Allen-Bradley 1756-EN2TK ControlLogix Ethernet Module

Allen-Bradley 1756-EN2TK ControlLogix EtherNet/IP bridge module, Second-generation EtherNet/IP bridge, copper, single port, conformal-coated. NJT Automation sources the 1756-EN2TK on request; send the part number for a replacement or repair quote.

Quote required. Request a quote below for pricing and delivery.

Allen-Bradley 1756-EN2TK ControlLogix EtherNet/IP bridge module – Series D (1 of 3)

Actual NJT inventory photos

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Part Number	1756-EN2TK
Price	On Request Availability and condition determine final quote.
Description	ControlLogix EtherNet/IP bridge module.
Shipping	UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price 3 years +25% of product price View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1756-EN2TK after your purchase for a 10% core credit. We also purchase old or damaged parts outright.

Availability

Sourced on request

We do not have a 1756-EN2TK on the shelf right now. We can source one through our supplier network; request a quote and we confirm availability, price and lead time before you commit.

Sourcing

Sourced through our Level 1 network of vetted US suppliers. Each unit is checked before it ships and carries the same NJT warranty and return policy as our own stock. Quotes within one hour during business hours; typical delivery 3–5 business days, next-day air available. Sourced parts are not available for local pickup.

Request Quote How Level 1 sourcing works

Repairs

1756-EN2TK Mail-In Repair Service

Part Number Decoder

ControlLogix EtherNet/IP bridge module

1756EN2TK

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.
2: GenerationSecond-generation EtherNet/IP bridge (10/100 Mbps; 128 TCP / 256 CIP connections, up to 8 Integrated Motion axes).
T: MediaTwisted-pair copper (RJ45).
K: CoatingConformal coated for corrosive / high-humidity atmospheres.

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

Intended Use

Built 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. Conformal coating suits corrosive or high-humidity atmospheres (ANSI/ISA 71.04 G3), such as pulp and paper, wastewater, chemical and coastal sites.

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.

Allen Bradley Information

Technical SpecificationsLifecycle status

Lifecycle	Active Verify current status with the manufacturer.

Can the 1756-EN2TK be repaired?

Yes. NJT Automation repairs the 1756-EN2TK 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-EN2TK:

Module drops all CIP connections under load and recovers only after a power cycle
Scrolling display / IP address display blank while the module still passes traffic
Corrupted firmware after an interrupted ControlFLASH update: module stuck in boot
Overheating when the module runs near its connection limit in a sealed enclosure
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?

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Frequently Asked Questions

What is the 1756-EN2TK?

The Allen-Bradley 1756-EN2TK is a ControlLogix EtherNet/IP bridge module: Second-generation EtherNet/IP bridge, copper, single port, conformal-coated.

What condition is it in?

The 1756-EN2TK may be available on request in Unused surplus / Refurbished / Used condition. We can quote this part in unused surplus, refurbished, or used condition depending on availability and your preference. Specify your requirement in the RFQ.

When does this part ship?

The 1756-EN2TK is sourced on request. Request a quote and we'll confirm availability and lead time, typically a few business days.