USB-IIRO4-2SM - IO Products

USB 4-port hub internally to provide four optically isolated digital inputs, four digital electromechanical relay outputs and two ports of RS-232/422/485 serial communication in a small rugged enclosure with DB25 connector for digital and two DB9 connectors for serial.


  • Multifunction I/O adapter for USB 1.1 and 2.0 port hosts
  • Four optically isolated digital inputs
  • Four Form C electromechanical 1A relays
  • Two serial ports, field selectable RS-232/422/485
  • Small (4"x4"X1.8") rugged industrial enclosure
  • PC/104 module size and mounting compatibility
  • All required power drawn from USB port, no external power adapter required
  • Expansion USB hub port connector

  • Ordering Guide

    USB-IIRO4-2SMUSB Isolated I/O and Serial Communication Board
    For 3rd parties memory module comparability, also check (CMTL Advanced Tested Memory List)
    *Specifications are subject to change without notice.
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