Today Motorola added a new repeater to the MOTOTRBO family - the SLR5500.
Front view (click to enlarge)

Front view (with rack mounting ears)

This compact rack mount repeater offers several interesting features:

  • Physical Dimensions: 44 x 483 x 370 mm or 1RU
  • Weight: 8,6kg.
  • MOTOTRBO and Analogue (FM) Conventional Operation
  • Supports the connection to MPT1327 site contollers.
  • Continuous Duty Cycle Operation anywhere between -30°C and +60°C
  • Meets or exceeds ETSI TS 086; ETSI TS 113; ETSI TS 102 361-1-2-3
  • Onboard AMBE +2™ Digital VOCODER
  • Synthesized Frequency Generation with 1.5ppm stability (5ppb with external reference)
  • Female N-type Antenna Connector (TX) and Female BNC Antenna Connector (RX)
  • Ethernet Port
  • Front mounted USB Port (Service)
  • D25 Female Accessory Connector with 12 configurable GPIO ports (Digital); 4 configurable GPI ports (Analogue 0-5V); 2 configurable GPO ports (Analogue 0-5V) and 12VDC power for third party controllers (1A max)
  • Switched Power Supply (85 – 264 VAC) (47 – 63 Hz)
  • Multi-Power Source configurable (AC, DC, or AC with Battery Revert)
  • Integrated 3A battery charger (12V)
  • Station Diagnostic Tests on power up.
"Under the hood" (click to enlarge)

The repeater uses the same CPS and tools as the other MOTOTRBO repeaters and radios. The Basic Service and Installation Manual is available on Motorola Online. There will be a new CPS (version 11.5) and firmware (R2.4A) coming out very soon by the way so "stay tuned".
Connectors on the back (click to enlarge)

What is the 2nd Ethernet connector used for?

This is reserved for future development.

What are the USB host; GPS and WLAN plugs used for?

These are reserved for future development.

What is the external reference connector for?

This is currently used for applications which require higher frequency stability. One can inject a 5 or 10MHz clock from an atomic clock or GPS receiver.

Are the fans any quieter?

I haven't done any comparative measurements but yes they are quieter than the DR3000.


  1. Hi, Sir,

    Pls, for me know exactly power supply AC of repeaters MotoTrbo XiR-DR3000, MTR3000, SLR5000 how much is Watt?

    Thanks, Quoc Mai

    1. These values are listed in the Basic Service Manual.

  2. This comment has been removed by the author.

  3. Hi Wayne. I wonder if you can help me. I am trying to find a pin out list/ diagram for the Aux connector. Dear Google has been very unhelpful. I have inherited a comms role in me local search and rescue team, because 20 years ago I worked in the dark arts radio engineering. I am looking to build a display that is powered from the Aux connector to say what channel/ mode has been selected. Do you have any info you can share? Regards

    1. I'll post something in the next few days...

  4. Hi Wayne, I have programmed this repeater in the analoge mode but would like to add another channel using same frequencies but different TPL code for seperate group.How do I do this?

    1. You can add multiple channels *but* the repeater cannot receive on more than one channel at a time. If you want to have multiple PLs on the repeater, you need to use a Tone Panel - see


Powered by Blogger.