mini-box M3-ATX-HV Installation Manual

GND

+

Switch Logic

6-24V DC-DC

ATX PSU

PC

ATX power

Mother

Board

ON/OFF switch

M3-ATX

-HV

Battery

Ignition SW

-

+

Serial

ctlr

8bit MCU

Amplifier

Enable

Reverse and

forward protection

Status LED

M3-ATX-HV

6-34V Intelligent ATX Power Supply

Installation Guide

Version 1.0c

P/N M3-ATX-HV-01

Before you start…

Please take a moment and read this manual before you install the M3-ATX-HV
in your
vehicle. Often times, rushing into installing the unit can result in serious damage
to your M3-ATX-HV board, computer and probably your car’s electrical system.
Always double check the polarity of your wires with a voltmeter.

Avoid using the cigarette plug as a power source, often times the contacts are
not capable of delivering high current to your PC.

Introduction

Thank you for purchasing the M3-ATX-HV power sequencer / vehicle ATX
power supply.

The M3-ATX-HV was designed to work with a wide variety of main boards such
as the VIA mini-ITX motherboards as well as Pentium-M / Celeron or full power
Pentium systems.

M3-ATX-HV Logic Diagram

1.2 M3-ATX-HV

Connection diagram

(M3-ATX pictured, electrically identical with M3-ATX-HV)

http://mini-box.com, Embedded PC Solutions

M3-ATX-HV User Guide Page 2

Power Input Connectors (right side)
Red Battery + (positive, un-switched battery)
Black Battery - (negative)
White Ignition (To start connect to Battery +).

Do not use in the standard PSU mode (mode P0)

Power Output Connectors (left side)

Hard drive wire harness (HDD, SATA-HDD, Floppy)

ON/OFF and THUMP wire harness (connects to M3-ATX-HV pin header)

-ON/OFF wire harness (red/back) to connect to motherboard’s ON/OFF pin
headers.

-THUMP (white) to connect to amplifier remote ON/OFF connector.

Wire harness for motherboard
ON/OFF switch and Thump
control (optional)

Wire harness for serial
connection.

IMPORTANT:

Always use the “Hibernate” feature on your PC, never use “Standby”.
P0: In this mode, the M3-ATX-HV behaves like a regular ATX power supply.

Do not use Ignition switch in this mode.

P Off-delay Hard-off
P0 Standard PSU mode

P1 5sec 1 min
P2 1 min 5 min
P3 30 min 2 hour
P4 custom custom