DFI BT551 - System Management and Security Connectors; SMBus Connector; Chassis Intrusion Connector

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Chapter 2 Hardware Installation
Chapter 2
The SMBus (System Management Bus) connector is used to connect SMBus devices. It is a
multiple device bus that allows multiple chips to connect to the same bus and enable each one
to act as a master by initiating data transfer.
SMBus Connector
1
2
5
6
GND
+3.3V_standby
SMBUS_DataSMBUS_CLK
NCSMBUS_Alert#
SMBus
Chassis Intrusion Connector
The board supports the chassis intrusion detection function. Connect the chassis intrusion
sensor cable from the chassis to this connector. When the system’s power is on and a chassis
intrusion occurred, an alarm will sound. When the system’s power is off and a chassis intrusion
occurred, the alarm will sound only when the system restarts.
1
2
Ground
Signal
Chassis
Intrusion