Anyone have any luck getting these to work with with Windows 11? Neither of mine work. I get an error in device manager that says to contact supplier

The messed up part is with a little help from Google there is a work around for the PL-2303A chipset with Win 11. AFAIK there is absolutely no reason why Win 11 would work with this chipset. Prolific must have supplied the pseudo driver (the one that lists the error) to Microsoft for use w/ Win 11. Planned obsolescence, BS! I would boycott any product with a Prolific chipset just to put it to them as they try to rip-off consumers. If you already have one, the procedure requires you to delete the nonsense the junk Prolific supplied Microsoft for Win 11 and load the Win 10 driver. I have tried and tested this and it works. DON'T BUY THIS PRODUCT FOR WINDOWS 11 SYSTEMS, native driver will not work and none will be officially available as Prolific has EOL this product in 2019.

Does this operate at rs232 levels or does it only convert to 5v logic levels?

This cable is rs232 signal level. Amazon does sell a similar cable (same chip set) that supports ttl level signal. The other cable has flying leads for your application

Why does that cross-section of the cable show so many wires? shouldn't there be only four lines for usb?

The wires that are shown are for the serial end of the cable. They are shown in groups with 3 tinned copper conductor. the wire groups each go to their connection on the serial end.

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USB to RS232(DB9) Cable

Product ID: 61385215

Details

Brand
BENFEI
Color
Black
Compatible Devices
Modem
Connector Type
DB9
Item dimensions L x W x H
0.39 x 0.39 x

⚡1Mbps high-speed data transfer

🔌1.8M USB to DB9 cable length

🖥️Prolific PL-2303 chipset for wide OS support

NZ$32

Duties & taxes included

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Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Connect Like a Pro — Never Miss a Byte!

COMPACT PORTABLE - Slim, lightweight design fits perfectly in any professional toolkit or travel bag.
TRUSTED RELIABILITY - Backed by an exclusive 18-month BENFEI warranty and responsive customer support.
ROBUST DATA INTEGRITY - Triple-shielded tinned copper conductors ensure stable, interference-free serial communication.
PLUG PLAY SIMPLICITY - Effortless setup with one-time driver install—get connected in seconds.
UNIVERSAL COMPATIBILITY - Seamlessly works across Windows 11 to XP, Mac OS X 10.6+, and Linux—future-proof your gear.

The BENFEI USB to Serial Adapter features a 1.8-meter USB to DB9 cable with a Prolific PL-2303 chipset, delivering reliable 1Mbps data transfer. Compatible with a broad range of operating systems including Windows 11/10/8/7, Mac OS X 10.6+, and Linux, it ensures seamless connectivity for serial devices like modems and barcode scanners. Its triple-shielded tinned copper wiring guarantees stable signal integrity, all powered via USB with no external adapter needed. Supported by an 18-month warranty, this adapter is a must-have for professionals demanding dependable serial communication.

Specifications

ASIN	B0753HBT12
Best Sellers Rank	#21 in Serial Adapters #2,484 in Computer Cables & Interconnects
Brand	BENFEI
Color	Black
Compatible Devices	Modem
Connector Type	DB9
Current Rating	1 Amps
Customer Reviews	4.4 4.4 out of 5 stars (6,396)
Finish	Copper
Input Voltage	5 Volts (DC)
Item Dimensions	0.39 x 0.39 x 0.39 inches
Item Weight	1 Ounces
Manufacturer	BENFEI
Mfr Part Number	000151black
Model Number	000151
Number of Items	1
Number of Ports	1
Package Quantity	1
Smart Home Compatibility	Not Smart Home Compatible
UPC	606682478634
Unit Count	1.0 Count
Warranty Type	Limited

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NZ$32

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to New Zealand.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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