Allen-Bradley 1771-ACNR15 ControlNet Remote I/O Adapter

Description

The Allen-Bradley 1771-ACNR15 is a ControlNet Remote I/O Adapter module designed for the PLC-5 platform. This module serves as a communication interface, enabling 1771 I/O chassis to communicate over a ControlNet network. It features two-port redundant media support, ensuring high availability and robust data transmission in industrial environments. This specific model is uniquely required for applications utilizing the ControlNet PLC-5 backup system (1785-CHBM).

Features

• Two-port redundant media support for high-reliability communication.
• Designed for ControlNet 1.5 and beyond.
• Compatible with 1771 I/O chassis systems.
• Required for PLC-5 backup system configurations.
• Discontinued by the manufacturer as of 2012.

Applications

This adapter is primarily used in legacy PLC-5 control systems where remote I/O distribution via ControlNet is necessary. It is essential for redundant control architectures requiring the 1785-CHBM backup module.

Technical Specifications

Installation Guidelines

• Ensure the PLC-5 system is powered down before inserting or removing the 1771-ACNR15 module from the chassis.
• Verify that the backplane is clean and free of debris to ensure proper seating of the module.
• Use appropriate ControlNet cabling and ensure proper termination at both ends of the segment to maintain signal integrity.
• Handle the module using ESD-safe practices to prevent damage to internal electronic components.
• Ensure the module is securely latched into the 1771 I/O chassis to prevent intermittent connection issues.

FAQ

Is the 1771-ACNR15 still supported by the manufacturer?

No, this module was discontinued by Allen-Bradley in 2012. It is typically sourced through aftermarket channels for maintenance and repair of legacy systems.

Can I use this module without a redundant ControlNet setup?

While designed for redundant media, the module can function in standard ControlNet environments; however, it is specifically required for systems utilizing the 1785-CHBM backup controller.