I am now promoting a new board that comes with many features that will allow you to fast and powerfull setups with reduced wiring.
Check out the board at:
http://www.cnc4pc.com/Multifunction_CNC_Board.htm
The features of this board are:
• Fully optoisolated
• Built-in Safety Charge Pump.
• Built-in Variable Speed Control.
• Built-in 10 amp AC Solid State Relay.
• Built-in 8 amp Mechanical Relay with NO and NC positions.
• All pins can be used in a concurrent manner.
• Buffered outputs.
• Status LEDs on all inputs and output connections.
• Has an extra DB25 female connection for output.
• Output pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 16, 17.
• Input pins 10, 11, 12, 13, 15.
• Input and output pins with close by ground connections.
• Easy installation of an On/Off switch. You can control the card externally.
• All TTL 5VDC signals.
• Works directly with popular CNC hardware and software.
• Screw-On connections for all terminals.
Arturo Duncan
http://cnc4pc.com