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VMB4AN - 4-channel analog input module


  • 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

  • 4 sensor inputs
  • power supply output for the sensors
  • 8 alarm channels
  • configuration with Velbuslink software (free) and a USB/RS-232 interface module
  • electronically addressable (up to 250 addresses)
  • firmware can be upgraded through the Velbus® system
  • Information on the usage and configuration of this module is available in the configuration software Velbuslink.
  • inputs: 4 analog inputs for sensors
  • each sensor input configurable as:
    • voltage input: 0 … 10 V
    • current loop input: 0 … 20 mA or 4 … 20 mA
    • resistance input: 0...2 kOhm
    • frequency input: 5 … 500 Hz
  • power supply output for sensors: 24 VDC / 150 mA
  • analog outputs (external server needed): 0 to 10 V / 10 mA per channel
  • power supply: 15±3VDC
  • max. power consumption: 550 mA
  • dimensions: 90 x 71 x 58 mm / 3.5 x 2.8 x 2.3"
  • width: 4 DIN modules
  • standby current consumption: 60 mA


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 do I connect sensors to the VMB4AN?
A. Up to 4 sensors can be connected to the VMB4AN using the "analog in" connections. For resistance, 0-10V and frequency sensors connect one wire to the COM input and the other to the 1, 2, 3 or 4 input. For current sensors (0-20mA), connect the + of the sensor to the + (power supply) of the VMB4AN, and the - of the sensor to input 1, 2, 3 or 4.
The type of each sensor (resistance, 0-10V, 0-20mA or frequency) is configured using Velbuslink.
If the sensor needs a 24V DC power supply, this can also be supplied by the VMB4AN using the leftmost 4 connections.
If the sensor has 3 wires, 2 of them (typically those that have the same color) have to be connected together.