B&R 3AO350.6 2005 Analog Output Module

Product Overview

The B&R 3AO350.6 (3AO 350.6) is a high-precision analog output module designed for the B&R 2005 automation platform. Engineered for industrial control scenarios—such as variable speed drive references, proportional valve control, and process instrumentation—this module features 8 independent outputs with a range of plus/minus 10 V. The 12-bit digital converter resolution ensures high-fidelity signal output, while the rapid conversion time of 250 microseconds across all outputs allows for high-speed synchronization in closed-loop control tasks. Its robust design, including integrated short-circuit protection, minimizes the risk of component failure in complex, high-density machine control cabinets.

Technical Configuration

The 3AO350.6 module is optimized for the 2005 series architecture, fitting into both base and expansion units with a single-width form factor. The module provides electrical isolation between the I/O channels and the PLC backplane, effectively shielding the processor from potential voltage transients on the field side. For field wiring, the module requires the 3TB170 series terminal blocks, available in either screw or cage clamp versions. Diagnostics are streamlined via integrated LEDs, which provide visual feedback on converter status and overall module health, allowing engineers to quickly verify signal integrity during installation or troubleshooting.

Technical Specifications

FAQs

Is the terminal block included with the 3AO350.6?

No, the terminal block must be ordered separately. You can select either the 3TB170.9 (screw clamps) or the 3TB170.91 (cage clamps) depending on your specific cabling requirements.

Are the analog channels electrically isolated from each other?

No, the 8 channels are not electrically isolated from each other; however, all channels are electrically isolated from the PLC backplane to protect the controller.

What is the basic accuracy of the output signal?

The basic accuracy of the analog outputs is plus/minus 0.25% at 20 deg C.

Installation and Operational Guidelines

• Signal Integrity: Because the channels share a common ground potential, use shielded twisted-pair cabling for all analog output signals. Ensure the shield is terminated correctly to a common reference ground at the cabinet entry point to prevent ground loops, which can introduce noise and degrade the 12-bit output precision.
• Protection Requirements: The module includes short-circuit protection; however, always ensure that the connected load impedance does not drop below the manufacturer-recommended threshold. In cases of long cable runs, consider using local signal conditioners to maintain voltage levels.
• Environmental Considerations: The module is rated for operation between 0 and 60 deg C. Ensure that the 2005 series rack is mounted in a well-ventilated cabinet. In high-density installations, verify that the airflow is not obstructed by cable bundles or other components, as thermal accumulation can shift the analog output accuracy beyond the specified limits.