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VMB4PB - 4-channel push button interface

Push button interface for connecting up to 4 push buttons (with optional feedback LEDs) to the Velbus home automation system.


  • Only a qualified professional may carry out the installation in conformity with in force legislation and standards.

  • protocol manuals for developers

    available for download at https://github.com/velbus

  • connect up to 4 push buttons
  • connect up to 4 notification or backlight LEDs (optional) with operating voltage up to 24 V (AC or DC)
  • adjustable light intensity for the connected LEDs
  • suitable for common anode and common cathode LEDs
  • adjustable button response time (0, 1, 2 or 3 seconds)
  • detection of short or long button press
  • configurable multi-channel operation on push button, the next channel is selected at each press (up to 8 channels)
  • configurable dual channel push button, a different channel is selected depending on the length of the push (short or long push)
  • extensive day, week and year programs plus a built-in astronomical clock (sunrise and sunset timing) are included to operate push buttons automatically
  • configurable using a Velbus configuration module and the free VelbusLink program
  • power supply: 15±3 VDC
  • dimensions: 36 x 38 x 16 mm
  • max. current consumption: 50 mA
  • current consumption with LEDs off or not connected: 25 mA
  • outputs:
    • type: open collector
    • max. operating voltage: 15 VDC
    • built-in series resistor: 1.5 kOhm
    • max. output current: 10 mA @ 15V
    • usage: a.o. for feedback or notification LEDS (common anode or common cathode) with operating voltage up to 24V (AC or DC)
  • protection rating: IP10
  • max. input voltage: 3 V (designed for potential free contacts)
  • do not extend the input (push-button) wires


PDF-File Short user manual


EXE-File VelbusLink 10.6.5 (EN/NL/FR) - Latest version (10/21/2021)
Free Windows program to configure and program a Velbus installation (latest version - 10/21/2021)
PDF-File Velbus Installation Guide, Part 1: Hardware and Cabling
Everything you need to know about the Velbus hardware
PDF-File Velbus Installation Guide, Part 2: Configuration
How to configure Velbus modules using the free software VelbusLink
PDF-File Velbus Troubleshooting Guide
Step-by-step guide for solving Velbus problems.
EXE-File VelbusLink 10.5.1 (EN/NL/FR) - Previous version
Previous version of VelbusLink
XLSX-File Velbus consumption calculator
Spreadsheet to calculate the number of power supplies you need in a Velbus installation.

Info Sheets

PDF-File Infosheet
HTML-File Velbus actions by module (click on an action to see a description)
List of actions per module