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6-24V Intelligent Automotive ATX Power Supply
Before you start...
Please take a moment and read this manual before you install the M2-ATX in your
vehicle. Often times, rushing into installing the unit can result in serious damage
to your M2-ATX board, computer and probably your car's electrical system.
The M2-ATX 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 power sequencer / vehicle ATX power supply.
The M2-ATX 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 P4 systems.
1.1 M2-ATX Logic Diagram
+
Battery
GND
Ignition
Amplifier
Enable
M2-ATX
Installation Guide
P/N M2-ATX-01
Reverse and
+
forward protection
-
SW
J62
Version 1.0
Switch Logic
6-30V DC-DC
ATX PSU
8bit MCU
M1-
PC
ATX
power
MotherBoard
ON/OFF switch
J86
Optional On/OFF switch
J98
LED
J54
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Summary of Contents for mini-box M2-ATX-01
- Page 1 6-24V Intelligent Automotive ATX Power Supply Installation Guide Version 1.0 P/N M2-ATX-01 Before you start… Please take a moment and read this manual before you install the M2-ATX in your vehicle. Often times, rushing into installing the unit can result in serious damage to your M2-ATX board, computer and probably your car’s electrical system.
- Page 2 1.2 M2-ATX Connection diagram M2-ATX, top view Power Input Connectors Battery + (un-switched battery, positive) Ignition (switched battery, positive. Can test by connecting it to Battery +) Battery - (negative) Controls and Settings Controls amplifier via remote ON/OFF. Left pin is RMT, Right pin is GND To motherboard ON/OFF switch User jumper settings (A,B,C,D) To external ON/OFF switch (optional, J8 is in parallel with J9)
- Page 3 The M2-ATX is addressing these issues by cutting off the 5VSB rail after a pre-defined amount of time (see jumper chart, HARDOFF). When 5VSB is always active (HARDOFF=Never), M2-ATX constantly monitors the battery levels. When battery level drops below 11V for more than one minute, M2-ATX will shut down and re-activate only when the input voltage is >...
- Page 4 Check input cables. Measure voltage on the un-switched 12V. You should get about 12V. Measure the un-switched pin (red) while turning the car ON/OFF. You should see 12V (car on) or 0V (car off). b) Motherboard is not turning ON (cont). Check your output cables.
- Page 5 When operating at 24V or extreme temperatures, de-rate by 25%, ventilation will be required. 12V Rail Output Current Input (V) 12V rail current Input (V) 12V rail current 8.5A 14-18V 20-26V For low input voltage (6-10V) ventilation might be required for peak load M2-ATX User Guide Page 5...
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