Allen-Bradley 1756-L64 ControlLogix Processor 16 MB

Allen-Bradley 1756-L64 16 MB ControlLogix 5560 controller. NJT Automation sources the 1756-L64 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-L64 ControlLogix 5560 controller, 16 MB – front view

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Part Number	1756-L64
Price	On Request Previously sold for $199.99 USDAvailability and condition determine final quote.
Description	ControlLogix 5560 controller, 16 MB.
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 ($30.00) 3 years +25% of product price ($50.00) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1756-L64 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-L64 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-L64 Mail-In Repair Service

Part Number Decoder

ControlLogix 5560 controller

1756L64

16 MB ControlLogix 5560 controller.

1756: BulletinControlLogix: Rockwell Automation's chassis-based control platform (controllers, I/O, communication modules, power supplies and chassis).
L: Module typeLogix controller (CPU module).
6: GenerationControlLogix 5560: Logix5560 series (RSLogix 5000, v20 and earlier).
4: Memory size16 MB of standard user memory.

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 A uses the 1756-BA1 battery; Series B uses the 1756-BA2. Firmware files are the same for both.

Series notes: Studio 5000 keys on catalog number and firmware revision, not series; fit the correct battery for the series.

Intended Use

Intended for plant-wide discrete, process, and motion control applications. ControlLogix controllers run high I/O-count machines, batch and continuous process lines, and coordinated multi-axis motion from a single chassis, with redundancy and plant-network connectivity when the application calls for it. Typical homes are automotive and tire plants, food and beverage lines, water and wastewater, oil and gas skids, and large packaging systems.

Migration Path

Rockwell Automation has discontinued the 1756-L1, L55 and L6x controllers. Published successor for the ControlLogix 5550 / 5555 / 5560: 1756-L74 (ControlLogix 5570) or 1756-L84E (ControlLogix 5580).

The chassis, power supply, I/O and communication modules stay; only the controller slot changes.
Open the project in Studio 5000 (v20 or later for L7x, v28 or later for L8xE), change the controller type, verify and download. 1756-RM085 is not needed; this is a Logix-to-Logix move.
The L7x/L8x have no RS-232 port and no battery: serial-connected HMIs or modems move to Ethernet or USB, CompactFlash gives way to a 1784-SD1 card, and the 1756-BA1/BA2 battery is replaced by the 1756-ESMCAP energy-storage module.

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 DimensionsWeight0.87 lb (0.39 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)

Weight	0.39 kg (0.87 lb) Typical unit weight
Dimensions (H × W × D)	145 × 35 × 145 mm (5.7 × 1.4 × 5.7 in.) Single-slot controller module
Shipping Weight	0.92 kg (2.03 lb) Estimated: unit weight plus box and packing material; bills as 3 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-L72 Generation: ControlLogix 5570; Memory size: 4 MB of standard user memory
1756-L73 Generation: ControlLogix 5570; Memory size: 8 MB of standard user memory
1756-L75 Generation: ControlLogix 5570; Memory size: 32 MB of standard user memory

Allen Bradley Information

Technical SpecificationsLifecycle status

Lifecycle	Discontinued Verify current status with the manufacturer.

Alternate Part Numbers

1756L64

Previously sold 1756-L64

1 sold

NJT Automation has supplied and shipped one 1756-L64 ControlLogix 5560 controller in 2024; request a quote and we will source another from our supplier network.

Sold: 1 in 2024
Price: $200
Series: B × 1

The one 1756-L64 ControlLogix 5560 controller sold in 2024 was used and went for $200.

Sold

Allen Bradley 1756-L64 /B Rev 301 Controllogix 5564 Processor - Lightly Used

$199.99 USD

Used

Request Quote

Can the 1756-L64 be repaired?

Yes. NJT Automation repairs the 1756-L64 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

Prefer an independent shop? Compare bids on RepairMode; providers set their own pricing and warranty.

Find a PLC repair specialiston RepairMode.com ↗

Common 1756-L64 failures

Failure patterns we regularly see on ControlLogix 5560 controller hardware like the 1756-L64:

CompactFlash (1784-CF64 / CF128) corruption: stored project does not load
Front RS-232 serial port damaged from a hot-plugged programming cable
Controller drops off the backplane intermittently: worn chassis connector or cracked board
Battery-holder corrosion after a leaking cell
Program lost on power cycle: battery (1756-BA1 / BA2) depleted, BAT LED red or flashing

Repair or replace?

ReplaceReplacement ControlLogix 5560 controller units are usually surplus or refurbished. Replace the 1756-L64 if it is dead or faulting and you have a current program backup. Check that the series and firmware match your project first. Order the exact 1756-L64. The catalog number sets the 16 MB memory, and a different suffix changes it. The 1756-L64 is not shelf stock, so sourcing time is part of the repair-or-replace decision.

RepairRepair keeps the exact 1756-L64 your program and licensing were validated on and can preserve the memory contents when no backup exists. It is usually the better call for battery-holder corrosion, a damaged comm port or a failed power section when matching stock is scarce. The two 1756-L64 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 1756-L64 gives you a tested spare on the shelf, which is worth more on an older platform where a matching unit can take time to source. Repaired 1756-L64 units are function-tested before return and carry a 1-year warranty.

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-L64?

The Allen-Bradley 1756-L64 is a 16 MB ControlLogix 5560 controller.

What condition is the 1756-L64 in?

The 1756-L64 is available in Used condition. Clean used pull with full functionality. Minimal cosmetic wear and backed by our 1-year warranty.

When does this part ship?

The 1756-L64 is sourced on request. Request a quote and we'll confirm availability and lead time, typically a few business days.

How much memory does the 1756-L64 have?

16 MB of standard user memory.