Product Description
The Allen-Bradley 1775-MEFA Series A is a 256K memory module for the PLC-3 3/10 programmable controller, providing program data storage and backup. It occupies a single slot in the processor chassis, using a non-rechargeable lithium battery for up to 75 days of memory retention during power outages. The module features volatile, low-power Static CMOS RAM with Error Detection and Correction (EDC), drawing 1.9A at 5V DC and 0.15A at 15V DC from the chassis power supply. Installation involves removing power, inserting the module into the designated slot, securing it with the chassis latch, setting the thumbwheel switch, and restoring power. The module monitors its own status, correcting single-bit memory errors without system interruption, and operates between 32-140F with 5-95% humidity, and can be stored between -40-185F.
Is Your Device Showing These Signs?
The Allen Bradley 1775-MEFA commonly experiences issues such as backplane communication failures due to corroded connector pins, requiring thorough cleaning or replacement. Memory corruption within the module leads to PLC faults and program instability, necessitating memory module replacement or firmware reflashing. Power supply degradation causes intermittent operation and system crashes; replace the power supply to ensure stable voltage levels. Resolve I/O module communication errors by verifying proper addressing and configuration settings within the PLC program. Address software compatibility problems by updating the PLC firmware to the latest revision.
Technical specifications
The Allen-Bradley 1775-MEFA Series A is a 256K memory module designed for the PLC-3 3/10 programmable controller. It provides program data storage and backup, using a lithium battery for up to 75 days of memory retention during power loss. The module features volatile CMOS RAM with Error Detection and Correction, consumes 1.9A at 5V DC and 0.15A at 15V DC, and is installed by inserting it into the processor chassis. It monitors its own status, corrects single-bit errors, and operates within specified temperature and humidity ranges.
Our Repair Process for the
1775-MEFA
Our repair process for the Allen Bradley 1775-MEFA begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the malfunction. Backplane communication failures due to corroded connector pins are resolved through meticulous cleaning or complete replacement of the affected connectors. Memory corruption issues are rectified by replacing the memory module or reflashing the firmware to restore program stability. Power supply degradation is addressed by replacing the power supply unit to guarantee consistent voltage levels. I/O module communication errors are corrected by verifying and adjusting the PLC program's addressing and configuration settings. Software compatibility problems are eliminated by updating the PLC firmware to the most current revision.
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.
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