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RLN42 2-channel, wide-range isolating amplifier with universal power supply

RLN42 NAMUR isolating amplifier

NAMUR isolating amplifier, 2-channel with 24 to 230 V AC/DC and NAMUR or switching contact input as well as relay output, optionally with SIL and Ex

RLN42
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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.

RLN42 2-channel NAMUR isolating amplifier with universal power supply and relay signal output
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©Endress+Hauser

RLN42 isolating amplifier, NAMUR switch

The RN Series interface offering including the RLN42 isolating amplifier
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The RN Series interface devices including the RLN42 isolating amplifier

RN Series interfaces installed in a control cabinet
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The RN Series interface modules with RLN42 isolating amplifier being commissioned

RLN42 isolating amplifier, NAMUR switch

Specs at a glance

  • Input

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

  • Output

    relay contact

  • Power Supply

    20...250 V AC/DC

Field of application

The NAMUR isolating amplifier is designed for safe operation of proximity switches according to EN 60947-5-6 (NAMUR) as well as open and mechanical contacts with resistive coupling elements. It has a universal power supply (24 to 230 V AC/DC) and one relay output (changeover) per channel. The device is approved for intrinsically safe (Ex i) circuits up to zone 0 (gas) and zone 20 (dust) in the Ex area. RLN42 can be used in safety equipment up to SIL 2 in accordance with IEC 61508.

  • Isolating amplifier for the galvanically isolated transmission of binary switching signals, also for use in hazardous areas (Zone 2/Div. 2)

  • Wide-range power supply from 19.2 to 253 VAC/DC

  • Input for proximity sensors according to NAMUR (IEC 60947-5-6) and for potential-free contacts or contacts with resistance circuits

  • Optionally available with resistive coupling element for cable monitoring of mechanical switching contacts

Benefits

  • Quick and easy wiring using screw or push-in terminals

  • Up to SIL 2 in accordance with IEC 61508 for high functional safety

  • Compact housing: 17.5 mm (0.69 in) for efficient use of space in control cabinets

  • Output-side relay contacts as signal output; direction of action can be selected via DIP switches

  • For ambient temperatures –40 to 60 °C (–40 to 140 °F)

  • Monitoring of the input circuits for line faults such as line break and short-circuit (LFD), disengageable

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