2.8Connectors

This section describes and illustrates the internal connectors on the motherboard.

1.Chassis alarm lead (4-1 pin U79)

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.

NR-LSR

NR-LSR Chassis Open Alarm Lead

U79

+5Volt Supply Stand By)

Chassis Signal

Ground

(Power

 

 

2.Serial port 2 connector (10-1 pin COM2)

This connector accommodates a second serial port using an optional serial port bracket. Connect the bracket cable to this connector then install the bracket into a slot opening at the back of the system chassis.

COM2

1

NR-LSR

NR-LSR Serial COM2 Connector

ASUS NR-LSR motherboard user guide

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