Module d'entrée analogique multifonction 2 canaux série X20AI2622 B&R X20

Product Overview

The X20AI2622 (X20AI2622) is a high-precision analog input module within the B&R X20 system, designed for high-resolution signal acquisition in demanding industrial environments. This multifunctional module features 2 analog inputs that can be individually configured to measure either voltage ($\pm$10 V) or current (0 to 20 mA / 4 to 20 mA). With a 12-bit resolution and advanced filtering capabilities, the X20AI2622 is an essential component for monitoring critical process variables such as pressure, temperature, and flow rate in sectors like pharmaceutical manufacturing, precision CNC machining, and power plant automation. Its compact X20 slice design allows for seamless integration into existing I/O stacks, providing high-density data acquisition with minimal power overhead.

Technical Configuration

The hardware architecture of the X20AI2622 is engineered for versatility and low power consumption, drawing only 0.01 W from the internal bus. It features two independent channels that can handle bipolar voltage signals or unipolar current loops, providing flexibility for diverse sensor types. The module includes comprehensive status diagnostics, with dedicated LED indicators for the I/O function of each channel, the overall operating state, and the module status. For current measurements, the module provides a low input resistance to ensure signal accuracy, while voltage measurements benefit from high input impedance to prevent signal loading. The integration of digital filters allows for the suppression of 50/60 Hz interference, ensuring stable readings in electrically noisy environments.

Technical Specifications

Technical FAQs

How do I switch between voltage and current measurements on the X20AI2622?

The measurement mode for each channel is configured via software in B&R Automation Studio. No physical jumpers are required on the module; the hardware automatically adjusts the internal input circuit based on the parameters set in the I/O configuration of your project.

What is the benefit of the 12-bit resolution for industrial sensing?

A 12-bit resolution provides 4,096 distinct steps across the signal range. For a 4 to 20 mA signal, this allows the module to detect changes as small as approximately 0.0039 mA, ensuring high-precision control for sensitive process loops like proportional valve positioning or weight measurement.

Can this module detect a broken wire in a 4 to 20 mA sensor loop?

Yes. When configured for the 4 to 20 mA range, the module can detect if the signal falls below the 4 mA threshold. This condition is reported via the module's diagnostic registers to the PLC, allowing for immediate identification of open circuits or sensor failures.

Engineering & Installation Guide

• Shielding and Noise Suppression: To maintain the precision of the 12-bit analog-to-digital conversion, always use twisted-pair shielded cables. The shield should be connected to the functional earth (FE) using the X20 system's shield terminals. This is particularly important when signal lines are routed near variable frequency drives (VFDs) or high-voltage relay banks.

• Terminal Block Selection: The X20AI2622 is typically used with a 12-pin terminal block (e.g., X20TB12). Ensure that the common reference point for current loops is correctly wired according to the B&R wiring diagram to prevent ground loops that could introduce offset errors into the measurement.

• Heat Dissipation and Mounting: While the module consumes very little power (0.8 W internal), it should be mounted horizontally whenever possible to facilitate natural convection. In high-density racks, avoid placing the analog module immediately adjacent to high-current digital output modules to prevent thermal drift from affecting the analog accuracy.