Product Description
The 2.0-meter Mitsubishi QC20B, an unshielded (typically) PVC-insulated extension cable for Melsec-Q series base units, expands connectivity in industrial automation with its -20C to +70C operating range, standard Q Series connectors, and IP20 rating for indoor use.
Is Your Device Showing These Signs?
The Mitsubishi QC20B programmable logic controller commonly experiences failures in its power supply module, leading to system downtime. Corrosion on the I/O modules disrupts signal transmission, requiring cleaning or replacement. Memory card corruption causes program loss, necessitating data restoration or reprogramming. Communication errors arise from faulty Ethernet ports or incorrect network configurations, demanding port repair or network reconfiguration. Overheating due to inadequate cooling damages internal components, mandating improved ventilation or component replacement.
Technical specifications
The Mitsubishi QC20B is a 2.0-meter, unshielded extension cable for Melsec-Q series base units, featuring a -20C to +70C operating range, Q Series connectors, and IP20 rating for indoor industrial automation applications.
Our Repair Process for the
QC20B
Our repair process for the Mitsubishi QC20B programmable logic controller begins with a thorough diagnostic assessment to pinpoint the failure. Power supply module failures are addressed through component-level repair or complete module replacement. Corrosion on I/O modules is rectified via meticulous cleaning or module replacement to ensure proper signal transmission. Memory card corruption necessitates immediate data restoration from backups or complete reprogramming of the PLC. Communication errors stemming from faulty Ethernet ports require port repair or a comprehensive network reconfiguration. Overheating issues are resolved by improving ventilation systems or replacing damaged internal components to maintain optimal operating temperatures.
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.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY