The Allen-Bradley 1756-EWEB, also cataloged as the 1756EWEB EtherNet/IP Web Server Module, operates as a dedicated hardware component for embedded web communication and Logix data access within ControlLogix EtherNet/IP networks.

Model Configuration Details

The 1756-EWEB is a ControlLogix communication module designed to provide Ethernet web server functions and Class 3 messaging communication. The module enables browser-based access features and Ethernet connectivity between Logix controllers and external network devices.

Hardware Specifications

ControlLogix EtherNet/IP Communication Characteristics

The 1756-EWEB integrates into the ControlLogix backplane architecture and provides Ethernet-based communication services for Logix controller systems. The module supports Class 3 messaging functions and maintains communication with connected Ethernet devices through the EtherNet/IP protocol.

The module supports up to 128 Logix connections and operates through a 10/100 Mbps Ethernet interface. Network behavior depends on the configured ControlLogix architecture, controller firmware compatibility, and Ethernet infrastructure design.

For Allen-Bradley industrial control systems, firmware flash compatibility and backplane bus communication parameters must be verified during system upgrades. Proper module revision matching ensures communication consistency between the Ethernet interface and ControlLogix controller platform.

Ordering Information

• 1 x Allen-Bradley 1756-EWEB ControlLogix EtherNet/IP Web Server Module
• 1 x Factory-installed module assembly
• 1 x Ethernet communication interface
• 1 x Product identification label

Field Installation Guidelines

Chassis Installation

• Install the module into any compatible ControlLogix chassis slot.
• Confirm available backplane power capacity before installation.
• Verify controller and communication module firmware compatibility.

Ethernet Connection

• Connect the module using suitable industrial Ethernet cabling.
• Route communication cables separately from high-voltage power conductors.
• Maintain correct grounding and shielding practices for industrial Ethernet networks.

System Configuration

• Configure Ethernet parameters through the applicable ControlLogix programming environment.
• Verify IP addressing and network communication settings before operation.
• Check diagnostic information after installation to confirm communication status.

Frequently Asked Questions

• What is the primary function of the 1756-EWEB module?

The module provides Ethernet web server capability and Class 3 messaging communication within a ControlLogix EtherNet/IP system.

• Is the 1756-EWEB a ControlLogix processor?

No. The module is a communication interface device installed in a ControlLogix chassis.

• What Ethernet speed does the module support?

The 1756-EWEB supports 10/100 Mbps Ethernet communication through its EtherNet/IP interface.

• How many Logix connections are supported?

The module supports up to 128 Logix connections for configured communication services.

• What is the backplane current requirement?

The module requires 700 mA at 5.1 VDC and 3 mA at 24 VDC according to the specifications provided.

• Can the module be installed in any ControlLogix slot?

The module is specified for installation in any available compatible ControlLogix chassis slot.

• Does the module support Class 1 I/O communication?

No. The module specification indicates support for Class 3 messaging only.

• What should be checked before replacing the module?

Verify chassis compatibility, firmware revision, network configuration, and controller communication settings before replacement.