Power Supplies & Barriers

Power Supplies & Barriers

Endress+Hauser Power Supplies & Barriers ensure stable power and clean, galvanically isolated signals for transmitters and sensors—even in hazardous areas. They power 2‑ and 4‑wire devices, isolate 4–20 mA/HART® loops, and support intrinsic safety with HART monitoring to catch brief faults. The portfolio spans compact DIN‑rail interface modules, plus companions such as the RMA42 process transmitter (with integrated loop power) and the FXA42 gateway for remote visualization and logging.

Individually, the lineup includes: RNB22, a 24 VDC/2.5 A DIN‑rail supply; RNF22, a power feed‑in/error module enabling redundant 24 VDC with group‑error signaling; RN42, an active barrier that powers loops and provides galvanic isolation with bidirectional HART transparency and a 24…230 V AC/DC supply; RB223, a passive barrier that needs no power and safely separates Ex/non‑Ex circuits with HART pass‑through; RLN42, a NAMUR isolating amplifier with relay outputs and a universal 20…250 V AC/DC supply; RNO22, an output isolating amplifier for valves and I/P converters; plus RMA42, a universal process transmitter with loop power and FXA42 for analog/digital inputs and Modbus.

E+H Power Supplies & Barriers provide a host of benefits: galvanic isolation prevents ground loops and shields PLC/DCS inputs; Ex approvals and SIL options (device‑dependent) support the safety lifecycle. HART‑transparent paths let you configure/verify smart devices without breaking the loop; monitoring and alarm relays provide early warning of sensor or wiring faults. Wide‑range or redundant supplies improve uptime, and group‑error diagnostics simplify troubleshooting. For dispersed assets, FXA42 adds browser dashboards, logging, and email/SMS alarms.

Typical applications: powering head transmitters in temperature assemblies and forwarding isolated 4–20 mA to controllers; using passive barriers when a PLC must supply a sensor in the Ex area; interfacing NAMUR proximity sensors or vibronic level switches to relay inputs; and safely actuating control valves and I/Ps from DCS outputs. Remote tank and utility monitoring—with limit alarms, history and Modbus—is straightforward via FXA42. These building blocks serve chemical, water, oil & gas/marine, life sciences, power, and other industries where loop integrity and availability matter.

TriNova, your trusted Endress+Hauser Representative since 2002.