Safety Meets Scale: DOLD Joins the EVerest Ecosystem with Native RN 5893 Driver
How open-source drivers are closing the gap between industrial safety hardware and modern EV charging software.
The Safety Imperative in DC Charging
As the global EV infrastructure races toward terawatt-hour scales, one variable remains non-negotiable: Safety.
In the world of DC fast charging, where systems routinely handle up to 1000V, the Insulation Monitoring Device (IMD) is the silent guardian. It is the critical line of defense against fire and electrical shock, ensuring that unearthed DC systems (IT systems) remain isolated and secure. But for too long, integrating these mission-critical components has been a complex, manual process for hardware manufacturers.
Today, we are changing that.
The Announcement: Pionix x DOLD
Pionix is proud to announce a strategic partnership with DOLD, a global leader in relay modules and functional safety. Together, we are bridging the divide between rugged industrial hardware and the open-source software that powers the future of mobility.
As part of this collaboration, Dold has contributed a native EVerest driver for their high-performance RN 5893 Insulation Monitor. This contribution means that one of the most trusted safety devices in the industry is now "plug-and-play" ready for any charger running the EVerest stack.
Technical Deep Dive: The RN 5893
The Dold RN 5893 is purpose-built for the rigors of DC charging stations. It complies strictly with IEC/EN 61851-23, offering:
- High Voltage Support: Monitoring up to 1000V DC (with coupling device).
- Speed: A reaction time of <1s, ensuring instant fault detection.
- Connectivity: A robust Modbus RTU interface.
The Software Advantage
Previously, integrating an IMD like this required writing custom firmware to interpret Modbus registers and map them to the charging logic. The new EVerest driver handles this heavy lifting. It abstracts the RN 5893’s Modbus interface, allowing the EVerest Energy Manager and System Control modules to:
- Read insulation resistance values in real-time.
- Monitor safety status instantly.
- Handle alarms natively within the main charging logic.
Why Open-Source Drivers are a Game-Changer for OEMs
For hardware manufacturers (OEMs), the "Time to Market" pressure is intense. Traditionally, every new component—whether it’s a power meter, a card reader, or an IMD—required a dedicated R&D sprint to write, test, and validate custom drivers.
This is the "Hidden Tax" of proprietary firmware.
The open-source model eliminates this tax. With a native driver in the EVerest repository, OEMs can:
- Standardize Integration: Instead of reading 100-page Modbus manuals, developers simply enable the module in the EVerest configuration file.
- Focus on Differentiation: Engineers stop spending weeks on plumbing (connectivity) and start focusing on value (user experience, design, and reliability).
- Ensure Reliability: The driver is community-vetted and tested against the actual hardware, reducing the risk of "edge case" bugs in the field.
A Shared Mission: Safety by Design
This partnership is about more than just code; it’s about aligning the precision of German engineering with the scalability of open-source software.
"At Dold, safety is not just a feature—it is the foundation of our engineering DNA. By contributing the RN 5893 driver to EVerest, we are ensuring that this foundation is accessible to the entire EV charging industry. We believe that the future of charging must be built on systems that are not only open and interoperable but fundamentally safe by design."— Ghostwritten Statement, Dold & Söhne / Pionix Partnership
About Dold
E. Dold & Söhne GmbH & Co. KG is an internationally oriented, medium-sized family-owned company that develops, manufactures, and distributes high-quality components and solutions for safe automation in mechanical and plant engineering worldwide. Dold has continuously evolved: From a pioneer in relay technology to one of Europe's leading industry players in functional safety, electrical safety, and smart drive technology.
Wherever people, machines, and systems need to be protected from damage and productivity increased, Dold products are successfully deployed across the globe. Specifically in the field of electrical safety, Dold offers a comprehensive portfolio of residual current and insulation monitoring devices, insulation fault location systems, as well as measuring and monitoring relays for both unearthed (IT systems) and earthed power supplies (TT and TN systems)
Get Started
The RN 5893 driver is available now in the EVerest repository. Whether you are a CPO looking for safety compliant solutions or an OEM designing your next-generation DC charger, the tools you need are ready.