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MPI400 Flexa

Programmable Intercom device with contact closure inputs, relay outputs, Line and Mic / Speaker support.

The MPI400 FLEXA is a PoE powered device that supports the FLEXA ecosystem providing mono audio input (line level as well as balanced, phantom powered microphone input) and an audio output (line level out and speaker (1W into 8 Ohm) as well as symmetric/balanced output). It also supports 2 digital dry contact inputs and 2 relay. This features makes the MPI400 FLEXA device the ideal platform of all kinds of customised intercom and control applications. Where audio needs to be transported both ways and where control support is requested, for example to initiate a call with a call button or to switch a door opener or turn on a light. FLEXA is an ecosystem to develop simple applications that run on Barix Flexa devices. The advantage of FLEXA is that it doesn’t require to compile code and produce images to make a device solving a specific problem. The only thing required is to write a program that runs on the Flexa devices and that can be deployed on the same. FLEXA applications can be programmed by Barix as a service and are distributed over the cloud using the Barix FLEXA distribution mechanism.

CPU / Memory

  • Barix IPAM400 Processor Module
  • Quad-Core ARM CortexTM -A7
  • 256 MB DDR3 SDRAM
  • 16 MB SPI Flash

Operating System

  • Embedded Linux based on Yocto

Power interface

  • 24 VDC, +/- 20%, 12 Watt max.
    on detach. screw terminal block
  • IEEE 802.3af PoE

Network interface

  • 10/100Mbps auto-sensing
  • RJ-45 connector with integrated Link /Activity LED
  • IPv4/IPv6 capable
  • Protocols: TCP/IP, HTTP, UDP, RTP, SIP, DHCP, Multicast capable

USB Interface

  • 2x USB 2.0 type A interfaces
Discrete I/O

On detach. screw terminal block:

  • 1x Normally open relay 30V 0.5A
  • 1x Normally closed relay 30V 0.5A
  • 2x digital dry contact inputs

Audio input interfaces

On detach. screw terminal block:

  • Line level input +4dBu max, mono, unbalanced
  • Microphone input, balanced, 18V phantom powered
  • Microphone input, electret, unbalanced, 2.1V bias

Audio Output interfaces

On detach. screw terminal block:

  • Audio output (mono), suitable to drive a speaker or a balanced output (exclusive output).Speaker: 1W @8ohms
    Line out: symmetric/balanced,
    non-isolated, with DC offset, 10dBu (unbalanced: 4dBu)volume level software controlled
  • 3.5mm headphone output
IP Audio formats

  • FDX/HDX SIP client support
  • HTTP(S) and (S)RTP Streaming
  • Large variety of codecs can be supported (e.g. MP3, PCM, G.711, G.722, AAC+, OPUS)

User Interface

  • Web interface for configuration
  • 2 x Multicolor LED Status indicators
  • Reset & Factory Defaults Button


  • Aluminum case, 265 g
  • Dimensions 108 x 38 x 78.7mm
    (4.25 x 1.5 x 3.1 inch) rack and wall mountable using accessories


  • Two years

MPI400 Flexa (Made in Europe)

2022.9362P MPI400 Flexa PoE Package

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