Quatech DSU2-100 User Manual
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Quatech DSU2-100 User Manual

Usb-to-serial adapter
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CONNECT WITH
RELIABILITY
USB-to-Serial Adapter
User's Manual
SSU2/DSU2/QSU2/ESU2 - 100/400
1-, 2-, 4-, and 8 serial ports
QUATECH, INC.
5675 Hudson Industrial Parkway
Hudson, Ohio 44236-5012
Toll free: 1-800-553-1170
TEL: (330) 655-9000
FAX: (330) 655-9010
http://www.quatech.com.
SSU2/DSU2/QSU2/ESU2-100/400
User's Manual P/N: 940-0191-101

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Summary of Contents for Quatech DSU2-100

  • Page 1 CONNECT WITH RELIABILITY USB-to-Serial Adapter User’s Manual SSU2/DSU2/QSU2/ESU2 - 100/400 1-, 2-, 4-, and 8 serial ports QUATECH, INC. 5675 Hudson Industrial Parkway Hudson, Ohio 44236-5012 Toll free: 1-800-553-1170 TEL: (330) 655-9000 FAX: (330) 655-9010 http://www.quatech.com. SSU2/DSU2/QSU2/ESU2-100/400 User’s Manual P/N: 940-0191-101...
  • Page 2 Copyright Copyright © 1998 - 2007, Quatech, Inc. All rights are reserved. The information contained in this document cannot be reproduced in any form without the written consent of Quatech, Inc. Any software programs that might accompany this document can be used only in accordance with any license agreement(s) between the purchaser and Quatech, Inc.

  • Page 3: Table Of Contents

    Using Device Manager--------------------------------------------------------------------------------------------------------15 Accessing Device Manager ---------------------------------------------------------------------------------------------15 Exploring Device Manager screens ----------------------------------------------------------------------------------15 Windows XP and 2000 ---------------------------------------------------------------------------------------------15 Setting advanced options -----------------------------------------------------------------------------------------------21 Operating Mode (MEI adapters only) -------------------------------------------------------------------------21 Receiver active… (MEI adapters only) ------------------------------------------------------------------------22 AuxOut/AuxIn (MEI adapters only)----------------------------------------------------------------------------23 Low-Latency Mode --------------------------------------------------------------------------------------------------23 Troubleshooting-----------------------------------------------------------------------------------------------------------------24...
  • Page 4 Table of Contents Quatech USB-to-Serial Adapter User’s Manual Figures Figure 1 - Windows XP Found new hardware prompt... 3 Figure 2 - Windows XP Choose your search and installation options prompt ... 4 Figure 3 - Windows XP Searches drivers prompt... 5 Figure 4 - Windows XP Wizard installs the software ...

  • Page 5: Introduction

    System requirements Rev 1.01 (February 2007) This User’s Manual describes how to setup and install your Quatech USB-to-Serial Adapter. The Quatech SSU2-100, DSU2-100, QSU2-100 and ESU2-100, respectively, provide one, two, four and eight independent RS-232 serial interfaces to the host PC via the Universal Serial Bus (USB) port.

  • Page 6: Features

    Table 2 - LED codes LED color Green Quatech offers an IND option, or surge-suppression board upgrade, to provide improved performance and industrial-grade reliability. The IND option provides essential protection for reliable use in an industrial environment. Each communication line has a surge suppressor capable of sustaining up to 40-A, 20-μs peak transient...

  • Page 7: Installing The Usb-To-Serial Adapter

    USB-to- Serial adapter. Step Procedure Step 4 Insert the Quatech installation CD into your CD-ROM drive. Step 5 Select the “Advanced” option. Click the Next button. Rev 1.01 (February 2007) This section explains how to install the USB-to-Serial adapter under different operating systems.

  • Page 8: Figure 2 - Windows Xp Choose Your Search And Installation Options Prompt

    Include this location in the search: option and browse to the location with the USB-to-Serial drivers. The complete path is E:\Serial Port Adapters\Drivers\Windows 98, Me, 2000, XP for USB. Replace E:\ with your CD-ROM designation Windows searches for drivers for the adapter.

