Product Description
The Allen-Bradley 1772-MJ is a 3K non-volatile EEPROM memory module designed to provide backup memory for Mini-PLC-2/05 processors. It features a 4A output current at 5V DC, operates at 50-60 Hz with a 10-32V DC digital voltage range, and exhibits typical off-state signal delays of 29 +/- 8 ms (AC) and 30 +/- 7 ms (DC). This conformally-coated module (4.5 x 12.4 x 6.3 inches, 0.3 lbs/0.1 kg) utilizes a 1771-WN wiring arm and should be installed on the bottom of the processor, taking care to avoid touching the recessed conductors due to static sensitivity and potential corrosion. In remote program mode, it allows for memory duplication and transfer between the CMOS RAM and the module, offering options for conditional transfer, automatic EEPROM backup to RAM (without EEPROM transfer), and use as an alternate program storage. Memory protection can be enabled by removing a jumper on the module.
Is Your Device Showing These Signs?
The Allen Bradley 1772-MJ I/O module commonly experiences failures related to corroded backplane connectors, leading to intermittent communication errors and system downtime. Technicians address issues such as failed electrolytic capacitors on the power supply section, causing voltage instability and operational faults. Resolving these problems involves cleaning and reseating the connector, replacing faulty capacitors, and performing thorough diagnostic testing to ensure proper functionality and prevent recurrence of I/O failures. Firmware corruption also occurs, necessitating a firmware reload to restore proper operation.
Technical specifications
The Allen-Bradley 1772-MJ is a 3K EEPROM memory module for Mini-PLC-2/05 processors, providing backup memory. It has specific power and signal delay characteristics and is designed for installation at the bottom of the processor using a 1771-WN wiring arm. It allows for memory duplication and transfer between RAM and EEPROM in remote program mode, offering various transfer options and memory protection via a jumper.
Our Repair Process for the
1772-MJ
Our repair process for the Allen Bradley 1772-MJ I/O module begins with a meticulous inspection of the backplane connector for corrosion; technicians will clean and reseat the connector to ensure optimal contact. Next, the power supply section undergoes a comprehensive evaluation, with any failed electrolytic capacitors replaced to stabilize voltage and eliminate operational faults. If firmware corruption is suspected, a firmware reload is performed to restore proper operation. Following these steps, rigorous diagnostic testing is conducted to verify full functionality and prevent any future I/O failures.
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.