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RLN22 1- or 2-channel, 24 V DC, isolating amplifier with relay signal output for systems up to SIL 2

RLN22 NAMUR isolating amplifier

NAMUR isolating amplifier, 1/2-channel with 24 V DC and NAMUR or switching contact input as well as relay output, optionally with SIL and Ex

RLN22
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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.

RLN22 1- or 2-channel, 24 V DC, isolating amplifier with relay signal output for systems up to SIL 2
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©Endress+Hauser

RLN22 isolating amplifier for safe and reliable switching operations

The RN Series interface offering including the RLN22 isolating amplifier
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The RN Series interface devices including the RLN22 isolating amplifier

RN Series interfaces installed in a control cabinet
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The RN Series interface modules with RLN22 isolating amplifier being commissioned

RLN22 isolating amplifier for safe and reliable switching operations

Specs at a glance

  • Input

    NAMUR
    blocking: < 1,2 mA
    conducting: > 2,1 mA

  • Output

    relay contact

  • Power Supply

    24 V DC

Field of application

The RLN22 is a compact 1- or 2-channel, 24 VDC isolating amplifier with relay signal output. It is designed to safely operate e.g. proximity sensors or point level switches such as the Liquiphant FTL51B (NAMUR) as per IEC 60947-5-6.
The DC interface monitors line faults such as breaks or short-circuits of sensors or mechanical switching contacts. The device is suited for use in hazardous areas and safety instrumented systems up to SIL 2 in accordance with IEC 61508.

  • Isolating amplifier for the transmission of binary switching signals

  • Input for proximity sensors, open contacts or contacts with resistive coupling elements

  • Galvanic isolation (3-way)

  • Line fault monitoring of input circuits or mechanical switching contacts

  • Group error message via DIN rail bus connector

  • Output-side relay contacts, direction of action (operating or quiescent current behavior) via DIP switch selection

  • Ambient temperature range: –40 to 60 °C (–40 to 140 °F)

Benefits

  • Safe and reliable switching operations: trust your critical applications

  • Compact housing: up to 2 channels on 12.5 mm (0.49 in) for efficient use of space in control cabinets

  • Installation in hazardous areas; Ex approval for Ex zone 2

  • Up to SIL 2 in accordance with IEC 61508

  • Quick and easy wiring and commissioning: plug-in terminals, power supply and group error message module via DIN rail bus connector

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