Allen-Bradley 1747-L541 SLC 500 Processor

Allen-Bradley 1747-L541 SLC 5/04 PLC Processor, 16K Words User Memory. NJT Automation sources the 1747-L541 on request; send the part number for a replacement or repair quote.

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

Allen-Bradley 1747-L541 SLC 5/04 PLC Processor – front view

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Part Number	1747-L541
Price	On Request Previously sold for $429.99 - $2,999.99 USDAvailability and condition determine final quote.
Description	SLC 5/04 PLC Processor.
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 ($64.50) 3 years +25% of product price ($107.50) View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1747-L541 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.

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Repairs

1747-L541 Mail-In Repair Service

How the Process Works:

Submit Your RFQ: Complete the request-for-quote (RFQ) form with your exact requirements.
Receive a Quote: We respond ASAP - within 1 hour during business hours.
Approve and Pay: Agree to the quoted price, and we will issue an invoice payable via credit card or your preferred method.
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

SLC 5/04 PLC Processor

1747L541

SLC 5/04 PLC Processor, 16K Words User Memory; channel 0 RS-232 (DF1 / DH-485 / ASCII) and channel 1 Data Highway Plus (DH+).

1747: BulletinSLC 500: Allen-Bradley's small/medium modular PLC family. Bulletin 1747 covers processors, communication modules and accessories; chassis, power supplies and I/O modules are bulletin 1746.
L: Module typeProcessor (CPU) module: occupies slot 0 of the SLC 500 chassis.
5: FamilySLC 500 modular processor.
4: Processor typeSLC 5/04: channel 0 RS-232 (DF1 / DH-485 / ASCII) and channel 1 Data Highway Plus (DH+).
1: Memory size16K words of user memory.

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 DimensionsEst. weight0.82 lb (0.37 kg)H × W × D5.7 × 1.4 × 5.7 in. (145 × 35 × 145 mm)

Estimated Weight	0.37 kg (0.82 lb) Estimated from the product dimensions and typical density for this product type
Dimensions (H × W × D)	145 × 35 × 145 mm (5.7 × 1.4 × 5.7 in.) Single-slot SLC 500 module envelope; 35 mm slot pitch
Shipping Weight	0.90 kg (1.98 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 dimensions are typical manufacturer-published values and may differ by series or option. Unit weight is an estimate; no published figure is available for this catalog number. 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

1747-L531 Processor type: SLC 5/03
1747-L551 Processor type: SLC 5/05
1747-L542 Memory size: 32K words of user memory
1747-L532 Processor type: SLC 5/03; Memory size: 16K words of user memory
1747-L552 Processor type: SLC 5/05; Memory size: 32K words of user memory

Allen Bradley Information

Technical Description

SLC 5/04 PLC Processor, 16K Words User Memory; channel 0 RS-232 (DF1 / DH-485 / ASCII) and channel 1 Data Highway Plus (DH+).

Lifecycle: Discontinued. Verify current status with the manufacturer.

Alternate Part Numbers

1747L541

Previously sold 1747-L541

2 sold

NJT Automation has supplied and shipped 2 1747-L541 SLC 5/04 PLC Processors in 2024; request a quote and we will source another from our supplier network.

Sold: 2 in 2024
Price range: $430 – $3,000
Series: B × 1, C × 1

1747-L541 SLC 5/04 PLC Processors have sold for $430 – $3,000.

Sold

2014 Allen Bradley 1747-L541 SER C SLC 500 CPU Processor Unit 1747L541 - Surplus

$2,999.99 USD

Unused surplus (new old stock)

Request Quote

Sold

Allen-Bradley 1747-L541 Ser B SLC 500 5/04 PLC CPU Module - Lightly Used

$429.99 USD

Used

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Can the 1747-L541 be repaired?

Yes. NJT Automation offers mail-in repair for the 1747-L541, 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 1747-L541 failures

Failure patterns we regularly see on SLC 5/04 PLC Processor hardware like the 1747-L541:

FLT LED on and the processor will not go to RUN (major fault that returns after clearing)
Channel 0 RS-232 port damaged by a hot-plugged or miswired programming cable
DH+ channel 1 dead on a 5/04 (transceiver failure on the 3-pin blue-hose port)
Ethernet port failure or dropped connections on a 5/05
Keyswitch worn: processor will not stay in RUN or REM

Repair or replace?

ReplaceReplacement SLC 5/04 PLC Processor units are usually surplus or refurbished. Replace the 1747-L541 if it is dead or faulting and you have a current program backup. Check that the series and firmware match your project first. The 1747-L541 is not shelf stock, so sourcing time is part of the repair-or-replace decision.

RepairRepair keeps the exact 1747-L541 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 1747-L541 symptoms we see most often are “Program lost on power cycle” and “FLT LED on and the processor will not go to RUN”. If a replacement is already installed, repairing the failed 1747-L541 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 1747-L541 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

Related services:PLC Repair All Repair Services

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.

Frequently Asked Questions

What is the 1747-L541?

The Allen-Bradley 1747-L541 is an SLC 5/04 PLC Processor, 16K Words User Memory; channel 0 RS-232 (DF1 / DH-485 / ASCII) and channel 1 Data Highway Plus (DH+).

What condition is the 1747-L541 in?

The 1747-L541 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.

How much does the 1747-L541 cost?

At NJT Automation, 2 1747-L541 SLC 5/04 PLC Processors have sold in 2024 for $430 – $3,000. None are in stock at the moment; request a quote for current pricing.

When does this part ship?

This 1747-L541 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.

Can you ship this next-day air?

Yes. UPS Next Day Air is available at checkout for the 1747-L541 SLC 5/04 PLC Processor. 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.

Can I pick this item up locally?

Yes. Once your 1747-L541 has been sourced and is ready, free local pickup is available at NJT Automation, 2122 N Prospect Ave, Milwaukee, WI, during business hours.

How much memory does the 1747-L541 have?

16K words of user memory.