Specs at a glance Input: 0/4…20 mA / HART passive Output: 0/4…20 mA / HART active Power Supply: 24 V DC ---------------------------------------- Field of application Endress Hauser's The RNO22 output isolating amplifier is used to safely control active components such as control valves, actuators, I/P converters or indicators. The intrinsically safe device separates and transmits analog 0/4 to 20 mA signals and offers bidirectional HART® transparency for digital communication with smart actuators. The compact interface device with up to two galvanically isolated channels enables open- and short-circuit monitoring for reliable operation of critical equipment. • 1- or 2-channel output isolating amplifier • Reliable control of active components such as control valves, current-to-pressure transducers • Transmission and galvanic isolation of 0/4 to 20 mA signals • Intrinsically safe [Ex-ia], installation in Ex Zone 2 • Suited for use in safety instrumented systems up to SIL 2 (SC 3) in accordance with IEC 61508 • Bidirectional transmission of digital HART® communication signals • Ambient temperature range: –40 to 70 °C (–40 to 158 °F)