Tripp Lite USB to Serial Adapter User’s Manual

Making external connections

Making external connections

RS-232 serial connections

The Tripp Lite USB to Serial Adapter comes with standard male DB- 9 connectors. The figure below shows the pin designations.

Figure 37 - RS-232 DB-9 pin designations

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

Figure 38 - Use of DTEs and DCEs in a communication link

Figure 38 illustrates role of DTE and DCE devices in a communications link.

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

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.

Tripp Lite’s 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.

Table 2 - RS-232 DB-9 signal definitions

RS-232 signal

DTE connection

description

DB-9

Data Carrier Detect (DCD)

1

 

 

Receive Data (RxD)

2

Transmit Data (TxD)

3

Data Terminal Ready (DTR) 4

 

 

Signal Ground

5

Data Set Ready (DSR)

6

Request To Send (RTS)

7

 

 

Clear To Send (CTS)

8

Ring Indicate (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 39.

See Figure 39 on the following page for a typical null modem cable.

Rev 2.0 (5/30/2003)

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Tripp Lite U209-004 user manual Making external connections, RS-232 serial connections
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U209-004 specifications

The Tripp Lite U209-004 is an innovative USB hub designed to enhance connectivity for various devices while ensuring optimal performance. This compact and efficient device grants users the ability to expand their USB connection options effortlessly. With four USB 2.0 ports, the U209-004 accommodates multiple devices, allowing users to connect a variety of peripherals simultaneously, including keyboards, mice, printers, and external storage solutions.

One of the standout features of the U209-004 is its plug-and-play capability, which means that users can set it up without the need for additional drivers or complicated installation processes. Simply connecting it to a USB port on a computer or laptop instantly provides additional connectivity options. This ease of use makes it an ideal solution for both tech-savvy individuals and those who prefer straightforward setups.

The design of the Tripp Lite U209-004 is both compact and portable, making it perfect for on-the-go use. Whether at home, in the office, or while traveling, users can easily pack this lightweight hub without taking up significant space. Built from durable materials, it promises reliability and longevity, ensuring that it can withstand regular usage and transport.

In terms of technology, the U209-004 supports data transfer speeds of up to 480 Mbps, which is sufficient for most everyday applications such as transferring files or syncing devices. It also maintains backward compatibility with USB 1.1 devices, ensuring that older peripherals can still be utilized without compromising performance.

Furthermore, the Tripp Lite U209-004 incorporates built-in overcurrent protection for each port, safeguarding connected devices against power surges and potential damage. This feature enhances its utility and contributes to the overall reliability of the hub, making it a safe choice for users who connect a variety of devices.

Overall, the Tripp Lite U209-004 combines functionality, reliability, and portability, making it an excellent addition to any office setup or personal device collection. Its ability to expand connectivity options and its user-friendly design are significant benefits, catering to the needs of diverse users in today's tech-driven world. Whether enhancing productivity at work or supporting leisure activities at home, the Tripp Lite U209-004 proves to be a valuable asset.
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