Asus Motherboard PR-DLS533 User Manual Page 46

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2-20
Chapter 2: Hardware information
4. Chassis alarm lead (4-1 pin CHASSIS)
This lead is for a chassis designed with intrusion detection feature.
This requires an external detection mechanism such as a chassis
intrusion sensor or microswitch. When you remove any chassis
component, the sensor triggers and sends a high-level signal to this
lead to record a chassis intrusion event.
By default, the pins labeled Chassis Signal and Ground are shorted
with a jumper cap. If you wish to use the chassis intrusion detection
feature, remove the jumper cap from the pins.
5. SMBus connector (6-1 pin SMB)
This connector allows you to connect SMBus (System Management
Bus) devices. Devices communicate with an SMBus host and/or other
SMBus devices using the SMBus interface. SMBus is a specific
implementation of an I
2
C bus, a multi-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.
PR-DLS533
PR-DLS533 Chassis Open Alarm Lead
CHASSIS
+5Volt
(Power Supply Stand By)
Chassis Signal
Ground
PR-DLS533
PR-DLS533 SMBus Connectors
SMB
1
SMBCLK
Ground
SMBDATA
+3V
FLOATING
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