The Endress+Hauser 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.

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)