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
Manufacturer
Allen-Bradley
Model
1771-ACNR15
Product Type
ControlNet Remote I/O Adapter
Communication
ControlNet (1.5 and beyond)
Media Support
Two-port redundant
Weight
0.96 kg
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.
