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Allen-Bradley 1756-ENBT ControlLogix Ethernet Module

Allen-Bradley 1756-ENBT ControlLogix EtherNet/IP bridge (10/100 copper, 1st generation), EtherNet/IP bridge module, 10/100 Mbps copper (single port). NJT Automation sources the 1756-ENBT 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-ENBT ControlLogix EtherNet/IP bridge (10/100 copper, 1st generation) – front view
Request Replacement QuoteRequest Repair Quote
Part Number1756-ENBT
Price
On Request
Previously sold for $129.99 - $1,199.99 USDAvailability and condition determine final quote.
DescriptionControlLogix EtherNet/IP bridge (10/100 copper, 1st generation).
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 ($19.50)
3 years
+25% of product price ($32.50)
View full warranty policy
Returns
90-day free returns. View return policy
Exchange

Send us your defective 1756-ENBT after your purchase for a 10% core credit. We also purchase old or damaged parts outright.

Availability
Available Level 1

This part is available through our Level 1 supplier network. Request a quote to confirm quantity, price, and next-day shipping options.

Inventory Level 1 RFQ

Level 1 parts come from vetted US suppliers we have worked with for years. Each unit is checked before it ships, so counterfeits, repackaged items sold as new, and worn-out equipment do not reach you. Every part carries the same NJT warranty and return policy as our own stock.

Request QuoteLearn more about Inventory Levels
Repairs

1756-ENBT Mail-In Repair Service

How the Process Works:

  1. Submit Your RFQ: Complete the request-for-quote (RFQ) form with your exact requirements.
  2. Receive a Quote: We respond ASAP - within 1 hour during business hours.
  3. Approve and Pay: Agree to the quoted price, and we will issue an invoice payable via credit card or your preferred method.
  4. Direct Shipping: Our normal shipping time is 3-5 business days, during which we thoroughly inspect and certify items to meet our high standards. If you request next-day air delivery, the item will be sent directly to you and arrive the following business day. Please note: These items are NOT available for local pickup at NJT Automation's location.

What We Offer

We source genuine parts from trusted U.S. channels and stand behind what we sell.
  • Our network has millions of parts ready to be delivered now.
  • Complete Transparency: Clear information on item availability.
  • Well-vetted components from trusted suppliers sourced from the USA.
  • Technical Support: Assistance, troubleshooting and hardware repairs.
  • Minimal Markup: The best sourcing service at a minimal cost.
  • Quick Delivery: Fast access to the parts you need to get your machines back up and running.
  • Dropship available • No branding on packaging

Part Number Decoder

ControlLogix EtherNet/IP bridge (10/100 copper, 1st generation)
1756ENBT

EtherNet/IP bridge module, 10/100 Mbps copper (single port); the original ControlLogix Ethernet bridge (64 TCP / 128 CIP connections).

1756
BulletinControlLogix: Rockwell Automation's chassis-based control platform (controllers, I/O, communication modules, power supplies and chassis).
ENBT
Module codeEtherNet/IP bridge module, 10/100 Mbps copper (single port); the original ControlLogix Ethernet bridge (64 TCP / 128 CIP connections).
Decoded from the Rockwell Automation catalog-number structure. Series and firmware revision are printed on the product label, not encoded here.

Physical Data

Weight and DimensionsWeight0.62 lb (0.28 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)
Weight0.28 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 Weight0.81 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.

Datasheet

Datasheet available for download
Generated from product specifications; not an official Allen-Bradley datasheet. For an official datasheet, contact Allen-Bradley or an authorized distributor.

Similar Part Numbers

  • 1756-DHRIO Module code: Data Highway Plus / Remote I/O module
  • 1756-HIST2G Module code: FactoryTalk Historian Machine Edition module with 2 GB
  • 1756-OF8I Module code: 8-channel isolated analog output module
  • 1756-RM2 Module code: Redundancy module, second generation

Allen Bradley Information

Technical Specifications8 parameters from manufacturer-published specifications
Module typeEtherNet/IP communication bridge
Network speed10/100 Mbps
Ethernet ports1 × RJ45
Connections64 TCP/IP; 128 CIP
Backplane current700 mA @ 5.1V DC
Power dissipation3.7 W
Chassis slots1
Recommended replacement1756-EN2T or 1756-EN4TR
Typical manufacturer-published values for this catalog number; confirm against the current manufacturer documentation before specifying.

Alternate Part Numbers

1756ENBT
CategoryControlLogix
Part Number1756-ENBT
ManufacturerAllen-Bradley

Previously sold 1756-ENBT

6 sold

NJT Automation has supplied and shipped 6 1756-ENBT ControlLogix EtherNet/IP bridges since 2024; request a quote and we will source another from our supplier network.

Sold
6 since 2024
Price range
$130 – $1,200, median $370
By condition
Unused surplus (5)$350 – $1,200
Series
A × 6

Unused surplus 1756-ENBT ControlLogix EtherNet/IP bridges have sold for $350 – $1,200, typically around $390.

