Supermicro SC846BE1C-R1K28B User Manual page 87

B-5 Rear Connector and Pin Definitions
1. MG9072 Chip
The MG9072 is an enclosure management
chip that supports the SES-2 controller and
SES-2 protocols.
2. Upgrade Connectors
The upgrade connectors are designated JP69,
JP78, and JP115 and are used for manufactur-
er's diagnostic purposes only.
3. Activity LED Header
The activity LED header, designated JP26,
JP47 and JP108, is used to indicate the activ-
ity status of each SAS drive. The Activity LED
Header is located on the front panel. For the
Activity LED Header to work properly, connect
using a 10-pin LED cable.
4. - 6. I C Connectors
2
The I C Connectors, designated JP37, JP95,
2
JP52, JP96, JP116, and JP117, are used to
monitor HDD activity and status. See the table
on the right for pin definitions.
Appendix B: SAS-846TQ Backplane Specifications
B-5
I C Connector
2
Pin Definitions
Pin# Definition
1 Data
2 Ground
3 Clock
4 No Connection