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Item#: N82E16812191251

SIIG Model JU-SC0011-S1 11.81" 2-Port USB to RS-232 Serial Adapter Cable

  • 3 Connector Number
  • Black
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SIIG's 2-Port USB to RS-232 Serial Adapter Cable is designed to add 2 RS232 serial ports to your USB-enabled desktop or notebook computer. It supports serial port data transfer rates of up to 230Kb/s, supports USB plug and play, and is powered by the USB bus, no external power adapter is needed. It is the perfect solution for connecting additional RS232 serial devices such as modems, digital cameras, ISDN terminal adapters, graphics tablets, PDAs, bar code scanners, label printers and more.

The 2-Port USB to RS-232 Serial Adapter Cable is FCC and CE approved and RoHS-compliant. It is compatible with a wide variety of Windows operating systems and is backed by SIIG's limited 5-year warranty.

Learn more about the SIIG, Inc JU-SC0011-S1


USB to DB9 (RS-232)


Connector Number
Connector Detail
1, 4-pin, Type A, USB, Male, Input
2, 9-pin, DB9, RS232, Serial, Male, Output
Supports various serial devices, such as modems, PDAs, card readers, and more

Supports data transfer rate up to 230Kb/s

Chip: Moschip MCS7820CV

Certifications/Standards: FCC, CE, RoHS


Adds two 9-pin serial ports to your USB-equipped system

USB plug-n-play and bus-powered

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years

Customer Reviews of the SIIG, Inc JU-SC0011-S1

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  • Michael H.
  • 12/31/2013 12:04:15 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsWorks fine - LED indicators a plus

Pros: LED indicators are helpful to assist with troubleshooting, especially when working with older pieces of equipment.

Cons: The nuts on the DB-9 connector are molded in and cannot be removed. This makes it impossible to connect directly to a female bulkhead connector unless the retaining nuts can be removed on the mating connector.

That one issue cost an egg. There's no reason the nuts on the connector shouldn't be removable. The whole point of a USB to RS232 adapter is to provide maximum flexibility to those of us who need to interface with legacy hardware.

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  • Patrick S.
  • 11/24/2013 11:21:03 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGood Product That WORKs

Pros: USB to Serial is typically a gamble. I have a pile of 'converters' that just never worked for one reason or another.

SIIG has been one of the more reliable product lines that HAVE worked.

With the correct Win8 drivers, this hooked up easily and has performed flawlessly ever since.

Cons: Product was clearly ready for Win8. Yet the drivers on the CD were for Win7 which did not work.

SIIG had the correct drivers on their website, and once the correct drivers were installed it has worked well.

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Computer Hardware > 
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Computer Cables > 
Serial Cables > 
SIIG, Inc > 
Item#: N82E16812191251
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