1.10.2 Internal connectors Asus prime Asus M3A78-EM

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Chapter 1: Product introduction

11.. Chassis.intrusion.connector.(4-1.pin.CHASSIS)

This connector is for a chassis-mounted intrusion detection sensor or switch. 

Connect one end of the chassis intrusion sensor or switch cable to this 

connector. The chassis intrusion sensor or switch sends a high-level signal to 

this connector when a chassis component is removed or replaced. The signal 

is then generated as a chassis intrusion event.
By default, the pins labeled “Chassis Signal” and “GND” are shorted with 

a jumper cap. Remove the jumper caps only when you intend to use the 

chassis intrusion detection feature.

M3A78-EM Intrusion Connector

R

M3A78-EM

CHASSIS

+5VSB_MB

Chassis Signal GN

D

(Default)

12.. IEEE.1394a.port.connector.(10-1.pin.IE1394_1)

This connector is for a IEEE 1394a port. Connect the IEEE 1394a module 

cable to this connector, then install the module to a slot opening at the back 

of the system chassis. 

M3A78-EM 

IEEE 1394a Connector

R

M3A78-EM

IE1394_1

GN

D

+12V

TPB1

-

GN

D

TP

A1

-

+12V

TPB1

+

GN

D

TP

A1

+

1