will this device work on linux ubuntu?

As an FTDI-based serial adapter, this works just fine under Ubuntu and most other linux distributions as the drivers have been included in the linux kernel since version 2.6.

Will driver work in Windows 8.1 / 10? Using it for RS422 TXA- (1)TXB+ (2) / RXA- (6) RXB+ (7)?

I don't know. I used this device in a development project for a client. I used it with Cygwin on a Windows 7 system and on a RS485 bus to which I had attached multiple devices. It worked flawlessly in this respect. No clue about RS422 or later Windows releases.

I need for a 2 wire PTZ security camera, what will work that has a usb connection? This is driving me crazy. PLEASE HELP

This unit is ONLY for USB to RS-485 connection, however, it will handle a 2 wire connection. I'm not sure what drivers a PTZ camera needs, but you should be able to find them on their website.

Can I use 2 of these converters on one Windows 7 computer (using two separate USB ports) to do a loop back test?

I haven't done it myself, but it should work fine. I have one of these. Once installed, the device appears to Windows 7 as a serial port device. If you install two of them, they will appear as two separate serial ports.You just need to make sure to wire them up appropriately.

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Gearmo RS485 to USB Adapter with LED Indicators, FTDI Chipset, Terminal Board, ESD Protection, Supports Windows 11, Linux, MacOS X, RS422 to USB Compatible, 5ft Cable

Gearmo RS485 to USB Adapter with LED Indicators, FTDI Chipset, Terminal Board, ESD Protection, Supports Windows 11, Linux, MacOS X, RS422 to USB Compatible, 5ft Cable

Product ID: 78706845

Details

Brand
Gearmo
Color
Blue
Connector Type
Serial DB9 w/
Specific Uses For Product
Connecting to

⚡600W surge & 15kV ESD protection

💻Plug & play on Win, Mac, Linux

🔗Supports RS422 & RS485 protocols

S$61

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Description

🔌 Bridge the old and new—connect with confidence!

UNIVERSAL COMPATIBILITY - Seamlessly connects legacy DB9 serial devices to modern USB ports across all major OS platforms.
TRUSTED ENGINEERING LEGACY - Gearmo’s decade of USA-based innovation ensures top-tier quality and support.
INDUSTRIAL GRADE DURABILITY - Built to withstand 600W surge and 15kV ESD for mission-critical reliability.
REAL TIME CONNECTION FEEDBACK - Integrated Power, TX, and RX LED indicators for instant diagnostics and peace of mind.
VERSATILE MULTI PROTOCOL SUPPORT - Effortlessly switch between RS422 and RS485 standards with a single adapter.

The Gearmo RS485 to USB Adapter is a rugged, 5ft cable solution featuring an FTDI chipset for reliable RS422/RS485 to USB conversion. It offers industrial-grade surge and ESD protection, real-time LED status indicators, and broad OS compatibility including Windows 11, Linux, and macOS. Designed for professionals needing seamless integration of legacy serial devices with modern systems, it combines durability, versatility, and trusted American engineering.

Specifications

ASIN	B005CPLOVW
Best Sellers Rank	#62 in Serial Adapters
Brand	Gearmo
Color	Blue
Compatible Devices	Devices with DB9 female serial connectors such as printers, scanners, modems, CNC machines, PLCs, and other legacy serial equipment
Connector Type	Serial DB9 Male w/ Hex Nuts, USB Type A
Customer Reviews	4.5 4.5 out of 5 stars (101)
Input Voltage	5.7 Volts (DC)
Item Weight	2.4 ounces
Manufacturer	Gearmo
Mfr Part Number	US-485422
Model Number	US-485422
Number of Items	1
Number of Ports	2
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	Connecting legacy serial devices to modern USB host systems
UPC	729440692384
Unit Count	1.0 Count
Warranty Description	1 Year
Warranty Type	1 Year

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S$61

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In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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