ASROCK B550D4-4L - Page 34

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Front LAN LED
Connector
(LED_LAN_3_4)
(see p.6, No. 24)
1
LAN3_LINK
LED_PWR
LED_PWR
LAN4_LINK
is 4-pin connector is used
for the front LAN status
indicator.
Intelligent Platform
Management Bus Header
(4-pin IPMB_1)
(see p.6, No. 28)
IPMB_SDA
IPMB_SCL
GND
No connect
This 4-pin connector is used
to provide a cabled base-board
or front panel connection for
value added features and 3rd-
party add-in cards, such as
Emergency Management cards,
that provide management
features using the IPMB.
Baseboard Management
Controller SMBus Header
(5-pin BMC_SMB_1)
(see p.6, No. 29)
BMC_SMB_PRESENT_1_N
Power
BMC_SMBCLK
GND
BMC_SMBDATA
e header is used for the SM
BUS devices.
PSU SMBus Header
(PSU_ SMB1)
(see p.2, No. 4)
+3V
1
GND
ALERT
SMBCLK
SMBDATA
PSU SMBus monitors the
status of the power supply, fan
and system temperature.