SUPER MICRO Computer S120T Overheat LED/Fan Fail JOH1, Power LED/Speaker, Sgpio Headers

SERIES3800/S120T (7045A-C3/7045A-CT) User's Manual

Overheat LED/Fan Fail (JOH1)

The JOH1 header is used to connect an LED to provide warning of chassis overheating. This LED will blink to in- dicate a fan failure. Refer to the table on right for pin definitions.

OH/Fan Fail LED

States

State	Message
Solid	Overheat
Blinking	Fan Fail

Overheat LED

Pin Definitions (JOH1)

Pin# Definition

15vDC

2OH Active

Power LED/Speaker

On JD1 header, pins 1-3 are for a power LED and pins 4-7 are for the speaker. Close pins 4-7 with a jumper to use an external speaker. If you wish to use the onboard speaker, please close pins 6-7. See the table on the right for speaker pin definitions.

Universal Serial Bus (USB)

There are two Universal Serial Bus ports located on the I/O panel

Power LED/Speaker

Connector (JD1)

Pin Setting	Definition
Pins 6-7	Internal Speaker
Pins 4-7	External Speaker

Universal Serial Bus

Pin Definitions (USB)

(USB0/1/2/3), four USB headers located on the serverboard (USB4/5 and USB6/7) and two additional ports located on the board itself (USB8 and USB9). The headers can be used to provide front side USB access (cables not included). See the table on the right for pin definitions.

USB0/1/2/3/8/9

Pin # Definition

1+5V

2PO-

3PO+

4Ground

5N/A

USB4/5, USB6/7

Pin # Definition

1+5V

2PO-

3PO+

4Ground

5Key

SGPIO Headers

SGPIO Header

Pin Definitions (T-SGPIO-1/T-SGPIO-2)

The SGPIO (Serial General Purpose Input/Output) headers are used to communicate with a system-monitor- ing chip on the backplane. See the table on the right for pin definitions.

Pin# Definition

1 NC

3 Ground

5Load

7Clock

Pin

2

4

6

8

Definition

NC

DATA Out

Ground

NC

NC = No Connection

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