ASROCK Rack C2550D4I User Manual download pdf (Page 26)

PLED (System Power LED):

Connect to the power status indicator on the chassis front panel.

The LED is on when the system is operating. The LED keeps

blinking when the sys-tem is in S3 sleep state. The LED is off

when the system is in powered off (S5).

HDLED (Hard Drive Activity LED):

Connect to the hard drive activity LED on the chassis front panel.

The LED is on when the hard drive is reading or writing data.

The front panel design may differ by chassis. A front panel module

mainly consists of power switch, reset switch, power LED, hard

drive activity LED and etc. When connecting your chassis front

panel module to this header, make sure the wire assignments and

the pin assignments are matched correctly.

Auxiliary Panel Header

(18-pin AUX_PANEL1)

(see p.13 or 15, No. 14)

This header supports mul-

tiple functions on the front

panel, including front panel

SMB, internet status indica-

tor.

GND

12C_4_CLK#

12C_4_DATA#

+5VSB

LAN1_LINK

LED_PWR

LAN2_LINK

LED_PWR

+5VSB

GND

LOCATORLED1+

LOCATORLED1-

LOCATORBTN#

LOCATORLED2+

LOCATORLED2-

A. Front panel SMBus connecting pin (6-pin FPSMB)

This header allows you to connect SMBus (System Management

Bus) equipment. It can be used for communication between

peripheral equipment in the system, which has slower

transmission rates, and power management equipment.

B. Internet status indicator (2-pin LAN1_LED, LAN2_LED)

These two 2-pin headers allow you to use the Gigabit internet

indicator cable to connect to the LAN status indicator. When this

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C. Locator LED (6-pin LOCATOR)

This header is for the locator switch and LED on the front panel.

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ASROCK Rack C2550D4I User Manual Page 26

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