30 CMA24BT cpuModule
BDM-610000087 Rev A
Auxiliary Power (CN3)
The Auxiliary Power connector (
CN3
) can be used to supply power to devices that are attached to the
cpuModule. These devices include hard drive, front-end boards for data acquisition systems, and other
devices.
Power can also be conveyed to the module through the Auxiliary Power connector (
CN3
). The Intel E3800
Series cpuModule only re5 V
DC
and ground for operation. +12 V may optionally be connected to
CN3 if it is required by any other device in the system.
If using the Auxiliary Power connector to power the system, care must be taken to ensure good power
connections. The power and ground leads must be twisted together, or as close together as possible to reduce
lead inductance. A separate lead must be used for each of the power pins. All 5V pins and all ground pins
must be connected. Do not use wire smaller than 20 gauge, and take care to ensure the length of the wire
does not exceed 2 ft. The power supply solution must be verified by measuring voltage at the Auxiliary
Power Connector and verifying that it meets the input voltage specifications. The voltage at the connector
should be checked with an oscilloscope while the system is operational.
G
Note
Although it is possible to power the cpuModule through the Auxiliary Power connector,
the preferred method is to power it through the bus connector from a power supply in the
stack. The cpuModule can have large current transients during operation, which make
powering it through wires difficult. Powering through the bus eliminates such problems as
voltage drop and lead inductance.
WARNING
System configurations which are powered using CN3 should
only
be used power
the CPU. The connector is not intended to power configurations which consist of peripheral
cards.
WARNING
This 12-pin power connector is
not
compatible with previous generations of
RTD cpuModules.
WARNING
If you connect power incorrectly, the module will almost certainly be destroyed.
Please verify power connections to the module before applying power.
Table 7 Auxiliary Power Connector (CN3)
Pin
Signal
Function
1
GND
Ground
2
+5 V
+5 Volts DC
3
+5 V
+5 Volts DC
4
GND
Ground
5
GND
Ground
6
+12 V
1
+12 Volts DC
7
+12 V
1
+12 Volts DC
8
GND
Ground
9
GND
Ground
10
+5 V
+5 Volts DC
11
+5 V
+5 Volts DC
12
GND
Ground
Summary of Contents for cpuModules CMA24BT
Page 3: ...Accessing the Analog World www rtd com ISO9001 and AS9100 CMA24BT cpuModules...
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Page 66: ...56 CMA24BT cpuModule BDM 610000087 Rev A...
Page 87: ...BDM 610000087 Rev A Chapter 4 Using the cpuModule 77...
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Page 94: ...84 CMA24BT cpuModule BDM 610000087 Rev A Figure 11 CMA24BTQ1910 Heatsink Edge near PCIe 104...
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Page 111: ...BDM 610000087 Rev A Appendix C IDAN Dimensions and Pinout 101...
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