There is usually a 120 ohm resistor in RS-485 connections. Does this adapter incorporate that 120 ohms internally or do I still need the resistor?

Termination is only required when both length of line and baud rate affect propagation delay. I've used this adapter without a problem with a few different components with lengths way under 1000ft and never needed a termination resistor. You may have to double check line length and baud rate to verify propagation delay in nanosec to confirm whether you'll need a terminator. I hope this helps.

is that really a Mini USB? it looks like a Male B USB connector.

It is a Full Size Male USB Connector, not Mini USB. It works really good... and I find it surprising it says Mini; I don't remember it saying that back when I bought it. I hope this helps.

Is there any visual indicators that it is "working"? i.e. transmit, receive, power, etc. LEDs?

In the instruction sheet that is shown it says:"Power indicator light and data traffic indicator light are also available with the converter for malfunction indication"There are PWR, RXD and TXD labeled LEDs on the module just above the terminal block.

Is this unit plug and play with Windows 10?

Yes, it fully supports Windows 10.

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USB to RS485 Converter with LED Indicators, FTDI Chipset, Terminal Connectors, ESD Protection, Wide OS Support, RS422 Compatible

Product ID: 3981160

Details

Color
Black
Compatible Devices
Laptops Mouse
Connector Type
5-Pin Terminal
Item dimensions L x W x H
2.5 x 1.44 x
Specific Uses For Product
Connecting to

⚡600W surge & 15kV ESD protection

💻FTDI chipset for wide OS compatibility

🔗RS485/422 terminal block with screws

€ 59.52

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Description

🔌 Connect with confidence—legacy tech meets future-proof reliability!

INSTANT STATUS AT A GLANCE - Power, TX, and RX LED indicators let you verify connections instantly—no guesswork, just confidence.
TRUSTED AMERICAN ENGINEERING - Backed by 10+ years of precision design and dedicated support, Gearmo is your go-to for mission-critical serial conversions.
PLUG PLAY INDUSTRIAL STRENGTH - Seamlessly connect legacy serial devices with zero-delay auto data control—no handshaking hassle.
UNIVERSAL COMPATIBILITY ZERO LIMITS - Works flawlessly across Windows, Linux, and macOS, empowering your multi-platform workflow.
BUILT TO WITHSTAND THE TOUGHEST ENVIRONMENTS - 600W surge protection and 15kV ESD isolation ensure your connection stays rock solid in any setting.

The Gearmo USB to RS485 Converter is a compact, industrial-grade adapter featuring a zero-delay FTDI chipset, 600W surge and 15kV ESD protection, and secure terminal block connectors. Compatible with Windows, Linux, and macOS, it offers reliable, plug-and-play serial communication for legacy devices, enhanced by LED status indicators and backed by over a decade of American engineering expertise.

Specifications

ASIN	B005CPI0JQ
Best Sellers Rank	#93 in Serial Adapters
Brand	Gearmo
Color	Black
Compatible Devices	Laptops, Desktops, Mouse, Printers, Tablets, etc.
Connector Type	5-Pin Terminal Block, USB Type A
Customer Reviews	4.7 out of 5 stars 175 Reviews
External Testing Certification	Não aplicável
Finish	Matte
Global Trade Identification Number	00729440692391
Input Voltage	5 volts_of_direct_current
Item Dimensions	2.5 x 1.44 x 0.5 inches
Item Weight	1 ounces
Item dimensions L x W x H	2.5 x 1.44 x 0.5 inches
Manufacturer	Gearmo
Mfr Part Number	USA-482422
Model Number	USA-482422
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	729440692391
Unit Count	1 Count
Warranty Type	1 Year

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€ 59.52

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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