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USB to Serial Adapters (RS232)

Below products are sorted: lowest price/least features to highest price/most features.





Product Image Item Name- Price
USB to Serial Adapter - Economy Mini

USB to Serial Adapter - Economy Mini

This low-cost mini USB to Serial adapter is ideal for mobile applications and devices. It is utilizing the low-cost PL2303 chip from Prolific which makes it easy to add a serial port to your desktop or laptop, for general office, commercial and...
$9.95


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USB Serial Adapter - Economy

USB Serial Adapter - Economy

Notice: As most low-cost USB to RS232 adapters this adapter is not recommended for use with Windows 7 and Vista and it will not work with Windows 8. Check our Windows 7 / 8 compatible USB to RS232 adapter. Also please see why some adapters are not...
$12.95


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USB to Serial Adapter - PRO Mini

USB to Serial Adapter - PRO Mini

We expect this item in stock by early November, you are welcome to place your order now and we will ship it as soon as it becomes available. As an alternative we recommend part XS880. This PRO version mini USB to Serial adapter is similar to our STD...
$24.50


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USB to Serial Adapter - PRO Basic

USB to Serial Adapter - PRO Basic

What we have here is a USB to serial RS232 adapter designed around an American made CY7C64225 chipset from Cypress Semiconductors. The Cypress chipset has a reliable and solid architecture with all basic features, however it does not have some of...
$29.95


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USB to Serial Adapter - Professional

USB to Serial Adapter - Professional

So you are looking for a good low-cost USB Serial adapter (RS232) and you are asking yourself " Will a $10 USB Serial adapter cable work with my device? and will it work with Windows 7 and Windows 8?! " Well read on and find out why you have to be...
$34.95


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USB Serial Adapter - Ultimate

USB Serial Adapter - Ultimate

This is our high quality USB to Serial adapter . It is one of the most reliable, high performance and easy to use USB serial adapters on the market. It is optimized for Windows 8 and Windows 7 32 and 64-bit versions but will of course also work...
$37.95


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USB Serial Adapter, 2-ports

USB Serial Adapter, 2-ports

This dual port RS232 to USB adapter cable which is designed around the high performance and reliable MCS7820CV-AA chip from Moschip easily adds 2 standard serial RS232 ports to your desktop, laptop or other mobile device. Serial outputs are...
$39.75


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USB Serial Adapter, 2-ports - PRO

USB Serial Adapter, 2-ports - PRO

Here is a USB to dual RS232 serial port adapter cable which is similar to our Y-106 adapter with the difference that it has the new generation Prolific PL2303-TA chipset, provision for external power, LED lights and stand-off nuts on each side of...
$48.00


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Moxa USB to Serial Adapter, 2-ports

Moxa USB to Serial Adapter, 2-ports

Another high quality converter from MOXA, the UPort 2210 is a 2-port USB to RS232 serial converter which will allow you to connect two serial devices to your computer via one USB port. It will create two virtual COM ports in your computers Device...
$129.00


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USB Serial Adapter, 4-ports

USB Serial Adapter, 4-ports

Desktop-style commercial strength 4-port USB-RS232 converter optimized for Windows 8 and Windows 7 but will also work fine with Linux, Mac and older operating systems. With this multi-port USB-RS232 converter you can easily add four RS232 COM ports...
$69.95


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USB to 3-Port RS232/485/422, Isolated

USB to 3-Port RS232/485/422, Isolated

The MWE820B is an industrial strength very solid and reliable isolated USB to Serial Converter with RS232 / RS422 / RS485 interfaces that requires no external power supply. With its standard DIN rail mount and screw terminals it is a great choice...
$75.00


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The USB to Serial Adapter - Generally

A USB to serial adapter, also referred to as a USB serial converter or RS232 adapter is a small electronic device which can convert a USB signal to serial RS232 data signals. RS232 is the type of signal which is in many older PCs and is referred to as a serial COM port.

A USB to serial adapter typically converts between USB and either RS232, RS485, RS422 or TCP signals, however some USB to serial adapters have other special conversion features such as custom baud rates, high-speed or other.

Even the USB to serial adapter RS232 standard is an older communication protocol it is still used by many modern serial RS232 devices in both business and consumer markets and is also often used for personal and office serial devices.
More recently most new computers do not have a built-in COM port so a USB serial adapter is often used for connecting many types of serial devices to a computer. A standard USB to serial adapter is a very useful device for connecting equipment such as printers, scanners, scales and GPS devices, but also most business and consumer equipment can be connected to a computer by using an industrial grade adapter.

The USB serial adapter is made in different versions and grades, the 1-port adapter is very popular and one of the most commonly used adapters. Two to four port adapters are also frequently used if the user needs more than one serial port. Multi-port adapters can be connected to a computer by using just one USB cable, where after the computers operating system will create multiple virtual COM ports. Grades range from standard consumer grade to industrial grade and even mission critical grade adapters.
Most consumer grade USB serial adapters are not optically isolated or protected against high voltage spikes however most industrial grade adapters are optically isolated which means they are protected against voltage spikes and surges, ground-loops and most other voltages which potentially can damage the adapter or the connected serial devices.

The serial RS232 protocol has existed since the early 60'ties so you may wonder why it is still being used today. The reason is that it is a very reliable way of data communication and it is fairly easy to understand for engineers so it's easy to develop and program new devices. Another reason is that since the serial protocol has existed for such a long time, many devices already have the serial protocol built-in so its easy to integrate new devices with old devices.