![]() ![]() ![]() When the cable is plugged into Windows 7 or higher computers, the necessary driver should load automatically. Drivers don’t load correctly, or the cable cannot be seen in Device Manager Other problems can include using an improper cable, incorrect port settings, or a basic incompatibility between the Plugable USB serial adapter and the device it is being connected to. A frequent problem is that the software that is necessary to connect to the device does not work under modern operating systems such as Windows 7 or above. Although this usually works well, a number of problems can crop up because many of the devices people want to connect are older devices with various issues. The Plugable USB serial adapter allows you to connect legacy devices that use RS232 serial communications to computers that do not have a serial port. Originally authored by: David Roberts, December 9, 2013 Follow the on screen prompts to install the Prolific serial drivers and when completed the serial adapter should be assigned a COM port number.Now extract the contents of the zip file downloaded in step #1, navigate into the extracted files and double-click on "PL23XX-M_LogoDriver_Setup_40100_20230307.exe" to start the installtion process.Repeat steps 5-7 until the "Ports (COM & LPT)" section shows "USB-Serial Controller D" with an error icon to the left.When completed, right-click on any entry in the Device Manager and select "Scan for hardware changes".Check the box to delete the drivers and then click on the "Uninstall" button to proceed.Right-click on the entry "Please install corresponding PL2303 driver to support WIndows 11 and further OS." and select "Uninstall device".Open the Device Manager (right-click) on the Start Menu and select "Device Manager".Connect the USB to Serial adapter to the computer.zip file to the Desktop or Download folders Download the driver v4.0.10.0 and save the.Increasing the baudrate will also increase the probability of noise induced.Prolific has not yet released a Windows 11 driver for the PL2303HXD chipset used in our USB to Serial Adapter, in the meanwhile we can install an older driver to enable this adapter on Windows 11 systems by performing the following: You will notice that the probability of these garbage generated is lesser or none. These mis-triggered bytes received on the Rx channel are the noise induced from the Tx line. The disturbance noise triggered the receiver circuit thinking that a valid physical RS232 signal is received. These garbage data are signal from the Tx wire coupled onto the Rx wire. Transfer a string of bytes into the Tx wire and observed the garbage bytes returning from the Rx wire. Setup the baudrate to 19200bps (with hardware handshaking). Have the wire twisted or tape up so that the gap between the wires are as small as possible. Set up 3 wires (Tx, Rx, Gnd) of 30m to 50m distance between two RS232 devices (or computer). You can easily do an experiment to see the effect noise induced on adjacent wire. RS232 Cable Length to Data Baud-rate table reference guide ![]() If you really want to stretch the cable length further, ensure that you get yourself a high quality RS232 cable and also use a better serial data protocol to detect data corruption and do the necessary data re-transmission. To be safe, it is better to have a margin factor of 2. The material and the construct of the cable also plays a part in the length of the cable. Please note that this is only a general guide. The following table is a general guide to the cable length base on the baudrate. Shorter length will keep the capacitance lower which makes it harder for the higher frequency signal to coupled over to the adjacent cable. The insulation between wires is capacitance which high frequency signal can easily pass over. To reduce the effect of induced noise from the adjacent wire, the length is keep shorter. The noise can be in the form of garbage data on the adjacent data wire. This baud-rate is low and the cable length distance can be up to about 150 meters (about 500ft).Īs the speed of data transmission increases on the cable, the physical signal of the data can easily coupled onto the adjacent wire. ![]() The RS232 often uses a data baud-rate of 9600bps. ![]()
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