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Denkovi Assembly Electronics ltd.
USB 16 Channel Relay Board - 24V
Relay Board Specification
  • 16 relays RAS-2415
  • Relay parameters: 24V / 15mA, 15A/24VDC (120VAC), 10A/250VAC Datasheet here
  • PCB parameters : FR4 / 1.5mm / two layers / metallized holes / HAL / white stamp / solder mask
  • Supply: 24V, 350mA
  • Input voltage: 3V-15V (1.5mA max)
  • May be controlled directly by microcontroller
  • Dimensions: 85mm / 300mm / 20mm
USB Board parameters
  • Microcontroller type PIC16F873A - datasheet
  • FT232R chip - datasheet
  • Supply - 5V directly from the PC.
  • Dimensions: 71mm / 51 mm / 12 mm
  • Communication parameters
    • " 01+// " - Relay 1 is switched ON
    • " 01-// " - Relay 1 is switched OFF
    • " 02+// " - Relay 2 is switched ON
    • " 02-// " - Relay 2 is switched OFF
    • ......
    • ......
    • " 16+// " - Relay 1 is switched ON
    • " 16-// " - Relay 1 is switched OFF
    • " on// " - All relays are switched ON
    • " off// " - All relays are switched OFF
  • The microcontroller is flashed so that what it receives the same is sent back - just like echo (" // " is delimiter)
  • Many relays may be set at a time. You may use the following:
    • Send sequentially
    " x " - as a char
    a - as HEX number. a[0;FF]. This number correspondends with relays from 1 to 8. The MSB is relay 1.
    b - as HEX number. b[0;FF]. This number correspondends with relays from 9 to 16. The MSB is relay 9.
    " / " - as a char. This is the first part of the delimiter
    " / " - as a char. This is the second part of the delimiter
    Example (a=1A(hex) and b= 05(hex) )
    " x " 1A 05 " / " " / "
    1A(hex)=00011010(bin)
    05(hex)=00000101(bin)
    Relays 1,2,3,6,8,9,10,11,12,13,15 - switched OFF
    Relays 4,5,7,14,16 - switched ON
  • Communication parameters
    • 8 Data, 1 Stop, No Parity
      Baud rate : 14400
  • Note that there must be time interval minimum 5 ms between each two commands, because there may be errors in the communication !
The kit includes
  • Sixteen Channel Relay Board - 24V
  • USB Controller Board
  • Flat Ribbon Cable
  • Free software, available from this web-page
Price: 108 USD
Last updated 29.07.2009, VAT is not included for all prices