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RN42 active barrier, wide-range power supply of loop-powered transmitters

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

RN42
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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.

RN42 active barrier, wide-range power supply of loop-powered transmitters
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©Endress+Hauser

RN42 active barrier, wide-range power supply

The RN Series interface devices with the RN42 active barrier
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©Endress+Hauser

RN Series interface devices with the RN42 active barrier for the safe separation of 4 to 20 mA standard signal circuits

RN Series interface modules and RN42 active barrier installed in a control cabinet
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©Endress+Hauser

RN42 active barrier, wide-range power supply

Specs at a glance

  • Input

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

  • Output

    0/4…20 mA / HART
    active/passive

  • Power Supply

    24...230 V AC/DC

Field of application

The active barrier is used for transmission and galvanic isolation of 4 to 20 mA/HART signals. The device has an active / passive current input to which a 2- or 4-wire transmitter can be connected directly. The output of the device can be operated actively or passively. The current signal is then available to the PLC / controller or for further instrumentation at pluggable screw or optional push-in terminals.

  • 1-channel active barrier, wide-range power supply

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

  • Optionally intrinsic safe [Ex-ia] signals from hazardous area

  • Bidirectional transmission of HART® communication signals

  • Feeding or not feeding input for 2- or 4-wire instruments 

  • Active or passive signal output

  • Ambient temperature range: -40 … 60 °C (-40 … 140 °F)

Benefits

  • Wide range power supply of 19.2 to 253 V AC/DC

  • Quick and easy wiring thanks to plug-in terminals

  • Optional for safety-oriented applications up to SIL 2 (SC3) in accordance with IEC 61508

  • Optional installation in Ex Zone 2

  • Compact housing width with 17.5 mm (0.69 in) for efficient use of space

  • Option for installation rotated by 180° (terminals for power supply at top or bottom)

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