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RN22 active barrier

Active barrier, 1/2-channel/SD for 4 to 20 mA, HART® transparent with 24 V DC as well as active/passive input and output, optionally with SIL and Ex

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RN22 active barrier

Active barrier, 1/2-channel/SD for 4 to 20 mA, HART® transparent with 24 V DC as well as active/passive input and output, optionally with SIL and Ex

This product is stocked in various preconfigured variants that usually ship within just 2 working days.
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Benefits

  • Intrinsically safe interface device suited for use in safety instrumented systems up to SIL 2 (SC 3) in accordance with IEC 61508
  • Quick and easy wiring with screw or push-in terminals or power supply via power rail T-connector
  • Easy access to frontside HART® connection taps
  • Compact housing: up to two channels on 12.5 mm (0.49 in) for efficient use of space in control cabinets
FLEXible answers to individual needs
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RN22 active barrier

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Variable
5-year warranty

Engineered for Confidence

Our Fundamental Selection instruments feature an extended 5-year warranty – a clear testament of our trust in their long-term reliability and performance.

Should a warranty case occur, you can count on a fast replacement process and minimal administrative effort – giving you peace of mind when it matters most and helping you keep your operations running smoothly.

Warranty terms apply

The extended warranty is subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

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Product information

Specifications
Measuring / Application task Power supplies & barrier
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Description

The 1- or 2-channel RN22 active barrier powers analog instrument loops and safety instrumented systems up to SIL 2 (SC 3). The intrinsically safe, HART® transparent interface establishes a reliable link between field devices and process control. It interfaces with 2-/4-wire devices in hazardous areas and provides a second galvanically isolated signal output acc. to NAMUR NE 175. This opens a second channel for the process optimization domain without affecting the traditional automation system.

