Port Expander


Designed for exclusive use with the M-8080D, the M-804EX Extension Module 4 Ports is a port expander featuring a star connection of the controllers.

  • 1 digital port In (from M-8080D)
  • 1 digital port Out for audio plus control
  • 3 digital port Out for control only
  • 24V DC power supply

Discover our products in 3-D view – and project them via AR into any room and get 3-D all-round view in real time

How can I turn, enlarge, move the object?
Rotate /Turn: Hold left click and drag at the same time or on a touch screen please drag with one finger.

Zoom: To zoom in or out, please scroll with the mouse wheel or on a touch screen please work with pinch-to-zoom i.e. pull the object apart with 2 fingers to zoom in.

Move the entire object: Hold right-click and drag or on a touchscreen please drag with 2 fingers.

Project into my own space:

Click AR (Augmented Reality) at the bottom right of the window. Now you can scan the QR code or simply open the link on your mobile device.

  • Specifications
  • Equipment
  • Tender text
  • Downloads
Specifications for product:
Operating temperature

0°C to + 40°C (32°F to 104°F)


Aluminium, Steel, black


196.2 x 44.2 x 133 mm (W x H x D)


0.92 kg

Power source

24 V DC Powered by M-8080D or external


RD IN (Green)
RD exp audio (Green)
RD exp control (Green) x3
Power (Red)


RD IN: Transmits and receives AES3 digital audio plus control data
Connect to M-8080D, RJ45 connector


RD EXP: Port 1: transmits and receives AES3 digital audio and control data
Connect to M-822IO, M-800RC, M-800RCT or M-800RM, RJ45 connector

Port 2 - 4: transmits and receives control data

connect to M-800RC or M-800RCT, RJ45 connector

Accessory (included)

Removable terminal plug (2p)

CAT5e cable (2m)

Plastic foot pad x4

Tender text