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Black USB-A to 9-pin serial converter cable, 21 inches

TRENDnet

TRENDnet TU-S9 USB to Serial 9-Pin Converter Cable 21 Inch

SKU CH-6NAD-TBZCR MPN TU-S9

Connects an RS-232 serial device to a USB 1.1, 2.0 or 3.0 port with a 21 inch cable and Windows or Mac support

  • Connector count2
  • Connector detailsConnector A: 1 x USB 1.1 Type A Male Connector B: 1 X RS-232
  • Connector genderMale to Male
  • Product typeCable Connectors
  • Product colorBlack
  • Overall length21 -- 25 in
  • Connect RS-232 devices via USB with 21 inch cable
  • USB 1.1, 2.0 and 3.0 port compatibility for broad use
  • Windows 10, 8.1, 8, 7 and Mac OS 10.6–10.11 support
  • 500 kbps data rate handles serial communication needs
  • 540 mm flexible cable suits most installation scenarios

USB to Serial Converter Cable

The TRENDnet TU-S9 connects RS-232 serial devices such as modems or printers to a USB Type-A port on a desktop or laptop. It installs as a standard Windows COM port with full modem control signals. The adapter works with USB 1.1, 2.0 and 3.0 ports.

Windows and Mac OS Support

Drivers cover Windows 10, 8.1, 8, 7 and Mac OS 10.11 down to 10.6. Plug-and-play setup lets the cable be recognised in seconds without extra configuration. This breadth keeps legacy hardware working on modern and older operating systems alike.

500 kbps Maximum Data Rate

The link tops out at 500 kbps, so it suits equipment that communicates at or below that speed. Devices needing higher throughput will not perform correctly. The 21-inch cable length fits typical desk or rack installations.

How it compares

Measured against everything we stock in RS-232 Serial Cables, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 64% of the 93 comparable items (median $21.99).

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Specifications

Product
Brand nameTRENDnet
Model nameTU-S9
Product typeCable Connectors
Product colorBlack
Ports & slots
Connector count2
Connector detailsConnector A: 1 x USB 1.1 Type A Male
Connector B: 1 X RS-232 (9-pin) Male
Connector genderMale to Male
Size & build
Overall length21 -- 25 in
Shipping weight0.12 kg
Package size222 × 165 × 57 mm

Questions about this item

Will the USB connector or DB9 plug wear out after frequent insertion?

The cable uses standard USB Type A and RS-232 9-pin male connectors rated for typical mating cycles; avoid excessive force when plugging or unplugging.

What limits throughput during continuous data transfer?

The adapter caps serial data rates at 500 kbps, so sustained throughput cannot exceed that figure.

Does the adapter draw enough power to heat up during all-day operation?

Maximum draw is 500 mA from the USB port, and the operating range is 0–40 °C, so it stays cool under normal loads.

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