Allen-Bradley 1756-CN2 ControlNet Bridge Module for ControlLogix

Product Overview

The Allen-Bradley 1756-CN2 is a bridge module for the ControlLogix platform. It connects ControlNet networks to the chassis. This module supports up to 99 nodes. It handles 131 connections at 5 megabits per second. The 1756-CN2 uses a standard configuration. It draws 1100 milliamps at 5.1 Volts DC. It also draws 3 milliamps at 24 Volts DC. The module dissipates 5.6 Watts of power. This equals 19.1 BTU per hour. It occupies one slot in the chassis. The module weighs 0.57 pounds or 0.26 kilograms.

Application Scenarios

Use this module in industrial automation systems. It works well for discrete manufacturing. It also fits process control applications. The module connects controllers to remote I/O. It links drives and other devices. The ControlNet network provides deterministic control. This module is ideal for high-speed applications. It supports real-time data exchange. Use it in automotive, food, and beverage plants. It also works in oil and gas facilities.

Technical Specifications

The module has three ports. These are ControlNet BNC, ControlNet RJ45, and USB 1.1. It uses quad shield RG6 coaxial cable. The isolation voltage is 30V. The insulation type is basic. It is tested at 500V for 60 seconds. The temperature code is T4A in North America. It is IEC T4 in Europe. The enclosure is open-style. The operating temperature range is 0 to 60 °C. Relative humidity is 5-95% with condensation. It handles 2.0G vibration at 10-500Hz. It withstands shock up to 30G.

Installation & Maintenance Guide

Install the module in any ControlLogix chassis slot. Ensure the chassis power is off. Insert the module firmly into the slot. Tighten the screws to secure it. Connect the ControlNet cable to the BNC or RJ45 port. Use the USB port for local configuration. Do not exceed the maximum nodes or connections. Keep the module within the temperature range. Avoid exposure to excessive vibration or shock. Clean the module with a dry cloth. Do not use solvents.

Packing List

The package includes one Allen-Bradley 1756-CN2 module. It also includes a quick start guide. No cables are included. No software is included. The module is shipped in anti-static packaging. Shipping is via FedEx, UPS, or DHL.