  • Page 9: Figure 3 - Windows Xp Searches Drivers Prompt

    Figure illustrates Windows Searches drivers prompt. When Wizard finds USB-to- Serial drivers, this screen disappears. Step Procedure Step 8 The Wizard locates and starts to install the necessary software. Rev 1.01 (February 2007) Figure 3 - Windows XP Searches drivers prompt Description The Wizard installs the software prompt displays, followed by the Finished...

  • Page 10: Figure 4 - Windows Xp Wizard Installs The Software

    Figure 5 shows the Windows Finished installing prompt. It indicates that the adapter has been successfully installed. Step Procedure Step 11 Press the Finish button to continue. Page 6 Figure 4 - Windows XP Wizard installs the software Figure 5 - Windows XP Finished installing prompt Description The USB adapter installation is complete.

  • Page 11: Installing Under Windows 2000

    Installing under Windows 2000 Step Procedure Step 1 Turn on the power to your computer system. Step 2 Plug the wide flat end of the USB cable into the downstream connector. Step 3 Plug the square end of the USB cable into the back of the USB-to-Serial adapter.

  • Page 12: Figure 7 - Windows 2000 Search For Or Display Drivers Prompt

    Figure 7 shows the Windows 2000 Search for or display drivers prompt. Step Procedure Step 5 Insert the Quatech installation CD into your CD-ROM drive. Step 6 Select Search for a suitable driver for my device (recommended) Step 7 Click the Next button.

  • Page 13: Figure 9 - Windows 2000 Finished Searching For Driver Files Prompt

    If necessary, you can also select Specify a location: and browse to the desired location with the USB-to-Serial drivers. The complete path is E:\Serial Port Adapters\Drivers\Windows 98, Me, 2000, XP for USB. Replace E:\ with your CD-ROM drive designation. Windows searches for drivers for the adapter.

  • Page 14: Figure 10 - Windows 2000 Finished Installing Prompt

    Figure 10 is the Windows 2000 Finished installing prompt. It indicates that the adapter has been successfully installed. Step Procedure Step 14 Press the Finish button to continue. Page 10 Figure 10 - Windows 2000 Finished installing prompt Description The USB-to-Serial adapter installation is complete.

  • Page 15: Uninstalling Under Windows 2000 Or Windows Xp

    3. Click on Device Manager. Figure 11 – Device Manager 4. Scroll down to Multi-port serial adapters and expand. 5. Highlight your Quatech USB-to-Serial adapter; for example, 6. Select the Action menu option. 7. Select Uninstall from the drop down menu.

  • Page 16: Making External Connections

    Terminal Equipment (DTE) or Data Communication Equipment (DCE). Figure 13 - Use of DTEs and DCEs in a communication link Quatech USB-to-Serial adapters are DTE devices that connect to peripheral equipment through a male DB-9 connector. The following table lists the serial port connector definitions.

  • Page 17: Rs-422/485 Serial Connections

    A typical null modem cable is also shown in the figure. Figure 14 - Cabling requirements for RS-232 devices Quatech USB-to-Serial adapters provide four differential communication signals (either RS-422 or RS-485) per channel. Transmit Data (TxD) and Auxiliary Output (AuxOut) are the two output signals.

  • Page 18: Testing Db-9 Serial Ports In Hyperterminal

    Testing DB-9 serial ports in HyperTerminal Running Hyperterminal Step Procedure Step 1 Attach the loopback connector to the DB-9 connector. Step 2 Launch HyperTerminal. Step 3 Create a new session. Step 4 Select the COM # associated with port 1 from the drop down list.

  • Page 19: Using Device Manager

    Use the Ports (COM & LPT) device group property box to view and set the port settings and to view device usage and driver information for the serial ports. Use the Multi-port serial adapters device group property box to view and set the advanced options and to view device usage and driver information for the USB-to-Serial adapter.

  • Page 20: Figure 15 - Windows Xp/2000 Device Manager Properties, General Tab

    Figure 15 illustrates the Windows XP/2000 General Tab, which tells you whether the USB-to-Serial adapter is working properly. Step Procedure Step 3 Click the USB Serial Ports Advanced Options tab to view the port setting properties. Page 16 Figure 15 - Windows XP/2000 Device Manager properties, General tab Description The Advanced Options dialog box displays.

