Can I use the NMEA Opto-isolator for other non-NMEA uses?

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The OPTO-4 cable converts the RS422 / RS485 (NMEA) voltage levels to RS232 (PC) voltage levels. Any data type can be transferred by the OPTO-4 using these voltage levels.

An example of an alternative use is to extend an RS232 cable run beyond the normal length of 20 meters. A customer has reported that using two OPTO-4 cables connected together, a cable run of 200 metres was achieved.

Two OPTO-4 cables back to back (with the RS232 connectors at each end) will also provide bi-directional isolation.