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

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

RN22
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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.

RN22 intrinsically safe isolating barrier, power supply and signal doubler for hazardous areas
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©Endress+Hauser

RN22 active barrier, power supply, analog signal doubler

The RN Series interface devices with RN22 active barrier
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©Endress+Hauser

RN Series interface devices including the RN22 active barrier

RN Series interface modules and RN22 active barrier installed in a control cabinet
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RN Series interface modules including RN22 being commissioned in a control cabinet

RN22 active barrier, power supply, analog signal doubler

Specs at a glance

  • Input

    0/4…20 mA / HART
    feeding/not feeding

  • Output

    0/4…20 mA / HART
    active/passive

  • Power Supply

    24 V DC

Field of application

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.

  • 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

Videos

  • Explained in under 3 minutes - RN22 and RN42

  • Safe signal, safe process - with barriers and galvanic isolation

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