Tripp Lite U209-008 Making external connections, Uninstalling under Windows 2000 or Windows XP

Installing the USB-to-Serial Adapter (continued)

Uninstalling under Windows 2000 or Windows XP

Follow these steps in the event that you need to uninstall or reinstall the USB-to-Serial software.

1.From the Control Panel, select System.

2.Press the Hardware tab.

3.Click on Device Manager.

4.Scroll down to Multi-port serial adapters and expand.

5.Highlight your USB-to-Serial adapter; for example, U209-004 or U209-008

6.Select the Action menu option.

7.Select Uninstall from the drop down menu.

8.Click OK at the Confirmation screen. Note that this also removes all the serial ports associated with your USB-to-Serial adapter.

Making external connections

RS-232 Serial Connections

RS-232 devices are classified by their function as either Data Terminal Equipment (DTE) or Data Communication Equipment (DCE).

Note: A DTE device is the communication source. A DCE device provides a communication channel between two DTE-type devices.

Figure 11 - DB9 connector pinout.

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.

RS-232 signal description	DB-9
Data Carrier Detect (DCD)	1
Receive Data (RxD)	2
Transmit Data (TxD)	3
Data Terminal Ready (DTR)	4
Signal Ground (GND)	5
Data Set Ready (DSR)	6
Request To Send (RTS)	7
Clear To Send (CTS)	8
Ring Indicator (RI)	9

DTE- and DCE-type devices have complementary pinouts that allow terminals and modems to connect directly using a one-to-one cable as shown in Figure 13. Two DTE-type devices can be connected by a null modem cable. A typical null modem cable is also shown in the figure.

Note: In many applications, DCEs are unnecessary. This allows you to use a null modem cable (modem eliminator cable) to directly connect two DTE type devices.

Figure 12 - Use of DTEs and DCEs in a

communication link.

Cabling requirements for RS-232C devices

Figure 13 - illustrates the RS232 pinouts for typical DTE- to-DCE and DTE-to-DTE cables with 9-pin connectors.

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