Endress+Hauser 2 Channel Zener Barrier, Current Input, ATEX

Intrinsically safe active barrier that provides power and safety to analog instrument loops and SIL systems, establishing a reliable signal link between field devices and process control level.

The RN22 is a 1- or 2-channel active barrier, power supply or signal doubler for safe separation of 4 to 20 mA standard signal circuits. The device safely powers analog instrument loops and safety instrumented systems up to SIL 2, SC 3 (according to IEC 61508). The HART® transparent interface device establishes a reliable signal link between field devices and process control. It interfaces with 2- or 4-wire instruments in Zone 2 hazardous areas and provides a second, galvanically isolated signal output acc. to NAMUR NE 175. This opens a second channel for the process optimization domain without affecting the traditional automation system.

Connection lugs integrated on front for HART communicators
Simple and quick wiring with plug in terminals

Active barrier for safe separation of standard signal circuits
Compact housing
Quick and easy wiring
Intrinsic safety for operation in hazardous areas (Zone 2)
For safety-oriented applications up to SIL 2 (SC 3) in accordance with IEC61508 (optional)