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FR88I/O RS232 Serial Port Control Relay Board

4 Optically Isolated Inputs

4 Analog/Digital Inputs

4 Relay Outputs

4 Darlington Outputs

FLASH-Based Microcontroller PIC16F886

Pre-programmed Bootloader

With 14K Bytes Flash Program Memory,

368 bytes RAM, 256 bytes EEPROM


Easy-to-Program with Visual BASIC, C or LabVIEW programs

Come with Sample Code and Firmware

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 outputs, sinking current 500mA. Can drive stepping motor
  • 4 x Optically isolated inputs, input range voltage 5 to 12VDC
  • 4 x Digital/Analog input, input range voltage 0 to 5 VDC.
  • PIC16F886 pre-programmed with bootloader, you can download your PIC program don't need a programmer
  • 14K Bytes Flash Program Memory, 368 bytes RAM, 256 bytes EEPROM
  • Oscillator speed 8MHz default, up to 20MHz
  • Accept both 28-pin DIP PIC16F and PIC18F microcontrollers
  • In circuit programming and debugging ports for PICStart and PICKit 2 connection
  • RS232 (DB9 female), I2C and SPI communication ports
  • Works with computer RS232 serial port or USB to serial adapter
  • Need a DB9 straight through M/F (Male/Female) serial cable link to the computer RS232 serial port
  • Indication LED’s for output and input status
  • Screw Terminal Blocks for Relay outputs, input channels and 12V Power Input
  • Power input 12VDC / 500mA
  • Dimensions: 4.72 x 3.75 x 0.78 inches (120 x 95 x 20mm)
  • 4 x d3mm mounting holes


Shipping Included:




FR88I/O Board


Serial Port Relay Board with A Programmed PIC16F886



Board test program, firmware and source code. (Send by email)



Relay board and test program manual. (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

Each Additional Item






Canada Post Lettermail




Canada Post Xpresspost



United States

Canada Post Light Packet USA



United States

Canada Post Expedited Parcel - USA



Worldwide & Italy

Canada Post International Letter-post

$48.99 In stock