Endress+Hauser RMA 422 Process Transmitter (RMA422-B21A22A) with 4-20mA I/O and Ex Certification

Endress+Hauser RMA 422 Process Transmitter (RMA422-B21A22A) with 4-20mA I/O and Ex Certification

The Endress+Hauser RMA 422 is a reliable Process Transmitter and Indicator designed for processing and displaying analog signals in various industrial applications. This specific unit RMA422-B21A22A, is configured for precise signal handling and monitoring, suitable for use in hazardous areas.

This version of the RMA 422 accepts a standard 4-20 mA analog input signal, making it compatible with a wide range of industrial sensors. It provides a 4-20 mA analog output signal, allowing for re-transmission of the measured value to control systems or other devices. Additionally, it includes relay outputs with contact ratings up to 250 V AC / 5 A, enabling direct switching or alarm functions based on process conditions.

The RMA 422-B21A22A operates on a flexible power supply of either 18-36 V DC or 20-28 V AC, with a power consumption of 11 VA. Its robust design is suitable for an ambient temperature range of -20°C to +60°C.

A key feature of this specific model is its Ex certification (PTB 00 ATEX 2065), making it suitable for installation and operation in designated hazardous areas according to the specified protection types ([EEx ia] IIC, II (1)GD) and electrical parameters (Uo, Io, Po, Co, Lo).

The unit features a built-in display for local indication of process values and utilizes screw terminals for secure electrical connections. It is typically mounted on a 35mm DIN rail.

Manufactured in Germany in 2010, the Endress+Hauser RMA 422-B21A22A is a reliable and certified instrument for signal conditioning, monitoring, and control in industrial processes, especially where hazardous area compliance is required.

Key Features:

• Model: RMA 422 (Configuration RMA422-B21A22A)
• Instrument Type: Process Transmitter / Indicator
• Input: 4-20 mA analog
• Output: 4-20 mA analog
• Relay Output: Yes, with max. 250 V AC / 5 A contact rating
• Power Supply: 18-36 V DC / 20-28 V AC, 11 VA
• Ambient Temperature: -20°C to +60°C
• Ex Certification: PTB 00 ATEX 2065, [EEx ia] IIC, II (1)GD
• Display: Integrated (as seen on other RMA422 units)
• Mounting: DIN rail (typical)
• Connections: Screw terminals
• Manufacturing: Made in Germany 2010
• Certifications: CE, Ex, cULus 
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• On this page you will find the user manual for Endress+Hauser RMA 422. Get detailed technical specifications, installation and operating instructions to ensure optimum performance and reliability.

Manual for Endress+Hauser RMA422