Does this product work with RS-422 signals?

Nope. RS-232 only. Great product if you want four RS-232 ports on your computer, but won’t help you with handling RS-422.

Is there any update about Windows 10 compatibility?

Works just fine on Windows 10. If your computer has internet access, just plug it in, the latest drivers are available from Windows Update and Windows 10 will find them on its own (with internet access). Otherwise, check the manufacture's site, there is an .exe installer there.

For use connecting to console ports on computers or switches or such, are gender-bending and/or null modem adapters required?

The way this USB to RS232 serial adapter is being used by me is to connect it to a computer that has only USB ports and no RS232 serial ports. The four DB9 (male) connectors of the adapter are then connected to serial devices, either directly or with a RS232 serial cable (not a crossover/null modem cable) to my devices that require a RS232 serial connection to my computer. In general, if the device to which this adapter is being connected requires a female DB9 connector on the attaching cable, then a gender changer would be required. If the serial device to which the adapter is going to be connected requires a crossover/null modem serial connection, then a crossover cable/null modem adapter would be required. The answer to this question will depend on what is required by the device to which this adapter will be connected assuming the connection to a computer USB port and adapter drivers are installed correctly.

What is the voltage on the Tx pin (pin 3)?

-5.7V for logic high, +4.2V for logic low, measuring from pin 3 to pin 5.

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Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length)

Product ID: 4596906

Details

Color
Black
Connector Type
DB9 Male w/ A
Item dimensions L x W x H
36 x 1.5 x 0.5
Specific Uses For Product
Connecting to

⚡±15kV ESD & surge protection

💨921,600 bps max data rate

🔌4 RS232 ports from 1 USB

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Description

🔗 Legacy Meets Lightning: Connect More, Configure Less, Work Smarter!

QUAD PORT POWERHOUSE - Connect 4 legacy serial devices simultaneously via a single USB port—streamline your workspace effortlessly.
PLUG AND PLAY SIMPLICITY - Zero configuration needed—seamlessly compatible with Windows, macOS, and Linux for instant productivity.
LIGHTNING FAST RELIABLE - Supports blazing data rates up to 921,600 bps with full 9-wire handshaking for rock-solid, lag-free communication.
INDUSTRIAL GRADE DURABILITY - Shielded cable with ferrite ring and screw-lock DB9 connectors built to withstand harsh environments (-40°C to 85°C).
REAL TIME STATUS MONITORING - Integrated TX/RX and power LEDs keep you informed of connection health at a glance—no guesswork required.

The Gearmo 4 Port USB to RS232 Serial Adapter leverages a premium FTDI chipset to connect up to four DB9 serial devices through a single USB port. Designed for plug-and-play ease across Windows, macOS, and Linux, it supports high-speed data transfer up to 921,600 bps with full hardware flow control. Built tough with industrial-grade shielding, screw-lock connectors, and ±15kV ESD/surge protection, this adapter ensures reliable, noise-resistant connections in demanding environments. Ideal for professionals managing legacy serial equipment in modern workflows.

Specifications

ASIN	B004ETDC8K
Best Sellers Rank	#130 in Serial Adapters
Brand	Gearmo
Color	Black
Compatible Devices	Devices with DB9 female serial connectors such as printers, scanners, modems, CNC machines, PLCs, and other legacy serial equipment
Connector Type	DB9 Male w/ Screws, USB Type A
Customer Reviews	4.6 4.6 out of 5 stars (222)
Global Trade Identification Number	00729440626044
Input Voltage	5 volts
Item Dimensions	36 x 1.5 x 0.5 inches
Item Weight	6.24 ounces
Manufacturer	Gearmo
Mfr Part Number	USA-FTDI4X
Model Number	USA-FTDI4X
Number of Items	1
Number of Ports	4
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	Connecting legacy serial devices to modern USB host systems
UPC	729440626044
Unit Count	1 Count
Warranty Description	1 Year
Warranty Type	Limited 1 year warranty

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R1723

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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