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8-channel relay card

Velleman K8056: 8 Channel Relay Board

Velleman K8056

Velleman K8056: 8 Channel Relay Card

Use this 8-channel relay card to interface relays and switch between applications in your projects.

The K8056 can run:

  • As a stand alone card using open collectors or switches
  • By remote with RS232
  • By remote using radio frequency signals with the Velleman K8058 remote control and RX433 module as a receiver

Relay contacts are all high-quality and operate at 5A/230VAC max with an LED confirmation on each. Write custom applications for the card in any programming language and platform. Download test software from the Velleman USA website.


  • Relay outputs are transient suppressed using VDRs
  • Eight drive inputs to use with open collectors or regular switches
  • RS232 input to drive the card with computer or terminal. High or low impendant selection.
  • Dimensions: 6.3 x 4.2 x 1.2"


  • Power output: unregulated 12Vdc / 200mA
  • Power supply: 12Vac / 500mA (including 12V output)

Diagnostic/Test Software:

  • Separate relay on/off test with moment or toggle function
  • Clear all/set all relays function
  • Address selection: up to 255 cards can be selected
  • Emergency stop for all cards
  • System requirements for test software:
    • Pentium class CPU
    • Windows 95 or higher
    • Mouse and free RS232 port

Additional Information

Difficulty Level 4


Info Sheets

Resistor colour code

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

RF projects features, specs & compatibility

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product