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

RN42 active barrier, wide range power supply

1-channel wide range supply and active barrier for safe isolation of 4 to 20 mA standard signal circuits

RN42
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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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  • E
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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

    20...250 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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Success stories

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    Functional Safety in practice

    Investments in functional safety, and thus in measures to avoid accidental and systematic errors, are very moderate if one relies on instruments developed according to IEC 61508.

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