2-3
Appendix B: BPN-SAS3-733TQ Backplane Specifications
2-2
SC721 Chassis Manual
2. I
2
C Connector
The I
2
C connector is designated JP44 and
is used to monitor HDD activity and status.
See the table on the right for pin definitions.
I
2
C Connector
Pin Definitions
Pin# Definition
1
Data
2
Ground
3
Clock
4
No Connection
SAS Activity LED
Pin# Pin#
Act In#0
1
6
NC
Act In#1
2
7
NC
Act In#2
3
8
NC
Act In#3
4
9
NC
NC
5
X
Empty
4. SAS/SATA Connectors
The SAS/SATA connectors are numbered
SAS#0, J5 through SAS#3, J8. Connect them
to the system with a SAS or SATA cable.
3. Sideband Header
The sideband header is designated
JP51. For SES-2 to work properly,
you must connect an 8-pin sideband
cable. See the table to the right for
pin definitions.
Sideband Headers
Pin # Definition
Pin # Definition
2
SDIN/
Backplane
Addressing
(SB5)
1
Controller
ID (SB6)
4
SDOUT/I
2
C
Reset
(SB4)
3
GND (SB2)
6
GND (SB3)
5
SLOAD/
SDA (SB1)
8
Backplane
ID (SB7)
7
SCLOCK/
SCL (SB0)
10
No Connec-
tion
9
No Connec-
tion
6. Fan Header
The fan header is designated FAN, JP22.
7. MG9071 Chip
The MG9071 is an enclosure management
chip that supports the SES-2 controller and
protocols.
5. Activity LED Header
The HDD activity LED header is designated
ACT-IN LED, JP26.
B-6 Front Connector and Pin Definitions
Backplane
Main Power
4-Pin Connector
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
Fan Header Pin Definitions
Pin# Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
1. Power Connectors
The 4-pin connectors are designated JP10 and
JP13 and provide power to the backplane. See
the table on the right for pin definitions.
Note 1: NC = No Connection
Note 2: Connect to a 4-pin LED
cable to Pin1-Pin4 of JP26 only
Note: Fan headers are
DC Power
Summary of Contents for PWS-251-1H
Page 1: ...SC721 CHASSIS SERIES SC721TQ 250B USER S MANUAL 1 0a ...
Page 7: ...SC721 Chassis Manual 1 4 Notes ...
Page 18: ...2 20 SC721 Chassis Manual Notes ...
Page 23: ...SC721 Chassis Manual 4 4 Notes ...
Page 33: ...SC721 Chassis Manual 5 18 Notes ...