(Kit or Assembled)

serial port relay board

Serial Port I/O Relay Board - Kit or Fully Assembled & Tested

You can program and control this relay board via a PC Serial Port. Simply connect a serial cable from your computer to the connector on relay board. There are 8 relays each capable of switching 250V/12A switched by using Dinkle connectors (250V rated).  There are also 4 optically isolated inputs that can be used for feed back. We provide Windows 9x/2000/ME/XP software download to control the unit.  The kit is a boon to the Science Fair project, laboratory experimenter and so on.  Uses serial port so it can be located over 100 yards from the PC. 

Need more inputs and outputs?  Join two CK1610's together with the CK1610 Upgrade Kit.

Follow this link to some free software for the CK1610 board (also known as K108) - developed by John Gray - free software.


  • L: 5-1/2" W: 4-1/2" H: 1-1/2"
  • Requires external 9-12 volt dc @ 500mA power supply
    (Need a Power Supply?)
  • Draws about 20mA in idle state
  • 8 Relay Outputs, relay ratings: 24VDC@15A, 120VAC@15A, 250VAC@10A (more info on how relays work)
  • 4 Optically Isolated Inputs
  • Programmed via any terminal program and simple text commands
  • Complete instructions included

See CK1610.pdf for complete details, including schematic and theory of operation.  Requires Adobe Acrobat Reader available at for FREE!

Windows software 9x/2000/ME/XP, Dos Software also included Download 

This unit can be used with ANY computer and operating system. It can be controlled via a terminal emulator program such as HyperTerminal. Or, click her for a free Terminal program

See  Radio Frequency data link kit  K173 AND K174 to connect your PC to the CK1610

Also See:

CK1601 - Parallel Port Relay Board

Note: Available as kit or fully assembled and tested module in enclosure.  If you order the kit you will receive parts to build the item pictured.  If you do not know how to solder you can check out our learn to solder kit.  Also offered as an assembled unit, order CK1610A. IN STOCK!

 Serial Port I/O Relay Board Kit - $74.95
CK1610A - Serial Port I/O Relay Board (Now Fully Assembled & Tested!) - $116.95
CK1610U (Upgrade) - $24.95
(see CK1610U details here)

Quantity and Educational discounts?


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