1756-EN2TR ControlLogix EtherNet/IP module

1756-EN2TR links ControlLogix data to EtherNet/IP through dual copper ports.

System role and ports

Rebuilt from individual evidence

Unknown: verification boundary

Rockwell Automation identifies 1756-EN2TR as a ControlLogix EtherNet/IP communication module with dual ports and Device Level Ring support.

It links the ControlLogix chassis to the EtherNet/IP network at the network edge through two 10/100 Mbps copper ports, with up to 128 TCP connections documented.

Unknown: network topology, firmware state and condition of an individual 1756-EN2TR unit.

Exact reference: 1756-EN2TR
Category: PLC / CPU
Evidence checked: 2026-09-11

System role

This section explains what the product does and where it acts in the surrounding system.

Function: Transmits ControlLogix data over EtherNet/IP through dual 10/100 Mbps copper ports.
System position: Links a ControlLogix chassis to the EtherNet/IP network at the network edge.
Upstream / inputs: ControlLogix chassis data enters the communication module.
Downstream / outputs: EtherNet/IP traffic leaves through the dual copper network ports.
Limitations: Unknown: network topology, firmware state and condition of an individual 1756-EN2TR unit.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

Rockwell Automation identifies 1756-EN2TR as a ControlLogix EtherNet/IP communication module with dual ports and Device Level Ring support.
Confidence: high
- www.rockwellautomation.com — retrieved 2026-09-11; high confidence
The product page documents two 10/100 Mbps copper ports and support for up to 128 TCP connections.
Confidence: high
- www.rockwellautomation.com — retrieved 2026-09-11; high confidence

Inferences

The module links a ControlLogix chassis to an EtherNet/IP network at the network edge.
Confidence: high
Rationale: Rockwell documents the chassis communication module, dual copper ports and EtherNet/IP support.
- www.rockwellautomation.com — retrieved 2026-09-11; high confidence

Unknowns

Unknown: network topology, firmware state and condition of an individual 1756-EN2TR unit.
Confidence: low
Missing evidence: The product page does not provide a site topology, project file or individual unit inspection.

System position diagram

1756-EN2TR links a ControlLogix chassis with an EtherNet/IP network. — The module carries ControlLogix chassis data to and from the EtherNet/IP network.

View Mermaid source

flowchart LR
 chassis["ControlLogix chassis"] --> en["1756-EN2TR"]
 en <--> net["EtherNet/IP network"]

View diagram labels

Nodes: ControlLogix chassis; 1756-EN2TR; EtherNet/IP network
Edges: Chassis data; EtherNet/IP traffic

Next action

The Rockwell evidence supports publishing this exact reference as a dual-port ControlLogix EtherNet/IP module.

Verify the network topology, firmware, ring design and chassis configuration before commissioning.

Request help with this reference

Provide the exact reference, machine context, and observed symptom so the next review can stay evidence-based.

Submission is unavailable until durable storage is verified.

Reference or description *Recovery mode *Country *RegionEmail *Phone

I’m unsure of the exact reference or route; keep my description for human qualification.

Add context only if useful

ManufacturerMachine or lineComponent typeUrgencyProduction impactQuantityAcceptable conditionNeed byPreferred contact

Technical context

What is known so far?

Optional updatesNotify me when the supplier price changesSubscribe to the ardkor.org newsletter

This may be safety-sensitive or emergency-related; hold it for human handling.Allow anonymous landing and source categories to be saved with this request for analytics. This is optional and separate from routing.

Recipient and data disclosure

Named recipient: Ardkor human-qualification queue (internal local preview). No partner delivery is enabled here.

Data retained for this review: reference, selected route, location, technical context, contact details, consent state, and any accepted private attachment.

Response expectation: none is promised. If external routing is enabled later, the partner name, disclosed fields, and response expectation must be shown and accepted again.

Withdrawal and deletion: use the private request controls from the receipt to withdraw further processing or request access/deletion. The request remains recorded until the relevant Ardkor systems and any recipient confirm completion.

External routing consent: I separately authorize Ardkor to use this request for human qualification in the named internal queue. No external partner is authorized by this checkbox.

Read the privacy information before sending. For corrections, access, or deletion help, use the contact page or email reference@ardkor.org; mailbox delivery and attendance have not been verified.

This routing state is separate from watch, marketing, payment, and analytics choices. If no capable service match is found, the request remains a human-qualification lead and is never presented as provider acceptance. Ardkor is not an emergency or safety service and submission does not guarantee availability, price, repair, sourcing, or response.