Arcom SBC104, Technical Manual

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Appendix A. Connections
Power Connections
The board only re5v for normal operation. If however any additional PC/104 modules are
/-12v may also be required. There is no on-board +5v to +/-12v converter. These should be
connected to the plug-in terminal block of PL5 (1) as shown. The board typically requires 700mA for
normal operation.
An external battery back-up vVBB can be connected to the board also at PL5. The external
voltage used should be 3.7v. The average drain current on the battery back-up is 20uA.
Note: If an external voltage source is used LK3 must be removed to isolate the on-board battery.
Hard Disk Drive and Parallel Port Connections
HDD and LPT can be connected to the SBC104 using standard 40-way and 26-way ribbon cable
assemblies respectively. The ribbon cable IDC connectors should be fitted as shown.
The SBC104 only supports hard drives of up to 2 GBytes in size. Larger capacity drives may be
connected but must be configured (in the BIOS setup) as a drive of less than 2 GBytes.
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2192-08704-000-000 J562 SBC104
+5V +12V -12V GND(0V)
GND(0V)
+VBB
Floppy Disk
Drive Cable
Hard Disk Drive Cable
Parallel Port
Red Stripe