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RNO22 - 24 V DC, HART® transparent output isolating amplifier for analog 0/4 to 20 mA signals

RNO22 output amplifier

Output amplifier, 1/2-channel for 4 to 20 mA, HART® transparent with 24 V DC and line fault detection, optionally with SIL and Ex

RNO22
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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.

RNO22 output isolating amplifier with 1 or 2 channels
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©Endress+Hauser

RNO22 output isolating amplifier with 1 or 2 channels

RN Series interface devices with the RNO22 output amplifier module
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RN Series interfaces including the RNO22 output amplifier

The RN Series interface devices with RNO22 output amplifier module installed in a control cabinet
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RN Series interfaces with RNO22 output amplifier module being commissioned

RNO22 output isolating amplifier with 1 or 2 channels

Specs at a glance

  • Input

    0/4…20 mA / HART
    passive

  • Output

    0/4…20 mA / HART
    active

  • Power Supply

    24 V DC

Field of application

The RNO22 output isolating amplifier is used to safely control active components such as control valves, actuators, I/P converters or indicators. The intrinsically safe device separates and transmits analog 0/4 to 20 mA signals and offers bidirectional HART® transparency for digital communication with smart actuators.
The compact interface device with up to two galvanically isolated channels enables open- and short-circuit monitoring for reliable operation of critical equipment.

  • 1- or 2-channel output isolating amplifier

  • Reliable control of active components such as control valves, current-to-pressure transducers

  • Transmission and galvanic isolation of 0/4 to 20 mA signals

  • Intrinsically safe [Ex-ia], installation in Ex Zone 2

  • Suited for use in safety instrumented systems up to SIL 2 (SC 3) in accordance with IEC 61508

  • Bidirectional transmission of digital HART® communication signals

  • Ambient temperature range: –40 to 70 °C (–40 to 158 °F)

Benefits

  • Safe and reliable control of active components in hazardous areas

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

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

  • Accurate and reliable signal transmission

  • Line break and short-circuit monitoring

Fundamental selection

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  • Easy to select, install and operate

Technical excellence

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