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IUSB44T-B6AB - Opto-Isolated USB to RS485 / RS422 Bidirectional Serial Converter


Product Description

IUSB44T: Opto-Isolated USB to RS485(Bidirectional 2-Wire Half Duplex) or RS422(4 wire Full Duplex) Serial Converter w/ 6ft. USB A-B Cable in Boxed Enclosure. 

  • This 3KV opto/galvanic isolated auto transmit unit, features bi-directional serial conversion from USB to RS485(2 wire half duplex), or RS422(4 wire full duplex).
  • A group of jumpers enable the user to customize this device as an RS485 or RS422 converter. and configure the transmit and receive bias and termination resistors. Refer to the schematic for details.

  • Optimized for isolated indoor/outdoor point to point or multi-drop systems. We recommend this unit for outdoor sign applications. For indoor, or protected installations, the non-isolated USBA4 and USB44T are good choices. 

  • Transparent to all standard asynchronous formats and data rates supported by the USB interface up to 921.6 Kbps. No jumpers or settings required. 

  • In RS485 mode, fast auto turn-around, from transmit to receive mode, requires no software delays and eliminates timing problems and data collisions. We pioneered and perfected this leading edge technology.

  • The SP491EEP driver allows 32 standard loads at 4000 ft. at data rates up to 921.6 Kbps. It has high ESD tolerance as one of the many protection features we have built into this unit.

  • 3KV opto/galvanic isolation, isolation resistors, comm fuses and a transcient suppressor bridge complete a protection package that helps insulate the device from common destructive electrical noise.

  • Edge mounted LEDs display power and data activity at the USB and RS485/RS422 interfaces.

  • Broad environmental range. Temperature: 0C to +70C(32F to +158F). Humidity: 10 to 90% RH(non-condensing)

  • User connections are a USB type B receptacle, and a 6 position removable screw terminal strip for the RS485/RS422 port. There is no external power connector. Device power is obtained through the USB port.

  • Four(4) easy mount through hole standoffs, which accept #6 hardware, are provided on the circuit board.

  • The required "Virtual Com Port" USB driver, for the host computer, is available from under "Drivers". This web site provides drivers for most host operating systems. Some OS's will automatically search for, find, and install the appropriate software/driver. 

  • Accessories and options are an enclosure, a USB cable(6 ft USB type A plug to USB type B plug), and conformal coating. Contact us for options help.

  • We feature a family of other similar USB isolated/non-isolated converters that may fit your needs. Check out the USBA4, USB44T, and IUSB24AT.

  • R E Smith Inc makes a wide variety of isolated converters that address the electrical noise problems that contribute to unreliable communications, and product failure.  If what you see here is not exactly what you need, don't hesitate in calling us at 513-874-4796.

  • We also have a new series of Converters and Repeaters that extend the RS485 communications distance far beyond conventional limits. Contact us for information on these leading edge problem solvers.

  • WARNING: Do NOT connect this device to  a telephone system under any circumstances. Damage could result to the circuit board and/or your telephone system.

Click here for more information about the IUSB44T USB to RS485 Bidirectional Half Duplex or RS422 Full Duplex Converter!
Questions? Call: 513 874-4796

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