1756-CN2R ControlNet Network Interface Module

Product Overview

1756-CN2R is a ControlLogix ControlNet redundant media bridge module used in industrial PLC communication systems, factory automation networks, production line control cabinets, and maintenance replacement projects. It is designed to provide ControlNet communication for 1756 PLC systems where reliable network connection and redundant media support are required.

This module is commonly used when an automation system needs deterministic network communication between controllers, I/O stations, drives, operator panels, and other industrial devices. The redundant media design is especially useful in applications where communication reliability is important and network interruption may affect machine operation or production continuity.

Main Features

• ControlLogix 1756 series ControlNet bridge module
• Supports redundant media network architecture
• Used for PLC communication, remote I/O, and industrial network integration
• Suitable for factory maintenance, communication replacement, and system repair
• Important module for existing ControlNet-based automation systems

Technical Specifications

Compatible System and Chassis Use

1756-CN2R is installed in ControlLogix 1756 chassis systems together with controllers, power supplies, I/O modules, and other communication modules. Before replacement, users should confirm the chassis slot, firmware revision, node address, ControlNet schedule, cable connection, redundant media configuration, and project setup. Communication modules should be selected according to the actual network structure, not only by appearance.

Industrial Applications

This module is used in manufacturing lines, process automation systems, material handling equipment, packaging machinery, utility control systems, production monitoring networks, and legacy PLC communication systems. It is especially relevant for plants that still maintain ControlNet network architecture and need reliable spare parts for downtime recovery.

Maintenance and Replacement Notes

When replacing 1756-CN2R, confirm the complete catalog number, firmware version, network address, ControlNet cabling, chassis compatibility, and original nameplate. Communication faults may also be caused by cable problems, incorrect network schedule, node conflicts, connector issues, or configuration mismatch. The network should be checked before replacing the module.

Related Models

Related models include 1756-CN2, 1756-CN2R, 1756-CNB, and 1756-CNBR. These models may differ by communication capacity, redundant media support, lifecycle status, firmware support, or system compatibility.

Inquiry and Supply Notes

DF Automatic supplies ControlLogix ControlNet communication modules, EtherNet/IP modules, DeviceNet modules, PLC controllers, I/O modules, power supplies, chassis, terminal blocks, and industrial automation spare parts for factory maintenance, network repair, and production line recovery.

Company Profile

DF Automatic supplies industrial automation spare parts, control system components, and replacement parts to customers worldwide.

Our product range covers PLC modules, servo drives, servo motors, variable frequency drives, HMI panels, industrial sensors, pneumatic components, hydraulic components, power supplies, electrical control devices, and industrial communication modules.

These products are used in CNC machinery, packaging equipment, robotics, production lines, water treatment systems, machine rebuilding, equipment maintenance, and other industrial automation applications.

We assist customers with model identification, part number verification, replacement part sourcing, quotation preparation, packing confirmation, and international shipping coordination. Before quotation, customers may provide complete model numbers, order codes, product photos, nameplate information, or technical specifications for verification.

For discontinued, legacy, or difficult-to-source components, we can also help check possible replacement options based on the exact model, hardware configuration, electrical specifications, communication interface, and application requirements.

Our objective is to provide clear product identification, practical sourcing support, reliable order handling, and efficient communication for industrial automation maintenance and spare parts procurement.

Service Scope

• PLC modules, controllers, and control system components  

• Servo drives, servo motors, and motion control components

• Variable frequency drives and AC drives

• HMI operator panels and industrial displays

• Industrial sensors, pressure measurement devices, load cells, and related components

• Pneumatic valves, cylinders, fittings, and accessories

• Hydraulic pumps, valves, cylinders, and control components

• Industrial power supplies, relays, contactors, circuit breakers, cables, and connectors

• Industrial Ethernet, fieldbus, and communication modules

• Legacy and discontinued automation spare parts

• Replacement part identification and model cross-checking

Industries Served

Our products and sourcing services support a wide range of industrial applications, including:

• CNC machinery

• Packaging machinery

• Robotics and automated equipment

• Factory automation and production lines

• Water treatment systems

• Machine building and equipment rebuilding

• Industrial maintenance and repair

• OEM equipment users

• System integrators

• Maintenance companies

• Industrial distributors

Why Choose DF Automatic

Model and Part Number Verification

We check model numbers, order codes, nameplate information, and product specifications before quotation to reduce the risk of incorrect part selection.

Support for Legacy and Discontinued Parts

We assist with sourcing older automation components and checking compatible or replacement options where applicable.

Efficient Quotation Support

Customers can send individual models or complete spare parts lists for quotation and availability checking.

International Order Coordination

We support packing confirmation, shipment preparation, and international logistics coordination according to order requirements.

Flexible Procurement Support

We can handle single replacement parts, urgent maintenance requirements, and larger industrial spare parts purchase lists.

Inquiry Information

For faster product confirmation and quotation, please provide as much of the following information as possible:

• Complete model number

• Part number or order code

• Product quantity

• Product photos

• Nameplate photos

• Required condition

• Technical specifications

• Existing machine or system information

• Destination country or shipping requirements

Important Note

Product availability, condition, price, lead time, configuration, and replacement options depend on the exact model number, part number, order quantity, technical requirements, and current supply conditions.

For products with multiple hardware versions, firmware versions, electrical specifications, communication options, or regional variants, the complete nameplate and order code should be confirmed before purchase.