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Allen-Bradley ControlLogix 1756-EN3TR Dual-Port EtherNet/IP Module, 128 TCP Connections, 128 Axes | Original New

Allen-Bradley ControlLogix 1756-EN3TR Dual-Port EtherNet/IP Module, 128 TCP Connections, 128 Axes | Original New

ALLEN-BRADLEY | CONTROLLOGIX

1756-EN3TR

Dual-Port EtherNet/IP Motion Communication Module

Official description: EtherNet/IP communication module, dual port, 10/100M twisted pair, 128 TCP connections, 128 axes.

PORTS: Dual | LINK SPEED: 10/100M | TCP CONNECTIONS: 128 | MOTION AXES: 128

LEAD TIME: In stock | WARRANTY: 1 year

Email Inquiry [email protected]

WhatsApp +86 18159889985

Appurtenance:

Overview
Technical Data
Inquiry
Functions
Interfaces
Installation
Diagnostics
FAQ
Recommend Models
Recommended Products

Allen-Bradley ControlLogix 1756-EN3TR

Dual-Port EtherNet/IP Motion Communication Module for the ControlLogix platform.

PORTS
Dual

LINK SPEED
10/100M

TCP CONNECTIONS
128

MOTION AXES
128

The Rockwell Automation official cut sheet identifies catalog number 1756-EN3TR as EtherNet/IP communication module, dual port, 10/100M twisted pair, 128 TCP connections, 128 axes. Verify the complete catalog number, series or revision, installed platform and application requirements before procurement.

Technical Data

Complete model	1756-EN3TR
Brand	Allen-Bradley
Product family	1756 ControlLogix I/O Modules and Accessories
Product type	Communication Interface Module
Official description	EtherNet/IP communication module, dual port, 10/100M twisted pair, 128 TCP connections, 128 axes
Network protocol	EtherNet/IP
Network ports	Dual port
Physical media	Twisted pair
Link speed	10/100 Mbit/s
TCP connections	128
Motion axes	128
Series	A
Lifecycle status	Active
Dimensions	No numeric dimensions were stated in the verified official cut sheet or product page
Weight	Not stated in the verified official cut sheet or product page
Installation instructions	Rockwell Automation publication 1756-IN050
Standard warranty	1 year

Inquiry

CONTACT

STELLA

Email Inquiry [email protected]

WhatsApp +86 18159889985

Functions

Dual-port networking
Provides two EtherNet/IP network ports for ControlLogix communication.

Motion capacity
The exact model supports up to 128 axes according to the official cut sheet.

Connection capacity
Supports 128 TCP connections over 10/100M twisted-pair links.

ControlLogix integration
Communicates with the controller through the chassis backplane.

Interfaces

Network ports
Dual EtherNet/IP ports are provided on the exact model.

Link speed
Both network planning and connected equipment must support 10/100M twisted-pair Ethernet.

Topology planning
Use the two ports only in network arrangements supported by Rockwell Automation.

System interface
The module occupies a ControlLogix chassis slot and connects to the backplane.

Installation

Official instructions
Follow Rockwell Automation publication 1756-IN050.

Chassis placement
Install the module in a compatible ControlLogix chassis slot with power removed.

Network planning
Configure both ports, IP addressing and supported topology before commissioning.

Motion commissioning
Confirm the planned axis count, update rates and controller compatibility within the 128-axis specification.

Diagnostics

Model and series
Verify 1756-EN3TR and its series or revision against the project.

Port status
Check both physical network links and 10/100M negotiation.

Connection loading
Confirm the application does not exceed 128 TCP connections.

Motion loading
Verify the configured motion system remains within 128 axes and supported controller limits.

FAQ

Q1. How can I verify that the quoted unit is exactly 1756-EN3TR?

Require a clear nameplate photo showing 1756-EN3TR and compare it with the Rockwell Automation official cut sheet description: EtherNet/IP communication module, dual port, 10/100M twisted pair, 128 TCP connections, 128 axes. The quotation, invoice and packing label should use the same complete catalog number.

Q2. How can I distinguish a new 1756-EN3TR from a used or refurbished unit?

Ask for current, high-resolution photos of the front, side label, chassis connector and field or network interfaces. Check for insertion marks, terminal or port wear, damaged seals, residue, repainting or mismatched packaging, and require the condition in writing.

Q3. How should I check whether a supplier is legitimate and reliable for 1756-EN3TR?

Verify the legal company name, registration, physical address, corporate-domain contacts and bank beneficiary. Request traceable references and a written quotation that identifies 1756-EN3TR, declared condition, quantity and return terms.

Q4. Which specifications should an engineer confirm before purchasing 1756-EN3TR?

Confirm dual 10/100M EtherNet/IP ports, 128 TCP connections, 128-axis capacity, chassis slot, firmware and topology. Match these items with the installed ControlLogix system and current Rockwell Automation documentation.

Q5. What physical evidence should be requested before payment for 1756-EN3TR?

Request timestamped photos or video showing the exact 1756-EN3TR nameplate, series and revision, serial or date identifiers, packaging, chassis connector and all field or network interfaces. Evidence should match the offered unit.

Q6. Can a similar catalog number or suffix replace 1756-EN3TR?

Do not assume interchangeability. A different 1756 catalog number can change point count, contact type, port count, link speed, connection capacity, motion capacity or compatibility. Approve a substitute only after engineering review.

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