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
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