RN221N
Active barrier with optional HART® diagnosis

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

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

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...

  • 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