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Seagate Enterprise Capacity 2.5 HDD v3 SAS Product Manual, Rev. D 52
11.4.2 Physical characteristics
This section defines physical interface connector.
11.4.3 Connector requirements
Contact a preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a future
revision of this publication when production parts are available from major connector manufacturers.
The SAS device connector is illustrated in Figures 11 and 12.
11.4.4 Electrical description
SAS drives use the device connector for:
• DC power
• SAS interface
• Activity LED
This connector is designed to either plug directly into a backpanel or accept cables.
11.4.5 Pin descriptions
This section provides a pin-out of the SAS device and a description of the functions provided by the pins.
Table 11 SAS pin descriptions
Pin Signal name Signal type Pin Signal name Signal type
S1 Port A Ground P1* NC (reserved 3.3Volts)
S2* +Port A_in
Diff. input pair
P2* NC (reserved 3.3Volts)
S3* -Port A_in P3 SAS Power Disable **
S4 Port A Ground P4 Ground
S5* -Port A_out
Diff output pair
P5 Ground
S6* +Port A_out P6 Ground
S7 Port A Ground P7 5 Volts charge
S8 Port B Ground P8* 5 Volts
S9* +Port B_in
Diff. input pair
P9* 5 Volts
S10* -Port B_in P10 Ground
S11 Port A Ground P11* Ready LED Open collector out
S12* -Port B_out
Diff output pair
P12 Ground
S13* +Port B_out P13 12 Volts charge
S14 Port B Ground P14* 12 Volts
P15* 12 Volts
* - Short pin to support hot plugging
** - Power Disable (T10 Industry Standard) for remote management of the end device. Allows power cycling / power saving to be controlled by the host via
interface pin 3.
NC - No connection in the drive.