The RN series from Endress+Hauser is a powerful and relevant solution for analogue signal processing and conditioning. As industries continue to modernise and prioritise safety, efficiency and seamless integration, it offers a robust foundation for upgrading legacy systems and enhancing new installations. With its compact design, smart functionality and compatibility across platforms, this portfolio of interface modules is engineered to meet the evolving needs of industrial automation. Whether you’re operating in hazardous environments, managing complex control systems or seeking to streamline your measurement infrastructure, the RN series delivers the performance and simplicity required to succeed.
Why analogue still matters
Despite the rise of digital technologies, analogue signal infrastructure remains widely used across industries: from water and wastewater to chemical, energy and the food and beverage industries. Analogue loops are trusted for their reliability, simplicity and cost-effectiveness. However, maintaining signal integrity, safety compliance and operational flexibility in these systems requires advanced interface solutions.
That’s where the RN series comes in. It bridges the gap between traditional analogue systems and modern control environments, offering smart signal conditioning and processing capabilities that enhance performance without overhauling existing infrastructure.
Smart signal management for safer operations
The RN series is designed to support intrinsically safe applications up to safety integrity level two (SIL 2) and systematic capability three (SC 3) in accordance with IEC 61508. This ensures reliable power supply and signal integrity in hazardous areas, helping operators maintain safe and efficient operations. These capabilities provide enhanced control and flexibility, making the RN series suitable for both simple and complex systems.
A portfolio built for versatility
The RN series includes a wide range of modules tailored to different application needs:
RN22: Active/passive barrier and signal doubler.
RLN22/RLN42: NAMUR isolating amplifiers for limit detection and fault monitoring.
RNO22: Output isolating amplifiers for actuators and control valves.
RNB22: System power supply (24V DC) with high efficiency and redundancy support.
RNF22: Feed-in and error message module for centralised power and fault signalling.
Each module integrates seamlessly with Endress+Hauser instruments and third-party devices, offering plug-and-play readiness for DIN rail installations.
Compact design meets high performance
Space constraints in control cabinets are a common challenge. With up to two channels in just 12,5 mm width, the RN series is ideal for space-constrained control cabinets. The T-connector bus system supports interoperability with other interface vendors. This allows for efficient use of space without compromising functionality. It also further simplifies installation and commissioning, enabling fast setup and easy expansion. Whether you’re building a new system or retrofitting an existing one, the RN series makes integration straightforward.
Customer-centric benefits
Endress+Hauser has engineered the RN series with usability and lifecycle support in mind.
Key benefits include:
• Easy selection and ordering via product configurators and cross-reference tools.
• Quick installation with pluggable terminals and DIN rail compatibility.
• High compatibility with existing systems and interface vendors.
• Robust performance across wide temperature ranges and environmental conditions.
• Error monitoring and diagnostics for proactive maintenance.
These features reduce engineering time, simplify project planning, and improve long-term reliability.
Supporting the full lifecycle
From procurement to commissioning and service, Endress+Hauser offers a single-source partnership throughout the product lifecycle. This ensures consistent support, streamlined logistics and expert guidance at every stage. The RN series is particularly valuable in industries where safety and compliance are critical. Its SIL-rated components and Ex-certified variants make it ideal for hazardous areas and safety instrumented systems.
Modernising with confidence
The RN series replaces legacy products such as the RN221N and RNB130, offering modernised features and improved performance. With extended certifications and global approvals, including ATEX, IECEx, SIL and more, the RN series is ready for deployment in regulated environments worldwide.
Its compatibility with well-known interface suppliers also facilitates the expansion of existing plants, making it a futureproof investment for industrial automation.
Real-world applications
The RN series is already making an impact across various sectors:
• Water/wastewater: Reliable signal transmission and fault monitoring for level and flow sensors.
• Chemical: Safe operation in hazardous zones with Ex-certified barriers and amplifiers.
• Energy: Efficient power supply and signal conditioning for control valves and actuators.
• Food and beverage: Compact installation and easy maintenance in hygienic environments.
These applications demonstrate the RN series’ versatility and value in real-world scenarios.
A timeless solution for today’s challenges
As industries seek reliable, scalable and safe solutions for analogue signal processing, the RN series offers a proven path forward with its smart features, compact design and lifecycle support.
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| www: | www.endress.com |
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