1771-ACNR15/B Allen Bradley I/O Adaptor Module

Application

Enable Remote I/O on ControlNet: It allows 1771 I/O modules to be located in a remote chassis and communicate with a PLC-5 controller over a ControlNet network. This is beneficial for distributing I/O points closer to the field devices, reducing wiring costs and complexity.

Facilitate High-Speed Communication: ControlNet is a high-throughput network, enabling fast and deterministic data exchange between the remote I/O and the controller, crucial for real-time control applications.

Provide Redundant Communication Paths: The redundant media ports enhance system reliability by offering an alternative communication path in case the primary connection fails, minimizing downtime in critical processes.

Key Feature

ControlNet Interface: Enables high-speed (5 Mbit/s) and deterministic communication over a ControlNet network.

Remote I/O Adapter: Allows 1771 I/O modules to be located remotely from the PLC-5 controller.

Redundant Media Ports (on -B version): Provides two BNC connectors for redundant ControlNet media, enhancing network reliability and uptime.

Status Indicators: LEDs provide clear indication of the module's operational status and network health.

Description

The Allen-Bradley 1771-ACNR15-B is a ControlNet I/O Adapter Module designed as a key component within the PLC-5 family of programmable logic controllers. Its primary function is to facilitate communication between a PLC-5 processor and remotely located 1771 series I/O modules over a ControlNet network. This allows for the expansion of the PLC's input and output capabilities to areas distant from the main control cabinet, offering greater flexibility in system design and reduced wiring complexity.The module also features a Network Access Port (NAP), typically an RJ-45 connector, which allows for local connection of programming devices or diagnostic tools for configuration, troubleshooting, and monitoring of the remote I/O subsystem. The 1771-ACNR15-B acts as an intelligent interface, handling the communication protocols necessary for the PLC-5 to seamlessly interact with the I/O modules across the high-speed and deterministic ControlNet network. Its robust design and diagnostic features contribute to the overall stability and maintainability of industrial automation systems.