable)
Single Port Cable
Assembly
Power Card
Power Card
+
+
EC
20
+
EC17
L1
R4635
FANFAIL1
A C
MH14
A C
FANFAIL_LED_DISABLE
PRI_J0
C300
+
EC
10
+
EC
9
+
EC
8
+
+
EX
PD
BG
2
UA
RT_
S
+
+
EC
4
+
+
EC
3
+
EC
29
+
EC
28
+
EC
26
+
EC
2
1
+
EC
25
+
EC
24
+
+
EC
22
+
EC
2
+
EC
15
+
EC
14
+
EC
13
+
+
+
L147
BUZZE
R1
+
DESIGNED IN USA 1
1 1
TLED1
FAN_MONIT
OR_DISABLE
1
BPN-SAS2-846EL2
BUZZER_ENB1
1 1
M
DI
O1
M
DI
O2
12V_LED
A
C
5V_LED
A
C
C A
CT25
1 C
A
T24
C367
C872
1
3
SEC_M
ODE2
1
3
1
3
+
+
EC
19
C2972
+
C2973
+
+
C2970
+
+
+
EC
34
UA
RT_
P
4
+
C8
64
+
EC
16
+
+
+
+
C870
+
+
+
+
+
C866
+
+
C862
MH8
PRI_J2
PRI_J1
MH6
SEC_J1
SEC_J0
SEC_J
2
MH1
MH12
MH9
1
FAN1
4
PWR2
+12V GND GND +5V
1
FAN2
4 +12V GND GND +5V
+12V GND
GND +5V
4
1
J24
1
8
J25
1
8
5
10
15
20
25
28
Y
E
R
K
A
E
A
H
5
10
15
20
25
28
Y
E
R
K
A
E
A
H
SE
C_
F
LAS
H
1
2
EX
PD
BG
1
1
4
4
4
1
1
1
U
330
BAR CODE
+12V GND
GND +5V
PWR6
PWR
4
PWR5
+12V GND
GND +5V
PWR
3
+12V GND
GND +5V
WWN
WWN
REV
1.10
+
+
EC
20
+
EC17
L1
R4635
MH8
FANFAIL1
A C
A C
C300
+
EC
10
+
EC
9
+
EC
8
+
+
+
EC
5
EC
4
+
+
EC
3
+
EC
29
+
EC
28
+
EC
26
+
EC
2
1
+
EC
25
+
EC
24
+
+
EC
22
+
+
EC
15
+
EC
14
+
EC
13
EC
1
2
+
+
EC
11
+
BPN-SAS2-846EL2
BUZZER_ENB1 FAN_MONITOR_DISABLE
REV 1.10
MH9
DESIGNED IN USA 1
1 1
ACTLED1
BUZZER1
+
1
ANFAIL_LED
_DISABLE
1 1
M
DI
O1
M
DI
O2
12V_LED
A
C
5V_LED
A
C
C A
ACT25
1 C
A
T24
C367
C872
1
3
SEC_M
ODE2
1
3
PRI_MOD
E2
1
3
+
+
EC
19
C2972
+
C2973
+
+
C2970
+
+
+
+
EC
34
UA
RT_
P
4
+
C8
64
+
+
+
+
+
+
+
+
+
+
C866
+
+
C862
MH1
MH6
MH14
MH12
1
FAN1
4
PWR2
+12V GND GND +5V
1
FAN2
4 +12V GND GND +5V
+12V GND
GND +5V
4
1
1
8
1
8
5
10
15
20
25
28
R
Y
E
K
A
E
A
H
5
10
15
20
25
28
R
Y
E
K
A
E
A
H
SE
C_
F
LAS
H
1
2
EX
PD
BG
1
1
4
EX
PD
BG
2
UAR
T
_S
4
4
1
1
1
U
330
BAR CODE
+12V GND
GND +5V
PWR6
PWR
4
PWR5
+12V GND
GND +5V
PWR
3
+12V GND
GND +5V
PWR
1
WWN
WWN
+
+
EC
20
+
EC17
R4631
FANFAIL1
A C
OVERHEA
C300
+
EC
9
+
+
+
EC
6
+
EC
5
EC
4
+
+
EC
3
+
EC
29
+
EC
28
+
EC
26
+
EC
25
+
+
+
EC
22
+
+
EC
2
+
EC
15
+
+
EC
13
+
+
EC
10
+
EC
1
EC
34
UAR
4
+
+
1
+
+
+
BUZZE
R1
+
DESIGNED IN USA 1
1 1
CTLED1
BPN-SAS2-846EL2
BUZZER_ENB1
FAN_MONITOR_DISABL
E
REV 1.10
1
ANFAIL_LED
_DISABLE
1 1
M
DI
O1
M
DI
O2
MH14
A C
12V_LED
A
C
A
C
C
A
1
C A
C367
C872
PRI
_M
O
D
E1
1
3
SEC_M
ODE2
1
3
1
3
+
C2973
+
+
C2970
+
+
+
PR
I_
I2
C
1
8
EC
16
+
+
+
+
+
C870
C869
+
+
+
+
+
C865
+
+
1
4
C861
PRI_J
0
PRI_J2
PRI_J1
MH6
SEC_J2
SEC_J1
SEC_J0
MH1
MH4
MH8
MH12
MH9
1
FAN1
4
PWR2
+12V GND GND +5V
1
FAN2
4 +12V GND GND +5V
4
1
J24
1
8
J25
5
10
15
20
25
28
Y
E
R
K
A
E
A
H
5
10
15
20
25
28
Y
E
R
K
A
E
A
H
SE
C_
F
LAS
H
PRI
_F
LAS
H
1
2
EX
PD
BG
1
EX
PD
BG
2
4
4
1
1
UAR
T_
S
U
330
BAR CODE
+12V GND
GND +5V
+12V GND
GND +5V
PWR5
+12V GND
GND +5V
+12V GND
GND +5V
WWN
WWN
Figure E-16: Simple Cascaded Configurations
Secondary Port
Expander 2
E-21
Secondary Port
Expander 2
Primary Port
Expander 1
Primary Port
Expander 1
Primary Port
Expander 1
Secondary Port
Expander 2
HBA