SUPER MICRO Computer SAS-826A manual Front Connector and Pin Definitions, #1. Activity LED Headers

SAS-826A Backplane User's Guide

2-2 Front Connector and Pin Definitions

#1. Activity LED Headers

The activity LED headers, designated JP26 and JP47, are used to indicate the activity status of each SAS drive. The activity LED headers are located on the front panel. For the activity lead headers to work properly, connect to them using a 10-pin LED cable. This is only used when the activity LED is not supported by the hard drive.

SAS Activity LED Header

Pin Definitions (JP26)

Pin #	Definition	Pin #	Definition
1	ACT IN#0		ACT IN#4
		6
2	ACT IN#1		ACT IN#5
		7
3	ACT IN#2		ACT IN#6
		8
4	ACT IN#3		ACT IN#7
		9
5	Ground		Empty
		10
	SAS Activity LED Header
	Pin Definitions (JP47)
Pin #	Definition	Pin #	Definition
1	ACT IN#8		ACT IN#12
		6
2	ACT IN#9		ACT IN#13
		7
3	ACT IN#10		ACT IN#14
		8
4	ACT IN#11		ACT IN#15
		9
5	Ground		Empty
		10

#2. MG9071 and MG9072 Chips

The MG9071 and MG9072 are enclosure management chips that support the SES-2 controller and SES-2 protocols.

#3., #4., #5. I2C Connectors

The I2C Connectors, designated JP37, JP52, and JP95, are used to monitor HDD activity and status. See the table on the right for pin definitions.

I2C Connector

Pin Definitions

(JP37, JP52,

and JP95)

Pin# Definition

1Data

2Ground

3Clock

4No Connection

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