Gateway

Relynx Gateway

EULYNX - compatible Gateway that enables multivendor configurations for signalling.

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Relynx Gateway is a commercial implementation of the EULYNX standard. Relynx Gateway enables to upgrade railway interlocking to ERTMS/ETCS level 1 and 2 without renewing the whole interlocking.

Relynx is built with latest proven technologies. There is no historical legacy or technical debt. Relynx components undergo comprehensive, automated tests to validate the implementation against the EULYNX specification. The current Relynx implementation is programmed against EULYNX baseline 4.

Relynx is transparent. Users get full access to the source code. Hence, users can review, update and configure the system independently.

Relynx gives freedom for infrastructure managers. They can decide how to renew railway signalling systems to fill the ERTMS / ETCS (L1-L2) in the future.

Imagine a railroad system where

✓ Remote control systems are open and cross-compatible.

✓ Life cycle costs are up to the infrastructure owner.

✓ Everything is documented and conceptually native for digital railways.

✓ ERTMS/ETCS modernisation is possible with modular system.

Simple commissioning and configuration

Relynx uses standard formats YAML and TOML for simple configuration of new and existing systems. If there are changes in a track site, just change the configuration and restart the system.

↪ Easy to implement and robust

Automatic validation and simulation

Relynx is automatically tested against the EULYNX specification. Each module and component, for example RaSTA and SCI-CC, are tested separately and together. The final system can be simulated before deployment.

↪ Secure and reliable

Source code is available

You get access to the source code. The updated baseline releases of EULYNX are made available for keeping updated with specification changes.

↪ Transparent without a vendor lock

Comprehensive documentation

Everything is documented in a standard and comprehensive way. You can consult the documentation for a quick and pleasant development experience.

↪ Well documented

Encryption, data logging, national customisations and more

With Relynx it is possible to have the highest security and safety combined with flexibility of modern software. We have a number of auxiliary functions and implementations available for national implementations, such as SCI-RBC. It enables standard way to communicate from interlocking towards RBC (radio block center).

How to proceed?

1. Project plan. Assessment of national requirements and included specifications.

2. Test plan. Tests are defined early for a clear schedule and acceptance criteria.

3. I/O configuration and mapping. Listing and mapping of included field elements. Different I/O signals and commands are matched against their counterparts in the protocol.

4. Simulation of the final end result against adjacent systems to validate correct behaviour.

5. Device setup. Necessary devices are procured and prepared for installation. You only need to start the devices in the field and check the provided tests to make sure that everything works.

6. FAT/SIT/SAT tests. The system is validated against the project plan.

7. Commissioning to operational use.

Relynx Gateway reference delivery

Link to Finnish Transport Infrastructure Agency story (2022)

1. POKA project for FTIA, contracted by GRK Infra Oyj.

2. Objective to enable EULYNX SCI-CC protocol based communication between TMS and 55 relay interlocking.

3. Project started with I/O configuration and mapping against counterparts in the protocol.

4. Total software delivery ~20k€ per interlocking (Software architecture, software development and documentation).

5. Device setup and delivery for contractor. Instruction how to install and configure by field engineers.

6. FAT/SIT/SAT tests executed in planned phases.

7. Maintenance and development service on request after comissioning.