B&B Electronics USOPTL4 用户手册

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USxPTL4-0712ds - 1/3 
© 2006 by B&B Electronics. All rights reserved. 
pn#7157-rev003 
 
 
www.bb-elec.com  orders@bb-elec.com  support@bb-elec.com 
International Office: 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA  815-433-5100 Fax 433-5104   
European Office:  Westlink Commercial Park  Oranmore Co. Galway Ireland  +353 91 792444 Fax +353 91 792445 
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Connects PCs or laptops with USB ports to 
devices with RS-232, RS-422, or RS-485 ports. 
 
Models:  USOPTL4 and USPTL4 
Connect and Isolate an RS-422/485 
Network to your USB Port
  
 
 
Features 
• 2000 V RMS optical isolation 
• 15KV ESD surge protection 
• Adds a COM port to your PC 
• Protects against surges, spikes and ground loops 
• LEDs for transmit and receive lines 
• USB 1.0, 1.1 and 2.0 compatible (12 Mbps) 
• Automatic configuration on Windows 98, ME, 2000, XP, Vista 
• No power supply required (powered from USB bus) 
• Includes 1 meter USB cable 
 
 
 
Applications 
• Factory floor 
• Medical 
• Kiosk 
• Point of sale 
• SCADA 
 
 
Models USOPTL4 and USPTL4 are USB to one port RS-422/485 converters.  Supporting 2-wire RS-485 or a 4-wire 
RS-422/485 communications, these devices are great for any application that requires long range or multi-drop 
capabilities. Both models use pluggable terminal blocks on the RS-422/485 side and have a pair of LEDs that indicate 
data being transmitted or received. Model USOPTL4 includes special circuitry that adds 2000 volts isolation protection 
against ground loops and voltage spikes. Both products draw power from the USB port so no power supply is required. 
 
Simply plug the converter into an available USB port on your computer or USB hub and the device will show up as an 
additional COM port in the Windows Device Manager. Configured as an additional COM port, the converter is now 
compatible with your Windows applications. 
 
Universal Serial Bus (USB) has become the connectivity workhorse of today's PCs, replacing the familiar serial ports.  
But many commercial and industrial devices still use RS-422/485 interfaces. To connect these devices to modern PCs 
you need robust and reliable conversion solutions. At the same time, USB ports are becoming more common on 
commercial and industrial equipment such as point-of-sale peripherals, medical devices, scientific instrumentation, 
laboratory equipment and other devices. Sometimes these are used in environments where surges, spikes and ground  
loops are likely to occur.