Chassis SC822 User's Manual Rear Connector Pin Definitions 1, 2. Backplane Power Connectors These 4-pin connectors, designated JP10 and JP13, supply power to the backplane. 3. Activity LED Header The activity LED header, designated JP26, is used to indicate the activity status of each SATA drive. The Activity LED Header is located on the rear of the backplane. For the Activity LED Header to work properly, connect using a 10-pin LED cable. 4, 5. I 2 C Connectors (BPN-SAS-823TQ only) The I 2 C Connectors, designated JP44 and JP45, are used to monitor HDD activity and status. 6, 7. Sideband Headers (BPN-SAS-823TQ only) The sideband headers are designated JP51 and JP52.
For SES-2 to work properly, you must connect an 8-pin sideband cable to JP51 and JP52. 8. MG9072 Chip (BPN-SAS-823TQ only) The MG9072 is an enclosure management chip that supports the SES-2 controller and SES-2 protocols.
60 SATA Activity LED Header Pin Definitions Pin Definition Pin Definition 1 ACT IN#0 6 ACT IN#4 2 ACT IN#1 7 ACT IN#5 3 ACT IN#2 8 ACT IN#6 4 ACT IN#3 9 ACT IN#7 5 Ground 10 Empty I2C Connector Pin Definitions Pin Definition 1 Data 2 Ground 3 Clock 4 No Connection Sideband Headers Pin Definitions Pin Definition Pin Definition 2 Backplane Addressing (SB5) 1 Controller ID (SB6) 4 Reset (SB4) 3 GND (SB2) 6 GND (SB3) 5 SDA (SB1) 8 Backplane ID (SB7) 7 SCL (SB0) 10 No Connection 9 No Connection