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. Ensure total system power consumption does not exceed the M2-ATX specifications.
c) Motherboard is not turning ON (cont).
Make sure that either J8 or J9 is properly connected to the ON/OFF switch of your M/B.
4.0 M2-ATX Characteristics
Minimum Input Operating. voltage
6V
Maximum input Operating voltage
24V (clamping will occur at 25-27V)
Deep-Discharge shutdown threshold 11.2V
Input current limit (fuse protected)
15A (15A mini-blade fuse)
Max Output Power
9
0 Watts
Operating temperature
-40 to +85* degrees Celsius
Storage temperature
-55 to +125 degrees Celsius
MTBF
192,000 hrs @ 50C, 96,000 hrs @65C
Efficiency (Input 9-16V)
>94%, all rails combined, 50% load.
PCB size
160x45mm
Input connectors
Faston 0.25” terminal
Output Connector
ATX Power 20 pin (Molex P/N 39-01-2200)
*Units starts failing at ~115 Celsius. Operating at temperatures above 85C / 185F will drastically reduce the MTBF. When operating at high
temperatures or fanless operation, must reduce PSU load by 25%.
75
78
81
84
87
90
93
96
99
6
8
10
12
14
16
18
Vin (V)
12
V
r
ai
l
E
ff
ic
ie
n
cy
(
%
)
Iout = 5A
Iout = 6A
Iout = 8A
Maximum Power Characteristics
Output Rail
Current (Max)
Current Peak
(<60 seconds)
Regulation
5V
8A
12A
1.5%
3.3V
8A
12A
1.5%
5VSB
1.5A
2A
1.5%
-12V
0.15A
0.2A
5-%
12V
8A* (see below) 9A
2%
Total power =
90
Watts
M2-ATX User Guide Page 4
