The UGREEN USB-A 2.0 to DB9 RS-232 Male Adapter Cable (Model UG-20211) is a high-quality serial connectivity solution designed to bridge the gap between modern computing devices and legacy RS-232 serial equipment. Whether you’re a technician, engineer, or enthusiast needing reliable communication with industrial machines, modems, barcode scanners, or POS systems, this adapter cable delivers dependable performance and plug-and-play convenience.
Key Features & Technical Specifications
Universal Serial Connectivity
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USB-A 2.0 Male to DB9 RS-232 Male Connector – connects USB-enabled computers to devices with 9-pin serial ports easily.
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Supports standard RS-232 communication protocols, making it ideal for industrial controllers, CNC machinery, and legacy peripherals.
Reliable Performance & Data Transfer
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High Data Speed Support – capable of up to 921,600 bps (up to 1 Mbps) for stable serial communication.
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Full RS-232 voltage levels (±12 V) and hardware handshake support (TX/RX, CTS/RTS) ensure accurate, noise-resistant signal transmission.
Broad System Compatibility
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Works with popular operating systems including Windows 7/8/10/11, macOS, and Linux without compatibility issues.
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Many systems recognize the adapter automatically, or via downloadable drivers from FTDI when needed.
Durable Construction
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1.5-meter cable length offers flexibility while maintaining signal integrity.
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Nylon-braided jacket improves strength, resists wear, and reduces tangling over extended use.
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Metal-cased DB9 connector with thumbscrews ensures solid, vibration-free connections in technical environments.
Practical Uses & Benefits
The UGREEN USB-to-RS232 adapter opens up a world of connectivity for both professional and everyday applications:
Industrial & Professional Use Cases
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Connect programmable logic controllers (PLCs), controllers, and test equipment to modern PCs.
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Interface with legacy automation systems for maintenance, programming, or data collection.
Legacy Hardware Support
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Enables communication with older devices such as serial modems, barcode scanners, POS terminals, and older scientific instruments.
Ease of Setup
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Plug-and-play design means quick installation and immediate use in most operating systems.
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USB-powered operation — no separate power adapter required — simplifies setup in workstations and field environments.
Why Choose the UGREEN USB-RS232 Adapter?
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Versatile Connectivity: Bridges modern USB systems with older serial devices without hassle.
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High Stability: Industrial-grade chipsets and RS-232 compliance ensure frequent, error-free data transfer.
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User-Focused Design: Long cable length, durable materials, and secure connectors make this a long-lasting investment.
This detailed breakdown makes it easy for users and search engines alike to understand what the UGREEN USB-A 2.0 to DB9 RS-232 Male Adapter Cable 1.5 m (UG-20211) is, why it matters, and how it can be used across a variety of applications. Let me know if you’d like a comparison with similar adapters or help writing a product title/description optimized for e-commerce listings!







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