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FP48I/O Parallel Port Relay Board with Stepper Motor Drive

4 Optically Isolated Inputs

4 Relay Outputs

4 Darlington Outputs for Stepper Drive

Come with Sample Source Code

Assembled and Tested


  • Double side PCB trace can carry 10A current between Relays and Terminals
  • 4 x Relay outputs, contacts rated 250VAC / 30DC @ 10A
  • 4 x Darlington open-collector outputs, sinking current 500mA. Can drive stepping motor
  • 4 x Optically isolated inputs, input voltage 5 to 12VDC
  • Indication LED’s for output and input status
  • Screw Terminal Blocks for Relay outputs, input channels and 12V Power Input
  • DB25 female connector for connect to the computer parallel printer port.
  • Power input 12VDC / 350mA.
  • Dimensions: 3.75 x 3.75inches (95 x 95mm)
  • 4 x Φ3mm mounting holes


  • Windows based program to test the relay board for parallel port assembled board.
  • VB 2005 test program sample source code
  • LabVIEW program to test and timing control the relay board. (Option $10. and send by email)

Shipping Included:




FP48I/O Board


Parallel Port Relay Board

Test Program


Board test program FP48Ctrl v1.00 (Download Here)

Program Source Code


Board test program FP48Ctrl v1.00 sample source code. (Send by email)

Reference and Datasheets Download:

Shipping and Handling:

Please read the following carefully regard to Shipping and Handling conditions

For Regular Letter Mail method, the package will arrive to you within 7 business days in Canada, 10 to 30 business days to Italy, 7 to 20 business days to US and the rest of the world, In rare cases, it may take longer due to delay in custom clearance or during the holidays.There is no tracking number for this method. You have to choose Expited or Xpresspost (both only for North America) to have a tracking provided. Due to the nature of Canada Post delivery, packages to US could be slower than they specified recently due to custom or other reasons (from Canada Post). We can only offer you a full refund 45 business days after your payment. We thank you for your understanding and cooperation.

Shipping/Handing Cost:

Shipping and Handling

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Worldwide & Italy

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$27.99 In stock