B&R X20AI4632 Analog Input Module

The B&R X20AI4632 is a high-precision analog input module within the X20 I/O system, offering four channels configurable for voltage (±10V, 0-10V) or current (0-20mA, 4-20mA) signals. Each channel features 16-bit resolution, galvanic isolation, and hardware filtering, making it suitable for demanding measurement tasks in process automation and machine control. The module is hot-swappable and can be integrated into any X20 CPU or bus controller system.

Technical Specifications

Input type: differential, configurable per channel. Conversion time: 1 ms (standard mode) or 0.5 ms (fast mode). Accuracy: ±0.1% of full scale at 25°C (±0.3% over entire temperature range). Impedance: ≥ 1 MΩ for voltage inputs, 250 Ω for current inputs (external burden optional). The module also provides overvoltage protection up to ±30V DC and reverse polarity protection on power supply. The integrated 10 Hz low-pass filter reduces electrical noise interference.

Power consumption from X20 bus: 0.25 W typical. Internal I/O supply 5V DC from backplane. The operating temperature range is -25°C to +60°C, with storage down to -40°C. The module meets EN 61131-2 standards and is certified for marine applications (DNV GL).

Key Features

• 4 analog input channels, individually configurable

• Voltage ranges: ±10V, 0-10V, 0-5V, ±5V

• Current ranges: 0-20mA, 4-20mA (sink/source)

• 16-bit resolution (0.003% of range)

• Galvanic isolation between channels and bus (500V DC)

• Diagnostic LEDs per channel (overrange/underrange)

• Hot-pluggable (X2X Link support)

• Removable terminal block (TB712 series)

Configuration and Software

Using B&R Automation Studio, engineers can assign measurement ranges, scaling, and digital filtering per channel. The module supports cyclic data exchange with update rates up to 2 kHz. Real-time values are represented as integer or floating-point variables. The module also provides min/max value capture and wire-break detection for current loops. Configuration parameters are stored redundantly within the X20 system.

Integration with B&R Ecosystem

The X20AI4632 is fully compatible with all X20 CPUs (e.g., X20CP1586, X20CP3484) and fieldbus couplers (POWERLINK, PROFINET, EtherCAT). It can be combined with digital I/O, temperature inputs, and motion control modules in a single station. The module’s small footprint (12.5mm width) allows high-density installation. Up to 64 modules can be connected per X20 bus controller.

Typical Applications

Common uses include monitoring pressure sensors, flow meters, level transmitters, thermocouples (via external transmitter), and analog joysticks. The module also suits PID loop feedback and data acquisition systems for test benches. Its high accuracy and isolation make it ideal for environments with mixed signal domains, such as battery manufacturing, chemical mixing, and water treatment.

Installation and Maintenance

Mounting is via standard 35mm DIN rail. The module automatically configures itself when connected to the X20 bus. No external power supply is required for analog circuits. Calibration is factory-performed and traceable; field calibration is possible using Automation Studio’s calibration utility. The module’s front LEDs indicate channel status, bus communication, and error conditions, simplifying troubleshooting.

Conclusion

The B&R X20AI4632 analog input module provides a flexible, accurate, and robust solution for acquiring analog signals in modern industrial control systems. Its configurable channels, electrical isolation, and seamless integration into the X20 platform reduce engineering effort while ensuring high signal integrity. For applications requiring precise measurement of voltage or current sensors, the X20AI4632 is a dependable choice.