UGREEN USB to RS232 DB9 Cable 3m
Product description
At a glance
The UGREEN USB to RS232 DB9 cable is a 3 metre USB to serial adapter that links modern PCs and laptops to legacy RS232 devices such as routers, switches and telescope controllers. It delivers a straightforward wired connection with a PL2303 chipset and is powered from the host USB port, so no separate power supply is needed. If you need a reliable serial link for configuration or device control, this cable covers the basics with minimal fuss and clear compatibility notes.

Tech specs


- Name: UGREEN USB Serial Cable USB to RS232 DB9 9 pin Converter Cable
- Type: USB to RS232 serial adapter
- Format: USB Type A Male to 9‑pin DB9 RS232
- Length: 3m
- Processor: PL2303 chipset
- Conductor: Tinned copper wire gauge 24 and 28
- Shielding: Triple shielding

Why it’s worth it
This cable keeps things simple, offering plug and play after a one time driver install according to the manufacturer. Triple shielding and tinned copper conductors aim to reduce interference on long runs, which helps when you are configuring network kit or steering a telescope controller at a distance. Note that driver availability can vary by operating system, so check compatibility before purchase.



How to use it
Connect the USB Type A plug to your computer and the DB9 end to the serial device, then install the provided PL2303 driver if required. It works well for console access to Cisco routers and switches, for interfacing with Celestron NexStar hand controllers, and for certain AV control hardware such as Extron and Crestron units. It’s a practical cable for network engineers, hobby astronomers and AV technicians.

What you get
The pack contains a USB 2.0 to Serial 9‑Pin DB9 RS232 converter cable. No external power adapter is included or required, as the cable draws power from the host USB port.
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