Functional Overview

The M28 is an RDM Splitter/Booster dedicated to boosting DMX512 digital lighting control signals. Specially designed for connection of DMX receiving devices (moving heads, color changers, dimmers etc.) in a daisy-chain configuration, it is ideal for applications where the DMX512 signal is at risk of being weakened over long distance transmission. The M28 RDM Splitter efficiently repeats and magnifies the DMX signal, making the control transmission more accurate and reliable.


  • RDM and DMX signal superposition and separation manager
  • 2x DMX input and 8x DMX output
  • All inputs and outputs are isolated. Protects DMX console and devices from output errors in any channel
  • 3 output modes:
    • HTP mode: DMX data from A port and B port, higher DMX data is priority input
    • LTP mode: DMX data from A port and B port, last DMX data is priority input
    • Backup mode: When no input form A port, B port will input DMX signal
  • 3 modes without output signal:
    • Zero
    • Hold data
    • No DMX out

Technical & Specification


  • CA-M28

Control and Program

  • Display: LCD display

Electrical and Connectors

  • Power supply with electronic auto-ranging
  • Input voltage range: AC 100V-240V, 50/60Hz
  • Power consumption: 7W
  • Data in/out: 3-pin and 5-pin XLR socket

Fixture Specification

  • Height: 145 mm (5.7")
  • Width: 44 mm (1.7")
  • Depth: 483 mm (19.0")
  • Weight: 2.1 kg (4.6 lbs)

Work Environment

  • Maximum ambient temperature: 40°C
  • Maximum surface temperature: 65°C
  • Minimum operating temperature: 0°C


  • CE Compliant


  • Suitable for standard 19” cabinet (1U)
  • Safety Rope Hole

Included Items

  • Power Cable
  • Digital User Manual

Optional Accessories (with item code)

  • Signal Line:3-pin or 5-pin signal line



  Version Read Download Date
RDM SPLITTER M28 Catalogue
en updated: 2019-04-16
  re  dw  2019-04-16
User Manual
RDM SPLITTER M28 User Manual C Version
fr version C, updated: 2018-10-22
re  dw  2018-10-22
RDM SPLITTER M28 Hanging Dimension
updated: 2019-04-16
    dw  2019-04-16
Firmware updates
version V13, updated: 2019-04-09
V13    dw  2019-04-09
Compliances & Declarations
RDM SPLITTER (CA-M28) Declaration of Conformity
en version , updated: 2021-08-31
  re  dw  2021-08-31