B&R X20AO2622 Analog Output Module 2-Channel

Product Overview

The X20AO2622 (X20 AO 2622) is a high-precision 2-channel analog output module within the B&R X20 System, engineered for versatile signal interfacing in complex industrial automation architectures. This module provides the capability to drive both voltage ($\pm10$ V) and current ($0$ to $20$ mA / $4$ to $20$ mA) signals, allowing engineers to interface with a wide variety of actuators, such as proportional valves, frequency inverters, and process controllers. With its $13$-bit resolution and integrated electrical isolation between the channel and the bus, the X20AO2622 ensures signal integrity and noise immunity in harsh electrical environments common in chemical processing, water treatment, and motion control applications.

Technical Configuration

The module architecture is designed for flexibility and rapid signal processing, utilizing a software-configurable setup for channel types.

• Dual Signal Support: Users can switch between voltage and current outputs simply by utilizing different terminal connections, eliminating the need for separate hardware modules for different signal types.

• High-Speed Conversion: Features a conversion time of $200$ $\mu$s for all outputs, paired with a first-order low-pass filter (cutoff frequency $10$ kHz) to provide smooth, stable analog signals.

• Integrated Protection: The outputs are short-circuit proof with current limiting up to $\pm40$ mA, and the module incorporates an internal enable relay to manage startup behavior and prevent erratic signals during system power-up.

• Isolation Integrity: Provides $500$ $V_{eff}$ electrical isolation between the output channels and the internal system bus, protecting the backplane from field-side transients.

Technical Specifications

FAQs

How do I select between voltage and current output on this module?

The selection is handled through physical wiring to specific terminals on the X20 terminal block. Software configuration is also required to set the channel type and range ($\pm10$ V, $4-20$ mA, etc.) to match the physical connection.

What terminal blocks and bus modules are compatible with this unit?

The X20AO2622 is designed for use with the X20TB06 (6-pin) or X20TB12 (12-pin) terminal blocks. It must be mounted on an X20BM11 bus module to interface with the X20 system backplane. These must be ordered separately.

How does the resolution differ between voltage and current modes?

The digital converter resolution is $13$-bit including the sign. Specifically, for voltage, it is $\pm12$-bit ($1$ LSB = $2.441$ mV). For current, it is $12$-bit ($1$ LSB = $4.883$ $\mu$A).

Engineering Guidelines and Environmental Considerations

• Terminal Block Wiring: Ensure that signals are connected to the correct terminals according to the B&R wiring diagram. Using the wrong terminal for a current loop when configured for voltage (or vice versa) may prevent signal output or trigger a module error.

• Thermal Derating at Elevation: For installations exceeding $2000$ meters above sea level, the maximum ambient operating temperature must be reduced by $0.5$ deg C per every $100$ meters of additional elevation to ensure adequate heat dissipation.

• Startup Safety: The internal enable relay ensures the outputs remain in a safe state during the module's boot-up phase. Verify that the "Module Run" LED is steady green before relying on the analog output signal for critical process control.

• Filter Characteristics: The integrated $10$ kHz low-pass filter is sufficient for most industrial applications; however, for high-speed motion loops, the $1$ ms settling time must be factored into the controller's PID loop tuning.