Allen-Bradley 1769-L23E-QB1B CompactLogix Processor

Name: Allen-Bradley 1769-L23E-QB1B CompactLogix Processor
Brand: Allen-Bradley
SKU: 1769-L23E-QB1B
Price: 299.99 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.

CompactLogix L23E controller · 512 KB user memory · EtherNet/IP port plus RS-232 port · 2 Compact I/O expansion modules · embedded 16-in / 16-out digital I/O

Allen-Bradley 1769-L23E-QB1B CompactLogix controller, 512 KB (1 of 10)

Actual NJT inventory photos

Price

$299.99USD

Used units available

Request Repair Quote

Part Number	1769-L23E-QB1B
Description	CompactLogix controller, 512 KB. 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 ($45.00) 3 years +25% of product price ($75.00) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1769-L23E-QB1B after your purchase for a 10% core credit ($30). We also purchase old or damaged parts outright.

Replacement Options for 1769-L23E-QB1B

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

Allen-Bradley 1769-L23E-QB1B CompactLogix Processor – Used

Allen-Bradley 1769-L23E-QB1B CompactLogix Processor – Used, second photo

Allen Bradley 1769-L23E-QB1B CompactLogix EtherNet Processor 24VDC 1769L23EQB1B

$299.99 USDIn-stock match

Condition: Used

1 in stockView details

Variants

Part NumberConditionSeriesQtyPrice

1769-L23E-QB1B$299.99

Used · 1 in stock

1769-L23E-QB1BUsed—1$299.99 USD

Availability

1 unit in stock

Part Number Decoder

CompactLogix controller

1769L23EEQB1B

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.
L23E: ControllerCompactLogix L23E controller (first-generation CompactLogix, CompactFlash memory card).
512 KB: Memory size512 KB of user memory.
E: CommunicationEtherNet/IP port plus RS-232 port; 2 Compact I/O 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.

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

Intended for machine-level control applications. CompactLogix controllers run packaging machines, palletizers, conveyors, material handling, small process skids and OEM equipment where a mid-size Logix controller with local I/O fits in the machine panel and programs in Studio 5000 like the rest of the plant.

Migration Path

Rockwell Automation has discontinued the first-generation 1769-L2x and L3x CompactLogix controllers. Published successor for the CompactLogix L2x / L3x: 1769-L24ER-QB1B (CompactLogix 5370).

The 1769 Compact I/O and 1769-PA/PB power supplies carry over unchanged to a CompactLogix 5370 L3; the controller sits in the same left-most position on the same bus.
Open the project in Studio 5000 (RSLogix 5000 v20 also supports the L3xER), change the controller type, verify and download. The L3xER has dual EtherNet/IP ports with Device Level Ring, an SD card (1784-SD1) in place of CompactFlash and no RS-232 port, so serial devices move to Ethernet.
To move to Compact 5000 (5069) I/O instead, choose a CompactLogix 5380 and plan a re-termination; 1769 I/O does not mount on the 5380.

A like-for-like replacement or a repair keeps the existing program, wiring and panel layout; a migration is a project. Both are listed on this page so the choice can be made on lead time and budget.

Physical Data

Weight and DimensionsWeight2.69 lb (1.22 kg)

Weight	1.22 kg (2.69 lb) Typical unit weight, packaged controller with embedded I/O; 1769-L23E-QB1B 0.91 kg
Shipping Weight	2.18 kg (4.80 lb) Estimated: unit weight plus box and packing material; bills as 5 lb
Shipping Box (L × W × H)	14 × 14 × 12 in. (356 × 356 × 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.

Allen Bradley Information

Technical SpecificationsLifecycle status

Lifecycle	Discontinued Verify current status with the manufacturer.

Still have questions?

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

Frequently Asked Questions

What is the 1769-L23E-QB1B?

The Allen-Bradley 1769-L23E-QB1B is a CompactLogix L23E controller, 512 KB user memory, EtherNet/IP port plus RS-232 port, 2 Compact I/O expansion modules, embedded 16-in / 16-out digital I/O.

What condition is it in?

NJT Automation currently has 1 unit of the 1769-L23E-QB1B 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.

How much does it cost?

At NJT Automation, 2 1769-L23E-QB1B CompactLogix controllers have sold in 2024 for $570 – $700. Right now 1 unit is in stock at $300, depending on condition and series.

When does this part ship?

1 unit of the 1769-L23E-QB1B CompactLogix controller are on the shelf in Milwaukee, WI, priced from $299.99. Orders before 5:00 PM Central on a business day ship the same day; next-day air is available at checkout.

What communication ports does it have?

EtherNet/IP port plus RS-232 port; 2 Compact I/O expansion modules.

How much memory does it have?

512 KB of user memory.