We recommend the use of a USB 2. The Advanced Options dialog box displays. These products comply fully with USB Specification version 2. The half-duplex operation is the same as in the AutoToggle mode, except that the RTS signal is used to control the transmit drivers instead of the automatic control. Options for each serial port can be individually controlled. Any damage that results from improper installation, operation, or general misuse voids all warranty rights. The Port Settings dialog box displays.

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Quatech DSU2-400 – Serial adapter – USB 2.0 – RS-232/422/485 x (DSU2-400)

Each UART’s transmit drivers are always active in rsu2 mode. However, there may be slight differences in store pricing or inventory compared to what is listed online. Indicates whether Microsoft has approved this version. Thank you for signing up!

A typical null modem cable is also shown in the figure. This driver is fully compatible with dsuu2 following versions of Windows: The Choose your search and installation options prompt displays.

Quatech DSU2-400 – Serial adapter – USB 2.0 – RS-232, RS-422, RS-485 – 2 ports

The following table lists the serial port connector definitions. Check all cables to make sure that they connected correctly.


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Select this choice when only transmit and receive data signaling is required. Please complete the following information and retain for your records. If necessary, you can also select Specify a location: This download link is for the driver version 7.

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Quatech Warranty provided by: Disclaimer The information in this manual is believed to be accurate and reliable at the time of posting. The Locate driver files prompt displays. Coupons are not applicable to prior orders.

400 others trademarks and copyrights mentioned herein are the property of their respective owners. If necessary, you can also select the Include this location in the search: Each port’s AuxIn signal pair is looped back to its AuxOut signal pair at the connector. Only download this driver. Sign up to get insider deals first, exclusive promotions and more delivered to your inbox each week.


Quatech DSU – Serial adapter – USB – RS// x (DSU) at

The ports associated with the USB-toSerial adapter should appear in the list of ports. Table 1 – Device port and connection options Note: Double check the Device Manager per the instructions in Using Device Manager to ensure that drivers are installed correctly and that all devices are working properly.

Get a 4-terabyte USB 3.

Make sure that each cable is securely 1. From the Control Panel, select System. Page 22 Rev 1. You can set the connector signal selection, the duplex mode, and the receiver control.

This section explains how to install the USB-to-Serial adapter under different operating systems.