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Allen-Bradley 1769-L24ER-QB1B CompactLogix – Repair Service Available

Allen-Bradley 1769-L24ER-QB1B CompactLogix 5370 L2 controller, 750 KB user memory, dual EtherNet/IP ports, 8 nodes, 4 Compact I/O (1769) expansion modules. NJT Automation offers mail-in repair for the 1769-L24ER-QB1B with a 1-year warranty; replacement pricing is available on request.

Mail-in repair available now. Returned with a 1-year warranty. Replacement pricing on request.

Allen-Bradley 1769-L24ER-QB1B CompactLogix 5370 L2 controller, 750 KB – front view
Request Replacement QuoteRequest Repair QuoteEstimated $1,440.00
Part Number1769-L24ER-QB1B
Price
On Request
Previously sold for $599.99 - $899.99 USDAvailability and condition determine final quote.
DescriptionCompactLogix 5370 L2 controller, 750 KB.
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 ($129.00)
3 years
+25% of product price ($215.00)
View full warranty policy
Returns
90-day free returns. View return policy
Exchange

Send us your defective 1769-L24ER-QB1B 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

1769-L24ER-QB1B Mail-In Repair Service

Estimated: $1,440.00

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

CompactLogix 5370 L2 controller
1769L24ER8QB1B

CompactLogix 5370 L2 controller, 750 KB user memory, dual EtherNet/IP ports, 8 nodes, 4 Compact I/O (1769) expansion modules, embedded 16-in / 16-out digital I/O.

1769
BulletinCompactLogix / Compact I/O: Rockwell Automation's rack-less, DIN-rail Logix platform. 1769 controllers, I/O modules, power supplies and adapters snap together on a shared backplane bus.
L24
ControllerCompactLogix 5370 L2 controller (L24 class).
ER
CommunicationDual EtherNet/IP ports (linear / device-level-ring topologies), USB programming port, SD card slot.
750 KB
Memory size750 KB of standard user memory.
8
NetworkSupports up to 8 EtherNet/IP nodes; 4 Compact I/O (1769) expansion modules.
QB1B
Embedded I/O16 sink/source 24V DC digital inputs and 16 sourcing 24V DC digital outputs built into the controller.
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 DimensionsWeight1.46 lb (0.66 kg)
Weight0.66 kg (1.46 lb)
Typical unit weight, CompactLogix 5370 controller; 1769-L24ER-QB1B 0.63 kg
Shipping Weight1.39 kg (3.08 lb)
Estimated: unit weight plus box and packing material; bills as 4 lb
Shipping Box (L × W × H)12 × 12 × 12 in. (305 × 305 × 305 mm)
Most common box recorded for this catalog number
Product weight 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.

Alternate Part Numbers

1769L24ERQB1B
CategoryCompactLogix
Part Number1769-L24ER-QB1B
ManufacturerAllen-Bradley

Previously sold 1769-L24ER-QB1B

3 sold

NJT Automation has supplied and shipped 3 1769-L24ER-QB1B CompactLogix 5370 L2 controllers since 2024; request a quote and we will source another from our supplier network.

Sold
3 since 2024
Price range
$600 – $900
By condition
Used (3)$600 – $900
Series
A × 3

Used 1769-L24ER-QB1B CompactLogix 5370 L2 controllers have sold for $600 – $900.

Allen-Bradley 1769-L24ER-QB1B Used - previously sold by NJT AutomationSold

Allen Bradley 1769-L24ER-QB1B Ser A CompactLogix Controller

$899.99 USD

Used

Request Quote
Allen-Bradley 1769-L24ER-QB1B Used - previously sold by NJT AutomationSold

Allen Bradley 1769-L24ER-QB1B /A CompactLogix ENet 750KB D I/O Controller + ECR

$859.99 USD

Used

Request Quote
Allen-Bradley 1769-L24ER-QB1B/A Used - previously sold by NJT AutomationSold

Allen Bradley 1769-L24ER-QB1B Ser A CompactLogix 750kB Controller

$599.99 USD

Used

Request Quote

Can the 1769-L24ER-QB1B be repaired?

Yes. NJT Automation offers mail-in repair for the 1769-L24ER-QB1B, 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 1769-L24ER-QB1B failures

Failure patterns we regularly see on CompactLogix 5370 L2 controller hardware like the 1769-L24ER-QB1B:

  • Program lost on power cycle: battery (1769-BA) depleted, BAT LED red or flashing
  • Solid red OK LED (nonrecoverable major fault) at power-up
  • Embedded Ethernet port failure or dropped connections on -E / -ER controllers
  • CompactFlash or SD card corruption: stored project will not load
  • Channel 0 RS-232 port damaged by a hot-plugged programming cable

Repair or replace?

ReplaceReplace the 1769-L24ER-QB1B if it will not boot, shows a solid red fault light, or has lost its program. Another CompactLogix 5370 L2 controller takes the same program: download it, match the firmware, and the line is running again. Order the exact 1769-L24ER-QB1B. The catalog number sets the 750 KB memory, and a different suffix changes it. We source the 1769-L24ER-QB1B on request, so weigh that lead time against a repair turnaround.
RepairRepair the 1769-L24ER-QB1B when the fault is in the power section, a port or the status display rather than the processor core, or when the controller carries a firmware revision or validated project you cannot easily re-flash onto a different unit. The two 1769-L24ER-QB1B symptoms we see most often are “Program lost on power cycle” and “Solid red OK LED (nonrecoverable major fault) at power-up”. If a replacement is already installed, repairing the failed 1769-L24ER-QB1B gives you a tested spare on the shelf for the next failure. Our estimated $1,440.00 repair of the 1769-L24ER-QB1B includes full-function testing and 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 1769-L24ER-QB1B is a CompactLogix 5370 L2 controller, 750 KB user memory, dual EtherNet/IP ports, 8 nodes, 4 Compact I/O (1769) expansion modules, embedded 16-in / 16-out digital I/O.
The 1769-L24ER-QB1B 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, 3 1769-L24ER-QB1B CompactLogix 5370 L2 controllers have sold since 2024 for $600 – $900. None are in stock at the moment; request a quote for current pricing, or have your CompactLogix 5370 L2 controller repaired for an estimated $1,440.
This 1769-L24ER-QB1B 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 1769-L24ER-QB1B CompactLogix 5370 L2 controller. 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 1769-L24ER-QB1B has been sourced and is ready, free local pickup is available at NJT Automation, 2122 N Prospect Ave, Milwaukee, WI, during business hours.
Dual EtherNet/IP ports (linear / device-level-ring topologies), USB programming port, SD card slot.
750 KB of standard user memory.
NJT Automation

NJTAutomation

Industrial Electronics

Supply & Repair, Milwaukee WI

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