1756-CNB ControlLogix ControlNet Communication Module

Product Overview

The 1756-CNB is a ControlLogix ControlNet communication module used in legacy industrial control networks. It supports deterministic communication between ControlLogix controllers, I/O systems, and connected industrial devices in plants that still operate with ControlNet infrastructure.

Main Features

• ControlNet communication module for ControlLogix systems
• Supports legacy deterministic industrial network communication
• Used for controller, I/O, and plant network integration
• Suitable for maintenance replacement in aging ControlNet systems
• Useful for legacy system support and migration planning

Technical Specifications

Compatible System and Chassis Use

The 1756-CNB is used in ControlLogix chassis systems requiring ControlNet communication. Final compatibility should be confirmed according to the installed controller, chassis, firmware level, network node configuration, and existing ControlNet layout.

Industrial Applications

This module is used in process control systems, production lines, material handling systems, packaging machinery, and other industrial installations where ControlNet communication remains part of the control architecture.

Maintenance and Replacement Notes

The 1756-CNB is often needed for legacy ControlNet maintenance. It is suitable for replacement projects where network communication loss may cause production downtime, and it can support continued operation while a migration plan is prepared.

Related Models

1756-CNBR, 1756-CN2, 1756-CN2R, 1756-DHRIO, 1756-ENBT

Inquiry and Supply Notes

This model is suitable for industrial communication spare parts replacement and legacy ControlNet system support. Please confirm the installed network configuration before replacement.

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.