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USB serial adapters can be isolated or non-isolated. Some chip models have drivers installed by default, including FTDI, while drivers for other chip models must be manually installed e.
This article needs additional citations for verification. Historically most personal computers had a built-in D-sub serial RS port, also referred to as a COM port, which could be used for connecting the computer to most types of serial RS devices.
Hamma USB adapter is a type of protocol converter which is used for converting USB data signals to and from other communications standards.
Articles needing additional references from October All articles needing additional references. The primary application scenario is to enable USB based computers to access and communicate with serial devices featuring D-Sub usually DB9 or DB25 connectors or screw terminals, where security of the data transmission is not generally an issue.
Retrieved 11 December This page was last edited on 12 Decemberat Cp21011 USB processor sends the processed USB signals to a serial driver chip which applies the correct voltages and sends the processed data signals to the serial output. Retrieved 14 October Adapters for converting USB to other standard or proprietary protocols also exist; however, these are usually not referred to as a serial adapter.
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The non-isolated version has no protection against static electricity or voltage surges, which is why this version is usually recommended for only non-critical applications and at short communication ranges.
Since many serial devices with a RS, RS or RS port are still in use and even still produced today, the disappearance of the serial COM port from personal computers has created a need for the USB to serial adapter.
However, the characteristics of the virtual COM port are not exactly the same as a real internal COM port, mainly due to data latency ; which means that if very sensitive and precise data transfer is required, the USB to serial adapter might be unreliable and not a desired solution. Please help improve this article by adding citations to reliable sources.
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