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Please check the discount in certain categories, such as "USB Host Relay", "Relay boards", "LPT Relays", "RS485 Relays", "RS232 Relays", "UART Relays " ,"RF433 MHz Relays ", "Programmers"
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USB 4 Relay Board - RS232 Serial controlled, PCB

A general purpose USB Relay board (controller) for connection to a PC's USB port using VCP (Virtual COM port). Control devices using your PC. USB Relay Board allows a PC to control devices using simple RS232 commands. Relay is fully powered from the USB bus.
  • Code: SS_USB4REL_PCB
  • Manufacturer: KMtronic
  • In stock: 569

Price: €24.00

• Fully assembled and tested.
Fully powered from USB
• For 12V/24V DC 15A or 120V/220V AC at 10A max.

Can be used with  LabVIEW, ProfiLab, DAQFactory, TestPoint, DASYLab, VEE


  Complete including:
- One USB Four relay board

  Dimensions (PCB board):
76 mm / 59 mm

  Typical Applications:
      - Home automation
      - Industrial automation

Drivers -

  Drivers are available to work with the following operating systems:
Windows Server 2008 R2, Windows 7, Windows 7 x64, Windows Server 2008,
Windows Server 2008 x64, Windows Vista, Windows Vista x64, Windows Server 2003,
Windows Server 2003 x64, Windows XP, Windows XP x64, Windows 2000, Windows ME,
Windows 98, Linux, Mac OS X, Mac OS 9, Mac OS 8, Windows CE.NET (Version 4.2 and greater)

  Communication Parameters:
8 Data, 1 Stop, No Parity
Baud rate : 9600

FIRST chanel commands:
OFF command : FF 01 00 (HEX) or 255 1 0 (DEC)
ON command : FF 01 01 (HEX) or 255 1 1 (DEC)

SECOND chanel commands:
OFF command : FF 02 00 (HEX) or 255 2 0 (DEC)
ON command : FF 02 01 (HEX) or 255 2 1 (DEC)

THIRD chanel commands:
OFF command : FF 03 00 (HEX) or 255 3 0 (DEC)
ON command : FF 03 01 (HEX) or 255 3 1 (DEC)

FOURTH chanel commands:
OFF command : FF 04 00 (HEX) or 255 4 0 (DEC)
ON command : FF 04 01 (HEX) or 255 4 1 (DEC)

How to control USB relays - Windows Shortcut example, Windows Command Line example, Macintosh example, Abacom ProfiLAB example, Sample Visual Basic code, Sample C# code, Sample PHP files and more


Additonal information

  Payment accepted:
Credit Card payments, PayPal

Bank transfer (ONLY available for European Countries, 2.00 EUR fee)

We ship WORLDWIDE through TNT.

  Import duties, taxes and charges are not included in the item price or shipping charges. These charges
are the buyer's responsibility. Please check with your country's customs office to determine what these additional
costs before you purchase.

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