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RN221N
Active barrier with optional HART® diagnosis

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

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

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.

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

Field of application

  • 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

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Predecessor: HAA420Z, NY9170, RN221

Contact

Endress+Hauser Instruments International AG
Middle East Support Centre 7WB-2100, Dubai Airport Free Zone P.O. Box 293828 Dubai United Arab Emirates
Tel.: +971 4 253 51 00
Tel.: +971 4 609 18 11
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