Hydrogen Refueling Data Interface (RDI Tx and RDI ECU)

by HOERBIGER Elektronik GmbH

  • Reliable refueling process due to optically exchanged information
  • Our hydrogen refueling data interface enables fast refueling within three minutes
  • E1 (ECE R10) Certification of German Federal Motor Transport Authority
  • EN 60079-0, -11, -18
  • SAE J2799 and Ex ib IIC T1 / Ex mb IIC T1
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Hydrogen Refueling Data Interface (RDI Tx and RDI ECU)

  • Our RDI system ensures reliable, fast and efficient refueling of hydrogen. It provides a hydrogen fueled surface vehicle with the capability to send data to a hydrogen filling station during refueling via an infrared communication link. It fulfills SAE J2799. Information like receptacle type, tank volume, measured pressure and temperature etc. is transmitted unidirectional from the vehicle to the station.
  • The main purpose of the RDI system is to facilitate for the filling station to fill the hydrogen storage tank of the vehicle in about three minutes to the nominal pressure of the tank in a safe way and without the temperature of the gas in the storage tank getting too hot.
  • The vehicle side RDI-system consists of two parts: the infrared transmitter with cable (Tx) and the infrared electronic control unit (ECU). The ECU is the gateway to the CAN communication network and provides the transformation from CAN data to electrical IrDA format. Furthermore, the ECU has a safety barrier to limit the electrical power in the Tx (Ex proof).
  • By supporting all relevant standards as well as the robust design, the HOERBIGER RDI is already used in cars, trucks or trains.
  • With the help of the communication via infrared to the filling station, the station knows at any time about the status of the tank system in the vehicle and can control the refueling process accordingly. This leads to efficient refueling (State of Charge over 95%) and a shorter refueling time (5kg under 3 minutes).
  • HOERBIGER offers different versions and responds to the wishes of the customers.



  • Programmed Control Unit
  • Intrinsic Safety Barrier (acc. to ATEX / IECEx, not certified)
  • CAN Interface
  • IP 5K2


  • IR transmitter module
  • electrical IrDA pulses according to SAE J2799
  • IP 6K6K and IP 6K9K

Find detailed technical specifications here

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  • HOERBIGER offers different versions and responds to the wishes of the customers.
  • Use the contact form on Hyfindr to get directly to the right person!

Hoerbiger hydrogen RDI

Ingress Protection Rating

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Electronic Control Interface


Compliant with

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Max Ambient Temperature (in °C)

Min Ambient Temperature (in °C)

Manufacturing Readiness (MRL)

Technology Readiness (TRL)


Technical Specifications

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      HOERBIGER Elektronik GmbH

      HOERBIGER is active throughout the world in the oil, gas, and process industries, in the automotive industry, and in safety solutions. In 2020, its 5,849 employees achieved sales of 1.130 billion euros in 123 locations and 40 countries. Our products and services are used in reciprocating compressors, gas flow control units, vehicle transmissions, gas-powered engines, automobile hydraulics, and comprehensive explosion protection solutions. It is our shared ambition to deliver excellence for our customers. As a result, we create an environment which allows our employees to develop their full potential and demonstrate initiative: people and success go hand in hand at HOERBIGER. We are offering innovation hydrogen refueling solutions like the refueling data interface (RDI) for fast and reliable refilling of hydrogen vehicles and trains.

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