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Two black USB-to-DB9 serial cables, 80 cm each

Ruth's sister

Ruth's sister CH340 USB to RS232 DB9 Cable 80cm 2Pcs

SKU CH-CWYW-3S4W0

Two CH340 USB to RS232 DB9 serial adapters, each 80 cm long, for legacy COM-port devices

  • Two CH340 USB to RS232 DB9 adapters in one pack
  • 80 cm cable length for flexible serial device placement
  • CH340 chipset enables USB to 9-pin DB9 conversion
  • Windows 7 support for legacy serial port connectivity

CH340 USB to RS232 DB9 Adapter Pair

This pack contains two CH340 USB to RS232 serial cables, each fitted with a 9-pin DB9 connector. They provide a straightforward way to add a legacy COM port to a modern computer for configuring industrial gear, network hardware or older peripherals. The 80 cm length gives enough reach for bench work without excess cable clutter. Windows 7 support is confirmed by the supplier.

80 cm Cable Length and Dual-Pack Utility

Each cable handles standard RS232 signalling at the 340 chip's native rate, which is sufficient for console access, firmware updates and simple telemetry tasks. The pair lets you keep one on a workbench and another in a field kit, or drive two devices simultaneously from separate USB ports. Very long runs or high-speed synchronous protocols are beyond the practical reach of this adapter type.

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Price $7.99
Cheaper than about 91% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the CH340 USB to RS232 DB9 cable work with my older serial devices that use a 9-pin connector?

Yes, the cable provides a standard 9-pin DB9 male connector that plugs directly into legacy serial equipment, and the CH340 chipset handles the USB-to-serial conversion.

How can I confirm the CH340 adapter is functioning correctly after I plug it in?

Open Device Manager in Windows; a new COM port should appear under Ports (COM & LPT) labelled USB-SERIAL CH340, indicating the driver has loaded and the link is active.

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