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VMBPIRM - Mini motion and twilight sensor for recessed or surface mounting

The VMBPIRM is much more than a miniature motion detector for indoor use. You can simultaneously use motion, twilight and even absence detection. The built-in astronomical clock allows the VMBPIRM to operate time-dependently. The module also detects motion for a passage signal and light dependent motion for lighting control. Thanks to its housing (included), the VMBPIRM is also suited for surface mounting.


  • 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

  • motion detector for indoor use (wall or ceiling)
  • housing included for surface mounting
  • two output channels for motion detection with adjustable timeout
  • two output channels for light dependent motion detection with adjustable light sensitivity and timeout
  • output channel for absence detection with adjustable timeout
  • two output channels for twilight detection (dark and light) with adjustable light sensitivity, reaction time and timeout
  • supports extensive day, week and year programs with built-in astronomical clock for locking/unlocking the output channels
  • configuration through Velbus PC interface (VMB1USB, VMBRSUSB) and the free VELBUSLINK software
  • electronically addressable (up to 250 addresses)
  • detection angle: 100°
  • detection distance: max. diameter 6 m (at 2.5 m height)
  • light sensitivity: 1 - 100 lux
  • required voltage supply: 15±3VDC
  • current consumption: 10 mA
  • dimensions:
    • part to be built in: 55 x 15 x 15 mm (fits through an Ø 18 mm hole)
    • PIR sensor: Ø 22 mm (mounting depth 20 mm)
    • housing for surface mounting: Ø 75 mm / height 35 mm
    • mounting hole: without mounting accessory Ø 18mm; with mounting accessory Ø 20-22mm


PDF-File User manual
Programmation and configuration of the VMBPIRM
PDF-File Mounting instructions


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
Q. How to make a Velbus motion sensor switch the light?
A. A Velbus motion sensor (VMBPIRO, VMBPIRC, VMBPIRM, VMBGP4PIR) has to switch the light on during 3 minutes when motion is detected. How do I program this in Velbuslink? Read more ... (PDF)
Q. How can I make a Velbus motion sensor switch a relay at the second movement within 1 minute (to avoid false alarms)?
A. Read more... (PDF)
Q. How can I disable and enable push buttons and sensor channels at certain times?
A. A light needs to be switched by a PIR sensor from 8:00 until 22:00, and by a push button from 22:00 until 8:00. How do I program this in Velbuslink? Read more... (PDF)
Q. How can I make a motion detector set a light to a certain dim value during a certain time?
A. A Velbus motion sensor needs to turn a light on at a certain dim value (eg. 50%) during a certain time (eg. 1 minute).
This can be done as follows:
- in the configuration of the Velbus motion sensor module, set the timeout of the motion output to 1s
- create an action "Set to percentage" with the motion output channel as initiator and the dimmer channel as subject. Set the dim percentage parameter (in our example 50%). This action has also a "duration" parameter. Set this to the desired on time (in our example 1 minute)
Q. Advanced configuration of a PIR motion sensor, light and ventilation in the toilet
A. The following functionality needs to be programmed:
- a Velbus PIR motion detector switches the light on in the toilet
- 2 minutes after the light goes on, the ventilation has to start
- 3 minutes after the light goes out, the ventilation has to stop
- if the light is off before the 2 minutes have passed, the ventilation has to stay off
Read more... (PDF)
Q. PIR sensor different dimming values before and after sunset
A. My PIR sensor switches a dimmed light circuit. When movement is detected, the light should be switched on at 70% during the day, and at 30% during the night. Read more ... (PDF)