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                    • A-B 1756-RIO ControlLogix Remote I/O Communication Module

                      The Allen-Bradley 1756-RIO is a Remote I/O (RIO) communication module for the ControlLogix platform. It can operate as a scanner or adapter, enabling communication between ControlLogix systems and compatible remote I/O devices over a Remote I/O network.

                      

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                      Key Technical Specifications

                      Parameter	Specification
                      Brand	Allen-Bradley (A-B)
                      Model	1756-RIO
                      Product Type	Remote I/O Communication Module
                      Product Family	ControlLogix
                      Communication Protocol	Remote I/O (RIO)
                      Number of RIO Channels	1
                      Operating Modes	Scanner or Adapter
                      Maximum Physical Racks	32 (addresses 0–76 octal)
                      Maximum Scheduled I/O Connections	10
                      Backplane Current at 5.1 V DC	450 mA
                      Backplane Current at 24 V DC	5 mA
                      Power Dissipation	2.5 W
                      Thermal Dissipation	8.5 BTU/hr
                      Isolation	50 V continuous, basic insulation
                      Mounting	ControlLogix 1756 chassis
                      Enclosure Type	Open style

                      

                      Rockwell Automation

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                      Features and Advantages

                      • Supports scanner and adapter operating modes for flexible network integration.

                      • Connects ControlLogix systems with compatible remote I/O equipment.

                      • Supports communication with legacy PLC-5, 1791, 1794, and other compatible RIO devices.

                      • Provides diagnostic and configuration options through compatible Rockwell Automation software.

                      • Designed for integration into a ControlLogix chassis.

                      Typical Applications

                      • Legacy remote I/O network integration

                      • PLC-5 system migration projects

                      • Industrial production and process-control systems

                      • Distributed I/O communication

                      • Maintenance of existing ControlLogix installations

                      Important Notes

                      • Discontinued: Rockwell Automation lists the 1756-RIO as discontinued effective December 31, 2025, with no planned direct replacement.

                        

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                      • A compatible ControlLogix chassis and controller configuration are required.

                      • Verify scanner/adapter mode, firmware revision, and existing RIO network compatibility before ordering.

• • • • • • • .The structure and details of the product：

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