Endress Hauser RMA 422 Process Transmitter

Description The Endress Hauser RMA422 Process Transmitter is a versatile DIN rail-mounted device designed for precise monitoring and control of analog process signals. It is particularly suited for applications requiring signal conversion, isolation, and alarm handling in industrial environments. �� Key Features Input Channels: Supports 1 or 2 analog current inputs (0–20 mA or 4–20 mA), with optional linearization and square root extraction for flow measurements. Integrated Loop Power Supply: Provides a 17.0–19.7 V, 25 mA power supply for connected sensors, facilitating two-wire transmitter operations. Analog Outputs: Offers 1 or 2 scalable analog outputs (current or voltage) for transmitting processed signals to downstream systems. Alarm Monitoring: Equipped with two changeover relay contacts for alarm setpoint monitoring, enabling prompt response to process deviations. Mathematical Functions: Capable of performing addition, subtraction, and multiplication on input signals to derive new process variables. User Interface: Features an LC display and front-panel push buttons for straightforward configuration and operation. Communication Interfaces: Includes an RS232 interface for setup and measured value output, along with HART® communication sockets for sensor configuration. Safety and Approvals: Boasts intrinsically safe current inputs and loop power supply, with certifications such as ATEX II(1)GD [EEx ia] IIC and marine approval from Germanischer Lloyd. �� Technical Specifications Input Range: 0–20 mA (−0.2 to 22.0 mA) or 4–20 mA (3.85 to 20.5 mA) Input Impedance: 205 Ω Maximum Input Current: 50 mA (without damage) Analog Output Range: 4–20 mA Power Supply Options: 90–253 VAC or 18–36 VDC / 20–28 VAC Isolation Voltage: 375 V AC/DC between inputs A/D Resolution: 13-bit Integration Time: 100 ms for two channels Linearization: Up to 20 points per analog input Operating Temperature Range: 0°C to 50°C