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SIIG, Inc > 
Item#: 9SIA24G28M5714

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

  • 3 Connector Number
  • Black

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

General information

The SIIG JU-SC0011-S1 USB to RS-232 adapter cable turns a USB port into two 9-pin RS-232 serial ports. 9-pin RS-232 serial port is obsolete and hardly found on the latest systems. It is a legacy standard for use in a variety of devices such as modems, digital cameras, ISDN terminal adapters, graphics tablets, PDAs, bar code scanners, label printers and more. This adapter 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.

  • Chip: Moschip MCS7820CV
  • Adds two 9-pin RS-232 serial ports to your USB-equipped system
  • Supports data transfer rate up to 230Kb/s
  • USB plug-n-play and bus-powered
  • Supports various serial devices, such as modems, PDAs, card readers and more

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
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

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

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  • James K.
  • 12/31/2013 12:04:15 PM
  • 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
  • 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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Item#: 9SIA24G28M5714
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