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Prepare COM Express components
Power supply
The CE915GM will work with an ATX‐compliant power supply or a power supply that is compliant
with PICMG
sure to consider the maximum power, AC input, frequency, input current, and DC out
specifications of the power supply.
Theoretically, the CE915GM requires at least 8 A on the + 1 2V power rail. Considering the power
consumption of the carrier board, though, it is best to allow a certain amount of leeway on the
two power rails. For this reason, the power supply should be rated above 200 Watts with at least
12 A output on the +12 V power rail.
A typical power supply for the CR100 Flex ATX carrier board may have these specifications:
Type: ATX
Max Power: 350 W
AC input: 100–120 V AC, 200–240 V AC
Frequency: 50 / 6 0 H z
Input current: 10 A @ 1 15 V , 6 A @ 2 30 V
DC output:
Notes:
• It is recommended that you use an ATX P4 power supply with a 24‐pin cable, which is
typically labeled "BTX." A 20‐pin cable can also be used, in which case you would plug the 20‐
pin cable in on the pin #1 end of the carrier board's ATX power supply connector and leave
the two pairs of pins on the other end exposed. No adapter is required.
• When multiple fans are used, additional amperage is required. For example, if a 4U chassis
with two fans has 2A surge current for each fan, 16A is required (12A + 2A + 2A).
CD-ROM/DVD-ROM drives
A USB CD‐ROM/DVD‐ROM or IDE CD‐ROM/DVD‐ROM drive is usually required for you to install
the operating system and other software.
Hard disk
Standard computer IDE and SATA hard disks (60GB, 80GB, 120GB, etc.) can be attached to the
carrier board. The CR100 carrier board contains one IDE header and two SATA headers.
Keyboard and mouse
The CR100 carrier board supports a standard USB keyboard and USB mouse, rather than a PS/2
keyboard or mouse.
6
COM.0 COM Express Specification Revision 1.0. When selecting a power supply, be
®
Voltage
+3.3V
Current
14A
+5V
+12V
-5V
30A
15A
0.5A
-12V
+5V Standby with 12V power supply
0.8A
3.0A
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