Chapter 15
Power Connector
Kontron User's Guide PC/104-520
30
A system using the PC/104-520 also can be supplied from the PC/104 bus connectors. If only those supply
voltages pins are used, the following limitations apply:
Power
Number of Pins on
ISA Part
Max. Current
VCC (+5V)
4
4A
+12V
2
2A
-12V
2
2A
GND
8
8A
Modules on the PC/104 bus consuming a higher supply current must provide power supply through an
additional connector.
Note:
The PC/104-520 is not a replacement for a backplane. Use all power pins on the power connector and on the
PC/104 connectors for power supply to the PC/104-520, and also use all additional power connectors on addi-
tional I/O cards if your system exceeds the above limitations. It is not acceptable to use only the power pins of
the PC/104 connector for power supply to the full PC/104 stack.
15.3
External Battery
You can connect an external battery to Pin 3 (BATT) of the power connector instead of Pin 9 of the KBD
connector. For more information refer to the Keyboard chapter of this manual.
Note:
Pin 3 (power connector) and Pin 9 (KBD connector) are connected to the same signal. The pins are not de-
coupled, therefore do not connect two batteries.
When CMOS memory (containing your system's configuration) is erased, the CPU is reset to the delivery de-
fault. Hint: the flash memory (including a copy of the CMOS memory) is not affected by this operation.
1
2
3
J22
Normal operation
1
2
3
J22
CMOS erase