Allen-Bradley 1756-ENBT Unused surplus (new old stock) - previously sold by NJT AutomationSold

Allen Bradley 1756-ENBT Ser A Ethernet 10-100M Interface Module - Sealed Surplus

$1,199.99 USD

Unused surplus (new old stock)

Request Quote
Allen-Bradley 1756-ENBT Unused surplus (new old stock) - previously sold by NJT AutomationSold

2021 Allen-Bradley 1756-ENBT /A SER A EtherNet/IP Module - Sealed Surplus

$399.99 USD

Unused surplus (new old stock)

Request Quote
Allen-Bradley 1756-ENBT Unused surplus (new old stock) - previously sold by NJT AutomationSold

Allen Bradley 1756-ENBT /A EtherNet/IP ControlLogix Module - Sealed Surplus

$389.99 USD

Unused surplus (new old stock)

Request Quote
Allen-Bradley 1756-ENBT Unused surplus (new old stock) - previously sold by NJT AutomationSold

Allen Bradley 1756-ENBT Ser A ControlLogix EtherNet/IP Module PLC - Open Box

$349.99 USD

Unused surplus (new old stock)

Request Quote

Can the 1756-ENBT be repaired?

Yes. NJT Automation offers mail-in repair for the 1756-ENBT, including diagnostic evaluation, component-level repair, and functional testing.

NJT Managed Repair

One vendor. One warranty. NJT manages the entire process.

  • 1-year full-function NJT warranty, with 2- and 3-year options available
  • Rush service available for production-critical repairs
  • No evaluation or diagnostic charges
  • No repair, no charge
  • "Unrepairable" is not an option
  • Pre-paid UPS shipping label provided for sending your unit in
  • $650 minimum repair charge, shipping included both ways
Get an NJT Repair Quote

Looking for another option? For lower-cost repairs or if you prefer to work directly with an independent repair specialist, compare bids through RepairMode. RepairMode providers operate independently and set their own pricing and warranty terms.

Find a PLC repair specialiston RepairMode.com ↗

Common 1756-ENBT failures

Failure patterns we regularly see on ControlLogix EtherNet/IP bridge (10/100 copper, 1st generation) hardware like the 1756-ENBT:

  • 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
  • Overheating when the module runs near its connection limit in a sealed enclosure

Repair or replace?

ReplaceA ControlLogix EtherNet/IP bridge (10/100 copper, 1st generation) holds little more than a network address, so a replacement 1756-ENBT drops in with almost no setup. Replace it when the network is down or the module is physically damaged. The 1756-ENBT is not shelf stock, so sourcing time is part of the repair-or-replace decision.
RepairRepair makes sense on the 1756-ENBT when the failure is a connector, port or power-section fault on an otherwise sound board, or when you have several failing modules and want them returned as tested spares. Most 1756-ENBT units reach our bench with one of two symptoms: “Ethernet port failure” or “Overheating”. Already swapped it out? Repairing the failed 1756-ENBT turns it into a tested spare on the shelf for the next failure. Repaired 1756-ENBT units are function-tested before return and carry a 1-year warranty.

Request a Repair Quote

Text photos of the faulty unit and the symptoms to (414) 331-5954.

Start Your Repair Today

All product photos were taken by NJT Automation. Test videos originated from either NJT Automation internally or from repair technicians within our network.

Still have questions?

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

The Allen-Bradley 1756-ENBT is an EtherNet/IP bridge module, 10/100 Mbps copper (single port); the original ControlLogix Ethernet bridge (64 TCP / 128 CIP connections).
The 1756-ENBT is available 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.
At NJT Automation, 6 1756-ENBT ControlLogix EtherNet/IP bridges have sold since 2024 for $130 – $1,200, with a median of $370. None are in stock at the moment; request a quote for current pricing.
This 1756-ENBT is sourced on request, so sourcing and quote timelines apply. Request a quote and we'll confirm availability and lead time. Many parts can be sourced within a few business days through our Level 1 supplier network.
Yes. UPS Next Day Air is available at checkout for the 1756-ENBT ControlLogix EtherNet/IP bridge (10/100 copper, 1st generation). Place your order before 5:00 PM Central on a business day and your in-stock item ships the same day for next-business-day delivery.
Yes. Once your 1756-ENBT has been sourced and is ready, free local pickup is available at NJT Automation, 2122 N Prospect Ave, Milwaukee, WI, during business hours.
NJT Automation

NJTAutomation

Industrial Electronics

Supply & Repair, Milwaukee WI

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Product Condition & Warranty

Products sold by NJT Automation may be surplus inventory, discontinued models, older series, or units with earlier manufacturing date codes than those currently available from the OEM or its authorized distribution network. As NJT Automation is not an authorized distributor, manufacturer warranties, support programs, and other OEM services may not apply. Any warranty provided is solely that of NJT Automation, where applicable.

Firmware & Software Licensing

Certain programmable logic controllers (PLCs), drives, HMIs, and other electronic products may require firmware to operate. While some products may include firmware, NJT Automation makes no representations or warranties regarding whether firmware is installed, the firmware version or revision level, its compatibility with your application, or its licensing status.

NJT Automation does not provide, obtain, transfer, or license firmware on behalf of customers. We make no representation regarding your ability or legal right to obtain, download, install, or use firmware from the OEM, its authorized distributors, or any other source. It is the customer's sole responsibility to ensure compliance with all applicable End User License Agreements (EULAs), software licenses, intellectual property rights, and other terms governing the acquisition, installation, and use of firmware.

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