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Product picture active barrier RN221N

RN221N
Active barrier with optional HART® diagnosis

Active barrier with power supply for safe separation of 4...20 mA current circuits

RN221N
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Active barrier RN221N ©Endress+Hauser
Active barrier RN221N ©Endress+Hauser

Specs at a glance

  • Input

    1 x analog 4...20 mA

  • Output

    1 x analog 4...20 mA

Field of application

The active barrier RN221N supplies e.g. a transmitter with power, if required also in the Ex-area, and then transmits the galvanically isolated signal. With the optionally available HART® monitoring the status of the transmitter is monitored. If an error arises a relay at the RN221N sends an alarm. The relay has to be actively set back. Thus even just briefly occurring errors can be easily located.

  • Galvanic isolation of 4 to 20 mA current circuits

  • Removing large loop circuits

  • Powering 2 wire transmitters

  • Monitoring of SMART transmitters with early-warning system

  • Intrinsically safe sensor supply for Ex-area

Benefits

  • Wide range power supply, flexible power source

  • Compact side by side DIN rail housing

  • International Ex approvals; marine approval

  • Bidirectional HART® transmission. Communication sockets for HART® sensor setting up. Evaluation of status information from connected transmitter with HART® protocol.

  • Primary or secondary master operating mode, automatic selection

  • Sensor monitoring with early-warning system

  • Manual or automatic reset of the relay contact

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