mini-box M2-ATX-HV Installation Manual

GND

+

Switch Logic

6-32V DC-

DC

ATX PSU

PC

ATX power

MotherBoard

ON/OFF switch

M2

-

Battery

Ignition

-

SW

+

J8

LED

J5

J6

8bit MCU

Amplifier

Enable

J9

Reverse and

forward protection

Optional On/OFF switch

M2-ATX-HV

6-32V Intelligent Automotive ATX Power Supply

Installation Guide

Version 1.4 (firmware v1.5, 10/15/2009)

P/N M2-ATX-HV-02

Before you start…

Please take a moment and read this manual before you install the M2-ATX-HV­HV in your
vehicle. Often times, rushing into installing the unit can result in serious damage
to your M2-ATX-HV-HV board, computer and probably your car’s electrical
system.

The M2-ATX-HV-HV board has several wires that need to be installed in
various places.
When installing, 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.

1.0 Introduction

Thank you for purchasing the M2-ATX-HV-HV power sequencer / vehicle ATX
power supply.

The M2-ATX-HV-HV was designed to work with a wide variety of main boards
such as the VIA C3/C7/nano motherboards as well as AMD, Pentium-M
Celeron or Core2Duo processors.

1.1 M2-ATX-HV-HV Logic Diagram

http://mini-box.com, Cool Embedded PCs

M2-ATX-HV-HV User Guide Page 2

1.2 M2-ATX-HV-HV Connection diagram

M2-ATX-HV-HV, top view

Power Input Connectors
J1 Battery + (un-switched battery, positive)
J3 Ignition (To start connect to Battery +). Do not use in the standard

PSU mode (mode P0).

J4 Battery - (negative)

Controls and Settings
J6 Controls amplifier via remote ON/OFF. Left pin is RMT, Right pin is

GND

J8 To motherboard ON/OFF switch
J10 User jumper settings (A,B,C,D)
J9 To external ON/OFF switch (optional, J8 is in parallel with J9)

Power Output Connectors
J2 Optional P4-12V power
J7 ATX power connector (to motherboard)
J5 To LED (optional)

IMPORTANT:

Always use the
“Hibernate” feature,
never use “Standby”
as it can severely
discharge your
battery over
extended periods of
time.

NEVER use “Hard-

off = NEVER”
settings unless you
understand the risks
of battery depletion.
“Hard-off=NEVER
always keeps 5VSB
rail ON!

*AutoLatch is active during the fist 60s of PC operation (and only during the
first 60 seconds). For example, If Ignition is turned ON and then OFF right

Jumper attached=ON

A B C D

P

Off-delay
(All rails ON)

Hard-off
(5VSB)

OFF OFF OFF OFF

P0

Standard PSU mode

ON OFF OFF OFF

P1

5s + 1min AutoLatch* 1 min

OFF ON OFF OFF

P2

5s+ 1min AutoLatch* 2 hour

ON ON OFF OFF

P3

5s+ 1min AutoLatch* NEVER

OFF OFF ON OFF

P4

30s + 1min AutoLatch* 2 hour

ON OFF ON OFF

P5

30s + 1min AutoLatch* NEVER

OFF ON ON OFF

P6

30min NEVER

ON ON ON OFF

P7

3 hour NEVER

OFF OFF OFF ON

P8

10 min 1 hour

ON OFF OFF ON

P9

15 min 2 hours

OFF ON OFF ON

P10

1 hour 75min