The NMEA 0183 Range

Actisense OPTO-4 Opto Isolator

Add isolation to an RS232 port to protect against ground loops. The OPTO-4 provides a safe and low cost way of connecting an RS422 (NMEA 0183) system to an RS232 (PC COM port) system, or any other device with a standard RS232 9-pin port.

The OPTO-4 provides comprehensive galvanic OPTO-isolation to protect the PC input/receiver, plus important spike suppression to improve the PC output/transmitter protection. Initially designed for systems wishing to receive NMEA 0183 data without the risk of ground loop damage, the flexible OPTO-4 can be used to interface any RS422 and standard RS232 connection, whilst powering itself from the RS232 port, making installation simple and very quick.


  • One RS422 OPTO-isolated input
  • One RS422 (NMEA 0183) output
  • Up to 115200 baud
  • Port powered
  • Shielded cable and case


  • Protects PC input/receiver from damage
  • Water resistant cable.
  • Ruggedized over-moulded case suitable for harsh environment
  • Quick and easy to install

Product Datasheet

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Actisense OPTO-4 Opto Isolator

  • $157.63

Tags: actisense, electronics, interfaces, transducers, nmea0183, nmea2000