You just easily hook the cable into PC or Hub’s port, and it can connect any RS-232 devices, such as PDA, scanner, printer etc. Bear in mind that some devices may need an additional software for proper operation. Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 2012 R2, Windows 2016, Windows 2008 R2 Introduced in 1975, the RS-422 standard was intended as a replacement for RS-232C. It used lower voltages and differential signaling to support faster data transmission, longer cable lengths and reduced RF/EMI noise. It specified the same DB25 connector as the original RS-232 standard. Parallel cables are much faster than serial cables but they are bulkier, more expensive and prone to signaling errors like crosstalk, especially over longer distances.

A USB to serial adapter that uses the FTDI chipset. The chipset manufacturer, Future Technology Devices International (FTDI), is a Scottish semiconductor company specializing in USB interfaces. The USB cable (Universal Serial Bus) is the easy-to-use, standardised connector that allows for the integration of different types of devices with a computer. A USB cable consists of four wires that are used for transferring separately power and data. A USB cable allows for communication between devices in both directions. Standard RS232 cables connect a DTE (Data Terminal Equipment) such as a desktop computer to a DCE (Data Communications Equipment), typically a modem, printer or special-purpose peripheral. These "straight through" serial cables connect pins on the sending device to the same pins on the receiving device (e.g. pin 1 to pin 1, pin 2 to pin 2 and so on). Verify RS232 device is connected to COM PORT number between 1 to 4. This is a MUST, else it will not work. Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 2012 R2, Windows 2016, Windows 2008 R2When you plug a USB to Serial Adapter like the USA-19HS into a Windows 10 machine, it should appear in the Device Manager under Ports (COM & LPT). If you do not see this heading, go to the View menu and make sure Show Hidden Devices is selected. If you still do not see your adapter, you will need to install the manufacturer's driver for your device. Connect RS232 device into any USB port on your laptop/computer. Allow 20+- seconds for Windows to attempt to install drivers automatically. However in 95% of cases, it will fail to automatically install the drivers. So you have to install drivers manually. To do so, the UART circuit is "bridged" to USB interface. The USB interface has the CDC class descriptor (Communication Device Class), and the USB host driver maps this USB device into a virtual COMnn port with nearest available number, so PC applications can use it as an usual COM port.

Baud rate is the data transmission speed measured in bits per second. It defines the frequency of each bit period. For a baud rate of 2400 (2400 bps), the frequency is 2400Hz and the bit period is 1/2400. This is the information that a receiver uses to recover the bits from the data stream. Serial ports rely on a microcontroller chip called a Universal Asynchronous Receiver Transmitter (UART) to "serialize" the data coming from the host computer's bus so it can be transmitted through the serial port. Serializing means transforming bytes of data into a sequence of bits with start and stop bits on either end. On the receiving end, another UART chip reconverts the serialized data into "parallel" bytes. Most UART chips cache data coming in from the computer bus so they can transmit faster than the normal 115 Kbps transmission rate of a standard serial port.

Some devices will only connect to your computer using a port called "RS232 Serial Port". This port was used on old computers before 2003. If install STILL failed to install the drivers or above "Prolific..." device has a yellow triangle next to it, then: Install the driver file from the disc that came with the RS232 Device. The RS-485 standard was published in 1983 and is substantially similar to the earlier RS-422 standard. The big difference is support for multiple transmitters and receivers, allowing devices connected on an RS-485 network to "talk amongst themselves" in half-duplex mode over inexpensive twisted pair cabling. RS-485 describes the electrical characteristics of the drivers and receivers but does not specify a communication protocol.

Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 2012 R2, Windows 2008 R2 Supports Windows 2000, Windows XP, Windows Vista 32/64-bit, Windows 7, Windows 10 and Mac OS 10.12.1.Since the original RS-232 standard was published in 1962, it has been revised a number of times. Each revision is given a letter suffix. The current version, TIA/EIA-232-F, was published in 1997. RS-422 was used with a smaller 8-pin mini-DIN connector on early Apple Macintosh computers to connect to AppleTalk networks and various peripherals. RS-422 is also found on professional video broadcasting equipment.