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Keyspan USA-49WG owner manual Keyspan Serial Assistant

Models: USA-49WG

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5.1 – Keyspan Serial Assistant

There are 3 types of tests:

TX Only: Use this test to test only the transmit (Tx) signals of the Keyspan adapter.

Ext. LoopBack: Use this test for sending and receiving data. This test sends data out the selected serial port and waits to receive it via a special Loopback connector. You can find more information about this special Loopback connector in the Serial Port Pin Outs section in this manual.

Int. LoopBack: Use this test for sending and receiving data. This test is performed within the Keyspan adapter hardware. This test DOES NOT require a special Loopback cable.

The Test Type box allows to specify how many times the selected test will be repeated when you press the Test button. Use the Quick option to perform the test once. To perform a subsequent test, press the Test This Port button. Use the Continuous option to repeat the test continuously. To stop the test, press the Stop Test button (the Test This Port button becomes the Stop Test button during a test).

The Test Speed pull down menu allows to specify the speed (baud rate) at which the port will be tested at when you press the Test This Port button.

The Test Status box reports the test status or results of the selected COM port.

The Receive FIFO Buffer Size pull down menu allows you to configure the number of characters which are stored in the card’s “First In First Out” input buffer (“FIFO”) before they are made available to the computer. The default value of this parameter is “16”. The Receive FIFO improves the reliability of data transfer at high speeds. You can turn this option OFF for performance reasons however this is not necessary in most cases.

The Enable Remote Wakeup check box allows you to specify if you want your computer to ‘wake up’ from SLEEP/ SUSPEND mode.

Remote wakeup is provided via the RI (ring indicator) pin (see the Serial Port Pin Outs appendix of the device).

Note: Remote Wakeup is enabled on a per-port basis.

The Update Configuration button updates the Keyspan adapter with the changes you have made in the Properties tab. Please note that these changes will take effect when you click the Update Configuration button.

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Keyspan USA-49WG owner manual Keyspan Serial Assistant
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USA-49WG specifications

The Keyspan USA-49WG is a versatile and highly regarded USB to serial adapter, designed for efficient and reliable connectivity between USB-equipped computers and serial devices. This device is particularly popular among users who work with older serial technology or need to connect to various serial interfaces.

One of the standout features of the USA-49WG is its ability to support multiple serial connections through a single USB port. Equipped with four serial ports, this adapter allows users to connect several legacy serial devices simultaneously, making it an ideal solution for applications that require multiple connections, such as industrial automation, data logging, and point-of-sale systems.

The USA-49WG utilizes FTDI's FT232R chip, which is known for its high performance and compatibility. This chipset ensures that the adapter achieves excellent data transfer rates, with support for baud rates up to 115200 bps. This makes the Keyspan USA-49WG suitable for a range of applications that require fast and reliable communication.

Another key characteristic of the Keyspan USA-49WG is its plug-and-play functionality. Users can easily connect the device to their USB port, and it will automatically install the necessary drivers on major operating systems, including Windows, macOS, and Linux. This ease of use significantly reduces setup time, allowing users to focus on their projects without the hassle of complicated installation processes.

In terms of design, the USA-49WG is built with a compact and robust housing, providing durability for both home and industrial use. Additionally, it features LED indicators for power and data transmission, allowing users to monitor activity at a glance.

The adapter also includes a comprehensive set of features to enhance usability, such as:

- 128-byte transmit/receive FIFO buffers for efficient data handling,
- Support for RS-232 serial communication standard,
- Full-duplex communication capabilities, ensuring simultaneous data transmission and reception.

In conclusion, the Keyspan USA-49WG USB to serial adapter stands out for its multi-port functionality, ease of installation, and robust performance. It provides an excellent solution for connecting modern USB-equipped systems to legacy serial devices, making it an essential tool for various professional and home applications. Its combination of features and technologies makes it a reliable choice for those in need of seamless serial connectivity.