In-line USB to Serial Converters

€65.47 ex.VAT
  • Manufacturer: Advantech B+B SmartWorx
  • Product Code: USPTL4 | USPTL4-LS | USOPTL4 | USOPTL4-LS
  • DRIVERS: click to download
  • DATA SHEET USPTL4/LS USOPTL4/LS: click to download pdf
  • INSTALLATION GUIDE USPTL4/LS USOPTL4/LS: click to download pdf
  • DRIVER INFORMATION: click to download pdf

Available Options

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In-line USB to Serial Converters

USPTL4 USB To 422/485 With Pluggable Term Blocks And LEDS  €65.47

USPTL4-LS USB To RS-422/485 TB , LEDS - Locked Serial #  €63.56

USOPTL4 USB To Isolated 422/485 W/Plug Term Block And LEDS  €103.88

USOPTL4-LS USB To Isolated 422/485 TB , LEDS- Locked Serial #  €100.85

Compact & Field Service Friendly 

These compact, isolated USB to RS-422 and RS-485 converters allow you to add an asynchronous serial port to your USB only PC. The built in 2 kV isolation protects your port from dangerous ground loops. They are perfect for connecting to remote devices or programming ports in field service applications. They are USB 2.0 compatible. 

Model USOPTL4 is the RS-422 and RS-485 version and supports data rates up to 460.8 Kbps. RS-485 2-Wire and 4-Wire modes are selected using a DIP Switch. If you don’t need isolation, use model USPTL4. 

Windows operating systems up to Windows 8 (32 and 64 bit) are supported. The USOPTL4 is equipped with our signature high retention USB port. The RS-422/485 versions have a removable terminal block.

Connect to Asynchronous Serial Diagnostic & Programming Ports with your USB only PC

To better support field service pools, we created "LS" versions of these popular converters. Simply put, "LS" stands for "Locked Serial Number." Units that are programmed with the "locked serial number" are field service friendly in that they all share the same serial number.

This feature allows for a single driver installation - if you plug another "LS" version of the same model number into your PC, it will be assigned to the same COM port. With the standard version each time you install a product with the same model number, you must go through the driver installation and it will be assigned to a unique COM port.


Operating System Support for all models: Windows 2000, XP (32 / 64 bit), Vista (32 / 64 bit), Windows 7 (32 / 64 bit), Windows 8 (32/64 bit), 2003 and 2008 Server (32 / 64 bit).


Operating Temperature: 0 to 70 C
Isolation: 2 kV (USOPTL4)
Power: USB Bus Powered (less than 100 mA)
USB Connector: Type B
RS-422, RS-485 Connector: Removable Terminal Block
Modes: RS-422, RS-485 (2-Wire), RS-485 (4-Wire)
Data Rate: 460.8 Kbps
USB Compatibility: USB 2.0 at 12 Mbps
Emissions: FCC Class B, CISPR Class B (EN55022)
CE: Light Industrial EN61000-6-1