MITSUBISHI QC50B

<h2>Mitsubishi QC50B Melsec PLC Connection Cable</h2> <h3>Description</h3> <p>The Mitsubishi QC50B is a high-quality, 5-meter communication cable designed for the Melsec-A series of PLCs. It provides a reliable connection between the PLC CPU and various peripheral devices, such as programming units, HMIs, or other modules. This cable is essential for programming, monitoring, and maintaining legacy automation systems that rely on the robust Mitsubishi A-series platform.</p> <h3>Specifications</h3> <ul> <li>Manufacturer: Mitsubishi</li> <li>Model: QC50B</li> <li>Product Type: PLC Connection Cable</li> <li>Series: Melsec</li> <li>Length: 5 meters</li> <li>Connector A: 25-pin D-sub Male</li> <li>Connector B: 25-pin D-sub Male</li> <li>Compatibility: Melsec-A Series (AnS, A1S, A2S, etc.)</li> </ul> <h3>Application</h3> <p>This cable is specifically used for establishing a data link with Mitsubishi Melsec-A PLCs for tasks like uploading/downloading programs, system diagnostics, and real-time monitoring of operations.</p> <h3>Country of Origin</h3> <p>Made in Japan.</p> <h3>CO2 Impact</h3> <p>By purchasing this pre-owned cable, you help avoid the 30.0 kg of CO2 emissions associated with manufacturing a new one, contributing to a more sustainable industrial environment.</p> <h3>Availability</h3> <p>This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.</p> <h3>FAQ</h3> <strong>What specific Mitsubishi PLC series is this QC50B cable compatible with?</strong><br><p>The QC50B is primarily designed for the legacy Mitsubishi Melsec-A series, including models like AnS, A1S, A2S, and A3S. It is not compatible with newer series like the Q or iQ-R without an appropriate adapter, which may not support all functions.</p> <strong>Can I use a standard DB25 serial cable instead of the QC50B?</strong><br><p>No, it is not recommended. While the connectors are physically the same (DB25), the pinout of the QC50B is specific to Mitsubishi’s communication protocol between its PLC and peripherals. Using a standard straight-through or null-modem serial cable can cause communication errors or even damage the ports.</p> <strong>What is the maximum reliable length for this type of communication cable?</strong><br><p>The QC50B itself is 5 meters long. Generally, for the RS-232C communication used with these older PLCs, the maximum recommended cable length is around 15 meters (approx. 50 feet) to maintain signal integrity. Using extension cables beyond this length can lead to unreliable data transfer.</p> <p><em>spareparts2day is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.</em></p> <p>Last Update: Friday, March 13, 2026</p>