9. ATX power connectors (24-pi n EATXPWR, 4-pi n ATX12V)

These connectors are for an ATX power supply. The plugs from the power supply are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.

•We recommend that you use an ATX 12 V Specification

2.0‑compliant power supply unit (PSU) with a minimum of 300 W power rating. This PSU type has 24-pin and 4-pin power plugs.

•If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the 20-pin power plug can provide at least 15 A on +12 V and that the PSU has a minimum power rating of 300 W. The system may become unstable or may not boot up if the power is inadequate.

•Do not forget to connect the 4-pin ATX +12 V power plug; otherwise, the system will not boot up.

•We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices. The system may become unstable or may not boot up if the power is inadequate.

•You must install a PSU with a higher power rating if you intend to install additional devices.

EATX12V

 

+12V DC

+12V DC

 

 

GND

GND

 

 

EATXPWR

 

+3

Volts

Ground

 

+12

Volts

+5 Volts

 

+12

Volts

+5 Volts

M2N-MX

+5V Standby

+5 Volts

 

Power OK

-5 Volts

 

Ground

Ground

 

+5

Volts

Ground

 

Ground

Ground

 

+5 Volts

PSON#

M2N-MX ATX Power Connector Ground

Ground

 

+3

Volts

-12 Volts

 

+3

Volts

+3 Volts

1-28

Chapter 1: Product introduction