Allen-Bradley | 1756-DHRIO| ControlLogix

Product Description: Allen-Bradley 1756-DHRIO

The Allen-Bradley 1756-DHRIO is a dual-channel communication module for ControlLogix systems that enables connectivity to both Data Highway Plus (DH+) and Remote I/O (RIO) networks. It allows ControlLogix controllers to interface with legacy PLC systems such as PLC-5 and SLC 500, facilitating smooth integration and phased migration to modern automation platforms.

Key Features

• Two independent channels configurable for either DH+ or RIO
• Enables messaging between ControlLogix and legacy Allen-Bradley PLCs over DH+
• Operates as a scanner on RIO networks for remote I/O communication
• Supports block transfers and discrete I/O
• Configurable via RSLogix 5000 or Studio 5000 software
• Baud rate support: 57.6 kbps, 115.2 kbps, and 230.4 kbps
• Backplane-compatible module for installation in ControlLogix chassis

Technical Specifications

• Number of Channels: 2
• Supported Protocols: Data Highway Plus (DH+), Remote I/O (RIO)
• Baud Rates: 57.6 kbps, 115.2 kbps, 230.4 kbps
• Maximum Cable Length:
  • 57.6 kbps: 3048 meters
• Recommended Cable Type: Belden 9463 or equivalent
• Backplane Current: 1.7 A at 5.1V DC
• Operating Temperature: 0 to 60°C
• Storage Temperature: -40 to 85°C
• Relative Humidity: 5% to 95% non-condensing
• Certifications: UL, CE, CSA, ATEX

Application Areas

• Integration of legacy systems with modern ControlLogix architectures
• Migration projects requiring communication with existing PLC-5 or SLC 500 networks
• Industrial plants using DH+ and RIO for distributed I/O
• Data exchange between ControlLogix and older DH+/RIO networks

Advantages

• Supports legacy equipment without hardware replacement
• Reduces cost and downtime in upgrade projects
• Dual-channel flexibility for mixed network environments
• Seamless configuration within Rockwell software environments
• Reliable performance in demanding industrial settings