Have you had difficulty using a USB to RS-232 adapter to connect your RS-232 device to a computer? If so, you are not alone.
Our customers frequently encounter issues with these adapters. In this article, I’ll briefly discuss the origin of these issues and provide you with some suggestions for successfully handling them.
The Evolution from RS-232 to USBIn the old days of personal computers, one of the primary connections available was the RS-232 serial port. Apart from the parallel port, it was the primary means to connect an external device.
The connector was reduced from a 25-pin connector to a 9-pin connector, but RS-232 ports remained present on every computer for many years. Built-in RS-232 ports featured direct mapping to memory and worked at a high priority. Data practically flowed directly to and from the software that was accessing the serial port.In 1996, the Universal Serial Bus (USB) standard was introduced as a replacement for the serial connector and other connector types that were typically found on the back of computers. The USB provided smaller connectors and more data throughput than the serial and parallel interfaces it replaced.USB devices have high throughput, but they use a shared data bus.
Data is wrapped up and transferred in packets. To handle the packets and move data in and out of the program accessing the USB device, a software driver is needed. The software driver sits between the hardware and the computer program you are using, and it must be installed and working correctly.
The Necessity of an AdapterWith the widespread adoption of USB, most computers sold now do not have an RS-232 port. Therefore, to connect an RS-232 device (such as a ) to a computer, you need to use a USB to RS-232 adapter, such as the.While USB to RS-232 adapters perform a necessary function, they do have some limitations. For example, there are three types of problems that you may encounter when using a USB to RS-232 adapter:. Driver issues.
Hardware issues. Performance issuesIssue #1: DriverThe most common problem that our customers encounter with a USB to RS-232 adapter is getting the proper driver installed.
The driver must correspond to the chip inside the cable—not to the manufacturer of the cable.For USB to RS-232 chips, there are two primary manufacturers: Prolific and FTDI. Because off-brand chips with poor drivers are unreliable, Campbell Scientific recommends and currently sells a cable using an FTDI chip. We chose this cable because it uses a chip that has a certified driver available on Windows Update. (The older cables were silver in color and did not have a driver available for Windows beyond version 7.)Tip: Test your USB adapters in the office with your field computer. When you are in the field, your computer won’t have an Internet connection to automatically download and install the driver.If the driver for your adapter is not automatically installed or cannot be installed from a CD, you will need to identify the chip in your cable and locate the driver on the Internet. Some manufacturers identify on their packaging which chip is used inside their cable. You can also identify a cable’s chip from the Windows Device Manager by following these steps:.
Usb Serial Cable Ce Fcc Driver License
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Surpac crack keygen pes. In the Windows Device Manager, right-click your device from the list. In the drop-down menu that opens, select Properties.
In the Properties dialog box, select the Details tab. In the Property field, select Hardware Ids from the drop-down menu. In the Value field, there is both a VID (Vendor ID) and a PID (Product ID).
These IDs respectively indicate the manufacturer and the model number of the chip. In the example above, I did a quick Internet search for VID 0403 PID 6011, which revealed to me that the chip is an FT4232 manufactured by FTDI. After you know your chip type and manufacturer, you can locate and download the correct driver for your version of Windows.Issue #2: HardwareUSB to RS-232 adapters are commodity pieces of computer equipment.
Standards. USB 1.1Interface. 1 x USB Type A.
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1 x RS-232 (9-pin) maleData Rate. Up to 6 MbpsSupported OS.
Windows ® 10, 8.1, 8, 7. Mac OS ® 10.11, 10.10, 10.9, 10.8, 10.7, 10.6Operating Temperature. 0 – 40 °C (32 – 104 °F)Operating Humidity. Max. 85% non-condensingPower. USB poweredPower Consumption. 500 mA (max.)Dimensions.
52 x 35 x 15 mm (2 x 1.3 x 0.6 in.). 540 mm (21 in) cable lengthWeight. 40 g (1.4 oz.)Warranty.
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2 year limitedCertifications. CE.
Ftdi Usb To Serial Adapter
FCCPACKAGE CONTENTS. TU-S9. Quick Installation Guide. CD-ROM (Drivers).