Allen-Bradley 1756-EN3TR ControlLogix Ethernet Module

Name: Allen-Bradley 1756-EN3TR ControlLogix Ethernet Module
Brand: Allen-Bradley
SKU: 1756-EN3TR
Price: 499.99 USD
Availability: InStock

In stock: 1 unit in Milwaukee, WI. Physically stocked and ready to ship or available for local pickup. Includes a 1-year full-function warranty.

Third-generation EtherNet/IP bridge · copper · dual-port embedded switch (DLR ring capable)

Allen-Bradley 1756-EN3TR ControlLogix EtherNet/IP bridge module – Series B (1 of 10)

Actual NJT inventory photos

Price

$499.99USD

Used units available

Request Repair Quote

Part Number	1756-EN3TR
Description	ControlLogix EtherNet/IP bridge module. In stock in used condition.
Shipping	Ships same or next business day UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Pickup	Free local pickup at 2122 N Prospect Ave. Call ahead at (414) 331-5954.
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price ($75.00) 3 years +25% of product price ($125.00) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1756-EN3TR after your purchase for a 10% core credit ($50). We also purchase old or damaged parts outright.

Replacement Options for 1756-EN3TR

Pick a condition and series below. UPS Ground shipping included.

Allen-Bradley 1756EN3TR ControlLogix Ethernet Module – Used

Allen-Bradley 1756EN3TR ControlLogix Ethernet Module – Used, second photo

Allen Bradley 1756-EN3TR ControlLogix EtherNet/IP Dual Port Module 1756EN3TR

$499.99 USDIn-stock match

Condition: Used

1 in stockView details

Variants

Part NumberConditionSeriesQtyPrice

1756EN3TR$499.99

Used · 1 in stock

1756EN3TRUsed—1$499.99 USD

Availability

1 unit in stock

Repairs

1756-EN3TR Mail-In Repair Service

Part Number Decoder

ControlLogix EtherNet/IP bridge module

1756EN3TR

1756: BulletinControlLogix: Rockwell Automation's chassis-based control platform (controllers, I/O, communication modules, power supplies and chassis).
EN: Module typeEtherNet/IP communication bridge: connects the chassis backplane to an EtherNet/IP network.
3: GenerationThird-generation EtherNet/IP bridge (10/100 Mbps; 128 TCP / 256 CIP connections, up to 128 Integrated Motion axes).
T: MediaTwisted-pair copper (RJ45).
R: TopologyRing: embedded 2-port switch supporting Device Level Ring (DLR), linear or star topologies.

Decoded from the Rockwell Automation catalog-number structure. Series and firmware revision are printed on the product label, not encoded here.

Series & Revisions

No series in stock today; request a series above.

Series notes: Logix keys on catalog number and firmware revision, not series; with the default Compatible Module keying, any series of the same catalog number is accepted in the slot.

Intended Use

Designed for EtherNet/IP networking and remote I/O applications. The bridge connects a ControlLogix chassis to distributed I/O, drives, HMIs and other controllers over Ethernet, and uplinks the rack to plant and business networks. Dual-port versions build device-level ring (DLR) topologies for fault-tolerant machine networks.

Physical Data

Weight and DimensionsWeight0.62 lb (0.28 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)

Weight	0.28 kg (0.62 lb) Typical unit weight
Dimensions (H × W × D)	145 × 35 × 145 mm (5.7 × 1.4 × 5.7 in.) Single-slot module
Shipping Weight	0.81 kg (1.78 lb) Estimated: unit weight plus box and packing material; bills as 2 lb
Shipping Box (L × W × H)	12 × 12 × 8 in. (305 × 305 × 203 mm) Smallest standard box fitting the product with 3 in. cushioning per side

Product weight and dimensions are typical manufacturer-published values and may differ by series or option. Shipping box and weight are estimates for freight planning; the packed unit may ship in a different box.

Can the 1756-EN3TR be repaired?

Yes. NJT Automation repairs the 1756-EN3TR by mail-in: diagnostic evaluation, component-level repair and a functional test, backed by a 1-year full-function warranty.

NJT managed repair. No evaluation fee; no repair, no charge. Prepaid UPS label both ways, $650 minimum, rush available. 1-year full-function warranty included, 2- and 3-year options.

Get a repair quoteor text photos and symptoms to (414) 331-5954

Compare quotes from independent repair technicians. Post your repair on RepairMode to receive competitive bids from experienced technicians. Each technician sets their own pricing and warranty.

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Common failures

Failure patterns we regularly see on ControlLogix EtherNet/IP bridge module hardware like the 1756-EN3TR:

Corrupted firmware after an interrupted ControlFLASH update: module stuck in boot
Scrolling display / IP address display blank while the module still passes traffic
Module drops all CIP connections under load and recovers only after a power cycle
Ethernet port failure: no link LED, or link flapping with a known-good cable and switch port
Solid red OK LED at power-up (module hardware fault) or module not seen in RSLinx

Related services:PLC Repair All Repair Services

Photos by NJT Automation; test videos from NJT or network repair technicians.

Still have questions?

Find answers to shipping, warranties, repairs, and more.

Frequently Asked Questions

What is the 1756-EN3TR?

The Allen-Bradley 1756-EN3TR is a ControlLogix EtherNet/IP bridge module: Third-generation EtherNet/IP bridge, copper, dual-port embedded switch (DLR ring capable).

What condition is it in?

NJT Automation currently has 1 unit of the 1756-EN3TR in stock in used condition. Each listing states its own condition and series. Used means a unit removed from service and sold without refurbishment. Cosmetic condition, any functional testing performed, and the warranty term are stated on each unit’s own listing. From the listing: This item is in good working condition with some signs of use and is fully functional. It comes with 90-day free returns and a 1 year NJT warranty.

When does this part ship?

1 unit of the 1756-EN3TR ControlLogix EtherNet/IP bridge module are on the shelf in Milwaukee, WI, priced from $499.99. Orders before 5:00 PM Central on a business day ship the same day; next-day air is available at checkout.