Field of application
  • Single- or two-channel active barrier, power supply or signal doubler
  • 0/4 to 20 mA analog signal transmission (NAMUR NE 43) and galvanic isolation
  • Intrinsic safety for operation in hazardous areas (Zone 2)
  • Bidirectional HART® communication (transparent)
  • 2- and 4-wire capability for instruments in hazardous areas (Zones 0/20)
  • Ambient temperature range: -40 … 60 °C (-40 … 140 °F)
Benefits
  • Intrinsically safe interface device suited for use in safety instrumented systems up to SIL 2 (SC 3) in accordance with IEC 61508
  • Quick and easy wiring with screw or push-in terminals or power supply via power rail T-connector
  • Easy access to frontside HART® connection taps
  • Compact housing: up to two channels on 12.5 mm (0.49 in) for efficient use of space in control cabinets
Downloads
Most downloaded
Operating Instruction (BA)
BA RN22 Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output
, optionally available with SIL and Ex
English version - 04/2025
Download
Technical Information (TI)
TI RN22 Active barrier
English version - 04/2025
Download
Short Instruction (KA)
KA RN22 Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output
, optionally available with SIL and Ex
English version - 04/2025
Download
The CAD Drawings will be available after the configuration.
All downloads
38 Downloads
Technical Information (TI)
Most downloaded
TI RN22 Active barrier
English version - 04/2025
Download
Operating Instruction (BA)
Most downloaded
BA RN22 Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output
, optionally available with SIL and Ex
English version - 04/2025
Download
Short Instruction (KA)
KA RN22 Active barrier, 1-/2-channel/SD for 4 to 20 mA, HART®-transparent with 24 V <sub>DC</sub> as well as active/passive input and output
, optionally available with SIL and Ex
English version - 04/2025
Download
Ex Safety Instruction (XA)
XA RN22, RN42 Ex tc IIIC Dc
English version - 01/2023
Download
Ex Safety Instruction (XA)
RN22, RN42 [Ex ia Ga] IIC
[Ex ia Da] IIIC
Ex ec IIC Gc
English version - 09/2022
Download
Ex Safety Instruction (XA)
XA RN22, RN42 [Ex ia Ga] IIC
[Ex ia Da] IIIC
Ex ec IIC Gc
English version - 05/2023
Download
Ex Safety Instruction (XA)
XA RN22, RN42 ATEX, IECEx:
II(1)G [Ex ia Ga] IIC
II(1)D [Ex ia Da] IIIC
II3G Ex ec IIC Gc
English version - 05/2023
Download
Ex Safety Instruction (XA)
XA RN22, RN42 [Ex ia Ga] IIC
[Ex ia Da] IIIC
Ex ec IIC Gc
English version - 10/2023
Download
Ex Safety Instruction (XA)
XA RN22, RN42 [Ex ia Ga] IIC X
[Ex ia Da] IIIC X
Ex ec IIC Gc U
English version - 05/2026
Download
Special Documentation (SD)
Device viewer Technical documentation in other languages
English version - 07/2021
Download
Functional Safety (FY)
RN22, RN42 Active barrier for isolating 4 to 20 mA standard signal circuits,
HART-transparent
English version - 10/2021
Download
Fields of Activities (FA)
コンポーネントカタログ HAW562-
HAW569-
MS20-
MS21-
RA33-
RB223-
RDL10-
READWIN-
RH33-
RIA14-
RIA15-
RIA16-
RIA45-
RIA452-
RIA46-
RID14-
RID16-
RID261-
RLN22-
RLN42-
RMA42-
RMC621-
RMS621-
RN22-
RN221N-
RN42-
RNB22-
RNF22-
RNO22-
RS33-
RSG30-
RSG35-
RSG40-
RSG45-
RXO20
Japanese version - 08/2022
Download
Fields of Activities (FA)
시스템 제품 및 데이터 관리자 - 시그널 루프 구성 솔루션 시스템 제품 및 데이터 관리자 - 시그널 루프 구성 솔루션
Korean version - 03/2024
Download
Innovation (IN)
RN Series Zuverlässige Signalverarbeitung und -aufbereitung Spannungsversorgungen, Speisetrenner und
Trennschaltverstärker für Sensoren und
analoge Signale
German version - 06/2023
Download
Innovation (IN)
RN 시리즈 - 신뢰할 수 있는 신호 처리 및 조절 보장 RN시리즈 - 신뢰할 수 있는 신호 처리 및 조절 보장
Korean version - 09/2021
Download
Innovation (IN)
Innovation brochure about the RN Series RN Series - Reliable signal processing and conditioning
English version - 06/2023
Download
Innovation (IN)
RN Series Traitement et conditionnement fiable des signaux
French version - 09/2021
Download
AI (Application note)
Saving energy with smart e-boiler monitoring Boosting sustainability with real-time energy insights
English version - 12/2025
Download
AI (Application note)
Energie sparen mit intelligenter E-Boiler Überwachung Mehr Nachhaltigkeit durch Echtzeit-Energieüberwachung
German version - 12/2025
Download
Manufacturer Declaration
Product family: Accessories: System components, Contactors/transmitters, Ecograph, Memo-Graph, Over voltage protector, Power supply and barrier, Process displays, Soliswitch Product root: FMA90-, FTE20-, HAW566-, HAW568-, RA33-, RB223-, RH33-, RIA14-, RIA15-, RIA16-, RIA45-, RIA452-, RIA46-, RID14-, RID16
-, RLN22-, RLN42-, RMA42-, RN22-, RN42-, RNF22-, RNO22-, RS33-, RSG35-, RSG45-
Declaration number: HE_02283_01.25
Manufacturer specification: RoHS
Additional information: China RoHS
English version - 11/2025
Download
EU Declaration
Product family: Power supply and barrier Product root: RN22-
Declaration number: EC_00922_01.21
English version - 07/2021
Download
EU Declaration
Product family: Power supply and barrier Product root: RN22-, RN42-
Declaration number: EU_01005_01.22
English version - 04/2023
Download
UK Conformity Assessed
Product family: Power supply and barrier Product root: RN22-, RN42-
Declaration number: UK_00558_01.23
English version - 04/2023
Download
UK Conformity Assessed
Product family: Power supply and barrier Product root: ORN22-, RN22-
Declaration number: UK_00463_01.21
English version - 12/2021
Download

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RN22 active barrier
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RN22 active barrier
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Spare parts and accessories

further parts
further parts

Terminal set 2pol. DIN rail screw

further parts
further parts
Order code 71505292
further parts
further parts

Terminal set 2pol. DIN rail push-in

further parts
further parts
Order code 71505320
further parts
further parts

Flap 12.5 W25 DIN rail housing

further parts
further parts
Order code 71505347

Power rail connector DIN rail 12.5mm

Order code 71505349
Spare parts & accessories

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RN22 intrinsically safe isolating barrier, power supply and signal doubler for hazardous areas
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Spare parts and accessories

further parts
further parts

Terminal set 2pol. DIN rail screw

further parts
further parts
Order code 71505292
further parts
further parts

Terminal set 2pol. DIN rail push-in

further parts
further parts
Order code 71505320
further parts
further parts

Flap 12.5 W25 DIN rail housing

further parts
further parts
Order code 71505347

Power rail connector DIN rail 12.5mm

Order code 71505349
Spare parts & accessories