Product Description
The Allen-Bradley 1772-LXD is a PLC 5 mini-processor, the central processing unit of a programmable logic controller, requiring 1.25 Amps at 5 VDC from the backplane and drawing 0.8 to 0.4 Amps while operating at 50-60 Hz with a rated output of 4 Amps at 5 VDC. It features a key switch, onboard serial port, status indicators, communication ports (including DH+ on Channel 1A), high-speed serial link, and data highway plus link. Status indicators display normal operation and error conditions. It boasts a conformal coating, selectable timed interruption, memory protection switch, fast I/O scan, user-selectable PROM/RAM backup, 3 KB of memory, expanded math functions, a sensing device for machine condition monitoring, storage for 198 PLC-supported messages, 488 timers, and battery backup. Its memory is divided into data table, user program, and message storage areas. It has typical AC and DC signal delays of 29 and 30 milliseconds respectively, and lacks a mode select switch.
Is Your Device Showing These Signs?
The Allen Bradley 1772-LXD processor often experiences issues related to memory corruption, requiring memory module replacement or firmware re-flashing. Backplane communication failures are common, stemming from faulty I/O modules or corrupted PLC logic. Power supply degradation leads to intermittent operational faults, necessitating power supply repair or replacement. Programming software incompatibility causes upload/download errors, resolved by software updates or configuration adjustments. Finally, battery depletion results in program loss, addressed by battery replacement and program restoration from backup.
Technical specifications
The Allen-Bradley 1772-LXD is a PLC 5 mini-processor that functions as the CPU of a programmable logic controller. It operates on 5 VDC, drawing 0.8-0.4 Amps at 50-60 Hz, and outputs 4 Amps at 5 VDC. It includes features like a key switch, serial port, status indicators, DH+ communication, high-speed serial link, conformal coating, selectable timed interruption, memory protection, fast I/O scan, user-selectable PROM/RAM backup, 3 KB of memory, expanded math functions, machine condition monitoring, message storage, timers, and battery backup. Its memory is divided into data table, user program, and message storage. It has typical AC and DC signal delays of 29 and 30 milliseconds respectively and lacks a mode select switch.
Our Repair Process for the
1772-LXD
Our repair process for the Allen Bradley 1772-LXD processor begins with a comprehensive diagnostic evaluation to pinpoint the failure. Memory corruption issues necessitate immediate memory module replacement or firmware re-flashing. Backplane communication failures require thorough inspection and replacement of faulty I/O modules, coupled with PLC logic correction. Power supply degradation demands immediate power supply repair or replacement. Programming software incompatibility is resolved through mandatory software updates or configuration adjustments. Battery depletion is addressed by immediate battery replacement and program restoration from the most recent backup.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.

Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.

















