MRD Rail Technologies
(+61) 7 3821 5151
MRD Products

Products by MRD

Automatic Relay Tester​

Know the condition of your relays with RelayDoc

RelayDoc makes testing relays easy. Simply plug in a relay and select test. No training required


Fast and Reliable Testing

Automated relay testing


No Computer Necessary

Fully stand-alone operation


Web App for Remote Access

Easy remote data viewing


Auto Relay Type Detection

Using code-pins for detection


Results on Screen

Simple pass / fail format

RelayDoc 100% is designed and manufactured in​ Australia

Test all of the important relay parameters with RelayDoc

Test against the manufacturer’s specification. Test reports are displayed on the touch screen and stored onboard for viewing and retrieval.

They are also synchronised to a cloud database providing analysis and reporting tools.

  • Coil resistance

  • Coil power

  • Operate & Release voltage & current

  • Contact resistance

  • Contact switch time

  • Contact configuration check

  • Code-pin match

3D Viewer

Click & Drag for 360 Degree View (Double-click for full screen mode

RelayDoc Frequently Asked Questions

  • Coil voltage: 0 – 110V DC
  • Coil current: 0 – 500mA
  • Coil type: Single, Dual (Twin), Latch and Current
  • Up to 32 contacts testable

Yes. There are mounting holes on rear of case.

280mm × 180mm × 120mm (W × H × D) 
Weight 2.7kg

• Capacitive touchscreen
• 5″ colour TFT display

Our products are trusted by

RelayDoc is a product of MRD Rail Technologies

Who are we?

MRD Rail Technologies have been a specialist in the design and manufacture of condition monitoring products since 1991. We have supplied rail networks around the globe with cutting-edge solutions which were designed and manufactured in-house. This allows us a lot of freedom to be creative and innovate, while carefully controlling important factors like cost, quality and lead times.

With an invested focus in the field of asset condition monitoring, our products include rail signalling test and measurement equipment, automatic relay testers, passenger information systems, AWS equipment and more.

The MRD Team have passion and expertise for developing innovative hardware and software solutions that change the way the railway industry approaches network reliability and maintenance. Our products make it simpler for remote operators to monitor the condition of crucial track machinery and obtain the information they need to make timely maintenance decisions based on both exact,and predicted, condition.

Industries that benefit from the use of MRD products

Latest RelayDoc software version: V1.26

MRD RelayDoc

RelayDoc requires yearly calibration, which includes the latest software and relay test profile updates. To book in a calibration, please get in touch with the team.


Phone (+61) 7 3821 5151


235 South Street, Cleveland, Queensland 4160 Australia
MON-FRI 09:00 - 17:00,