Bill of materials for DIO48 24V optoisolated terminal board
ITEM	QTY	PN	DESC

1	1		Board Blank
2	1		50 Pin Male Header Connecter
3	29		.200 Spacing Dual Screw Terminal
4	24		2.2k 1/4 W 5% CF Resistor
5	24		3.3k 1/4 W 5% CF Resistor
6	24		680 Ohm "          "
7	12		TLP620-4 Toshiba Quad Optoisolator
8	3		Allegro UDN2803A Octal Darlington Sink Driver
9	3		1 uF Monolithic Ceramic Capacitor 50 V


Sourcing  These are are the sources I used ca 3/28/01 You may
be able to find better pricing.

1	Fabricated from artwork I used Alberta Printed Circuits
	Cost: $26US in qty 10

2	Jameco	53559	Cost .32 in qty 20
3	Jameco	152346	Cost .29 in qty 100
4	Jameco	30314	Cost .0089 in qty 100
5	Jameco	30672	""	""	""
6	Jameco	31499	""	""	""
7	Digi Key 	Cost $1.75 in qty 20
8	Arrow		Cost  .49 in qty 30	
9	Jameco	81509	Cost .35 in qty 10

Total cost per board was about $59.00  

Total cost for 48 points of Industrial I/O for your Linux Box is 
about $160.00 allowing $100.00 for the DIO48 and cable

Cost/point = $3.33