Endress + Hauser – RN221N‑B1 – Active Barrier / Transmitter Supply 20‑250 V AC/D

The Endress + Hauser RN221N‑B1 is an active isolation barrier designed to provide galvanic isolation and loop power to 4…20 mA current‑loop transmitters. It supports bidirectional HART® communication, an intrinsically safe input option and is suitable for hazardous‑area installations (ATEX).