  • Page 21: Figure 16 - Windows Xp/2000 Rs-232/422/485 Advanced Options Dialog Window

    Quatech USB-to-Serial Adapter User’s Manual Figure 16 - Windows XP/2000 RS-232/422/485 Advanced Options dialog window Figure 16 illustrates the Advanced Options dialog for MEI devices. Figure 17 - Windows XP/2000 RS-232 Advanced Options dialog window Figure 17 illustrates the Advanced Options dialog for RS-232-only devices.

  • Page 22: Figure 18 - Windows Xp/2000 Usb Serial Port, Port Settings Box

    Step Procedure Step 4 The RS-232 USB Serial Port Advanced Options dialog box displays the firmware revision of the USB-to-Serial adapter and lets you enable or disable the low-latency mode for each serial port. The RS-422/485 Advanced Dialog box also lets you set the connector signals selection and the duplex mode, and receiver control.

  • Page 23: Figure 19 - Windows Xp/2000 Usb Serial Port, Advanced Settings Box

    Step Procedure Flow control Step 10 Press the Advanced button. Step Procedure Step 11 Use the drop down box to select the port whose settings you wish to change. Click Cancel to return to the Port Settings tab. Step 12 Click the Driver tab to view the driver information and update the driver.

  • Page 24: Figure 21 - Windows Xp/2000 Usb Serial Port, Driver File Details Box

    The Driver File Details dialog box opens. See the following figure. Figure 21 - Windows XP/2000 USB serial port, Driver file details box Description Quatech is the provider. This is the version of the installed software. Indicates whether Microsoft has approved this version.

  • Page 25: Setting Advanced Options

    Setting advanced options Operating Mode (MEI adapters only) RS-232 (default) Note: The serial port’s LED will glow red in RS-232 mode. RS-422/485 Full Duplex (4-wire) Note: The serial port’s LED will glow green in RS-422/485 mode. RS-422/485 Half Duplex (2-wire) Auto-Toggle Note: The serial port’s LED...

  • Page 26: Receiver Active

    RS-422/485 Half Duplex (2-wire) DTR control Note: The serial port’s LED will glow green in RS-422/485 mode. Receiver active… (MEI adapters only) Always (default) Only when not transmitting Page 22 This mode configures the serial port to use an RS-422/485 electrical interface.

  • Page 27: Auxout/Auxin (Mei Adapters Only)

    AuxOut/AuxIn (MEI adapters only) Loopback (default) Note: In half-duplex (2-wire) modes, UART’s output is looped back to its CTS input. RTS/CTS Low-Latency Mode Unchecked (default) Checked Note: In low-latency mode, the overall throughput device is reduced, especially when multiple serial ports are operating together.

  • Page 28: Troubleshooting

    The USB port is faulty. Page 24 This section lists some common problems and their causes. If the information below does not provide a solution, contact Quatech technical support. Solution Check all cables to make sure that they are connected correctly.

  • Page 29: Appendix

    Appendix A Specifications Bus interface Baud rates Ports UARTs Transceivers: SSU2-100 DSU2-100 QSU2-100 ESU2-100 Transceivers: DSU2-400 QSU2-400 ESU2-400 Rev 1.01 (February 2007) USB Specification 2.0, high speed 480 Mbps. Backward compatible with USB 1.1 full speed 12 Mbps. Up to 921,600 bps.
  • Page 30 Connectors Dimensions Power Requirements Temperature: Humidity OS Support Page 26 DB-9 Male 3.6” L x 1.7” W x 1.0” H (SSU) 9.18” L x 5.25” W x 1.675” H (DSU/QSU) 9.18” L x 5.25” W x 2.363” H (ESU) USB bus powered (no external power connection required) Suspend Power: <...

  • Page 31: Appendix

    Quatech, Inc. warrants the SSU2/DSU2/QSU2/ESU2-100/400 to be free of defects for five (5) years from the date of purchase. Quatech, Inc. will repair or replace any board that fails to perform under normal operating conditions and in accordance with the procedures outlined in this document during the warranty period.

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