It is still common on legacy devices that use serial communications for data capture, configuration and control. The UT232R-500 provides a simple method of adapting legacy serial devices with RS232 interfaces to modern USB ports.

To read the UART data, the USB COM port driver is constantly asking the USB device for data (since it has no other means to know when the UART will receive its data and will be ready to give them to host). These signals indicate the status of Sender and Receiver (ready, busy, transmitting and receiving) and control the flow of data.Please complete the purchase (or remove the quote – don't worry it's still available in My Account) before adding these additional items. It used lower voltages and differential signaling to support faster data transmission, longer cable lengths and reduced RF/EMI noise. 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. Eaton's USA-19HS maintains the same Windows COM port number each time it is plugged in, even if moved to a different USB port. As any UART, it must be properly configured to be able to communicate with the "partner" at the other end of UART link.

However, some network switches, routers and serial devices still use a serial interface, including lab equipment, barcode readers, industrial controllers and data gathering sensors. These "straight through" serial cables connect pins on the sending device to the same pins on the receiving device (e. This versatile RS Pro Male USB A to RS232 Serial Converter operates as a bridge between one USB port and standard RS-232 Serial port. First introduced by Cannon in 1952, the D-sub form factor was adopted for the RS-232 serial communications standard.The UT232R-200 provides a simple method of adapting legacy serial devices with RS232 interfaces to modern USB ports. 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. Serial cables can also be used to connect two DTEs together but the pins must be wired so transmitter pins are connected to receiver pins. Greater distances can be achieved with a slower data rate and shielded CATx cable (see RJ45 serial adapters). Serial COM ports have been largely replaced by smaller, faster USB-A and USB-C ports on desktop PCs, laptops and peripherals.