Allen Bradley 1747-L542 SLC 500 Processor | Ready to Ship
3 in-stock options for this part number
Same part number, ready to ship.
| Shipping | Ships today from Milwaukee, WI . UPS Ground included | Next-Day Air and Worldwide Shipping available at checkout |
| Description | Plc Processor 1 RS-232 1 Dh+ 32 Kb |
| Warranty | 1-year full-function warranty provided by NJT Automation.Warranty detailsThe original Allen Bradley warranty does not apply to pre-owned units. Full warranty coverage is provided directly by NJT Automation. If you have any issues we can usually swap your unit next-day air (based on inventory)-no waiting weeks for a repair. Included: 1 Year +1 Year: +15% of product price +2 Years: +25% of product price |
| Returns | 90-day free returns on all purchases.View return policy |
| Exchange | We will purchase your old or damaged parts. |
NJT Automation supplies the Allen Bradley 1747-L542 SLC 500 Processor with fast next-day delivery, backed by a full 1-year warranty. If you prefer to repair your existing unit, we also offer a mail-in repair service with rush turnaround available.
Replacement Options for 1747-L542
In stock and ready to ship today
| Availability | Multiple Options In StockWe have similar units in stock and can ship immediately once you confirm the condition you need. |
| Repairs | 1747-L542 Mail-In Repair Service | Get Estimate |
| Variants | |
| Part Number | 1747-L542 |
| Manufacturer | Allen Bradley |
| Category | SLC 500 |
Allen Bradley Information | Technical Description Plc Processor 1 RS-232 1 Dh+ 32 Kb Alternate Part Numbers 1747L542 |
Can the 1747-L542 be repaired?
Yes. NJT Automation offers mail-in repair for the 1747-L542, including diagnostic evaluation, component-level repair, and functional testing.
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
- $650 minimum repair charge, shipping included both ways
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 specialistRepair or replace?
Common SLC 500 failures
Failure patterns we regularly see on SLC 500 hardware like the 1747-L542:
- Processor memory or EEPROM faults
- Program loss after battery failure (BATT indicator on the processor)
- 1747 communication failures on DH+, DH-485, or 5/05 Ethernet channels
- Power supply capacitor aging causing rack resets or a dead chassis
- I/O module channel damage from field wiring shorts
- Recurring processor major faults after power events
Why Choose Our Repair Service?
- ■ Rush turnaround available, with 24-hour emergency service on some models
- ■ 1-year full-function warranty, with 2- and 3-year extended options
- ■ No evaluation or diagnostic charges
- ■ Free UPS shipping label available
- ■ "Unrepairable" is not an option
- ■ Thousands of successful Allen-Bradley restorations
Request a Repair Quote
Ready to repair your 1747-L542? Request a repair quote below. For immediate assistance, text photos of your faulty unit and a description of the symptoms to (414) 331-5954.
Still have questions?
Find answers to shipping, warranties, repairs, and more.