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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BENFEI USB to Serial Adapter, USB to RS-232 Male (9-pin) DB9 Serial Cable, Prolific Chipset, Windows 11/10/8.1/8/7, Mac OS X 10.6 and Above, 1.8M（Not VGA）

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 data transfer rate

🔌1.8M USB to DB9 cable length

🖥️Prolific PL-2303 chipset compatibility

14616CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Bridge the old and new—stay connected, stay ahead!

TRUSTED RELIABILITY - Backed by an exclusive 18-month warranty and responsive customer support for peace of mind.
ROBUST DATA INTEGRITY - Triple shielding and tinned copper conductors ensure stable, interference-free transfers.
PLUG PLAY CONVENIENCE - Simple installation with one-time driver setup; powered directly via USB—no extra adapters needed.
UNIVERSAL COMPATIBILITY - Works flawlessly across Windows 11 to XP, Mac OS X 10.6+, and Linux platforms.
SEAMLESS SERIAL CONNECTIVITY - Effortlessly link legacy serial devices to modern USB ports without hassle.

The BENFEI USB to Serial Adapter features a 1.8-meter USB to DB9 cable with a Prolific PL-2303 chipset, delivering up to 1Mbps data transfer. Compatible with a wide range of operating systems including Windows 11/10/8/7, Mac OS X 10.6+, and Linux, it offers reliable, plug-and-play connectivity for serial devices. Its triple-shielded tinned copper wiring ensures stable data transmission, all powered via USB without external adapters. Comes with an 18-month warranty and dedicated customer support.

Specifications

ASIN	B0753HBT12
Best Sellers Rank	#14 in Serial Adapters #2,027 in Computer Cables & Interconnects
Brand	BENFEI
Color	Black
Compatible Devices	Modem
Connector Type	DB9
Current Rating	1 A
Customer Reviews	4.4 4.4 out of 5 stars (6,444)
Finish	Copper
Input Voltage	5 volts_of_direct_current
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
UPC	606682478634
Unit Count	1 Count
Warranty Type	Limited

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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14616CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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