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The Allen-Bradley 1756-ENBT is a high-performance communication bridge module designed for the ControlLogix platform. It provides seamless connectivity to EtherNet/IP networks, allowing for efficient data exchange and control across industrial automation systems. This module supports standard 10/100 Mbps communication rates, ensuring compatibility with a wide range of industrial network infrastructures.

Features

  • Supports EtherNet/IP communication protocols for robust industrial networking.
  • Provides 10/100 Mbps data transfer rates for high-speed connectivity.
  • Designed for integration with the ControlLogix backplane.
  • Supports up to 128 Logix connections for complex system architectures.
  • Optimized for reliable operation in demanding industrial environments.

Applications

This communication module is ideal for distributed control systems, remote I/O management, and HMI-to-PLC communication. It is commonly utilized in manufacturing, water treatment, and process automation facilities to bridge the gap between control hardware and Ethernet-based supervisory or enterprise networks.

Technical Specifications

Model 1756-ENBT
Communication Rate 10/100 Mbps
Current Draw (5.1V DC) 700 mA
Current Draw (24V DC) 3 mA
Insulation Voltage 30V Continuous
Connections Up to 128 Logix connections

Installation Guidelines

  • Ensure the ControlLogix chassis is powered down before inserting or removing the module to prevent electrical damage.
  • Align the module carefully with the chassis slot guides before seating it fully into the backplane.
  • Use shielded twisted-pair Ethernet cabling to minimize EMI interference in high-noise environments.
  • Maintain proper grounding of the chassis to ensure signal integrity and protection against surges.
  • Verify that the module is securely locked into the chassis using the top and bottom latches.

FAQ

What is the primary function of the 1756-ENBT?
The 1756-ENBT acts as a bridge, allowing a ControlLogix controller to communicate with other devices over an EtherNet/IP network.

Is this module compatible with all ControlLogix chassis?
Yes, the 1756-ENBT is designed to mount into any standard ControlLogix I/O chassis.

What is the current draw for this module?
The module draws 700 mA at 5.1V DC and 3 mA at 24V DC from the backplane.

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