NMEA to RS232 Opto-isolator

The OPTO-1 is no longer in production. Please see the current OPTO-4 for the most advanced serial adaptor cable...





Tiny Case Design

All circuitry is contained within a robust standard D-type 9 pin connector for the optimal design size and cost.

Galvanic OPTO-Isolated NMEA 0183 Input

Isolates the NMEA 'talking' device supplying the data from the attached equipment's receiver (computer or radar etc.). This prevents the potentially damaging voltage or current spikes present in the electrically noisy environment of the vessel's wiring network from reaching the attached equipment's receiver, and also stops any problematic ground loops.

Alternators, motors etc. can induce or conduct very large voltage and current spikes into the vessel's cables; computer ports (serial, USB etc.) are only designed to handle low voltage and low current signals.

TransZorb Protected RS232 Input

Prevents static spikes from the NMEA 0183 network damaging the attached equipment's transmitter (computer or radar etc).

Fast Data Baud Rate

Capable of data transfer rates up to 56k Baud.

Full Duplex (two-way) Communication

Using a full 4-wire interface, the attached equipment can receive the NMEA 0183 data transmitted by the NMEA 'talker' device (e.g. depth sounder, NMEA multiplexer etc.), and also send NMEA 0183 data back to the same NMEA device.

Note: This product is effectively an 'RS422 to RS232' adapter, and so cannot be used to re-program the DST Module.

Fully NMEA 0183 Compliant

Complies with all aspects of the NMEA 0183 standard communications protocol.

The adapter cable's internal circuitry is self-powered from the RS232 (PC) serial port - no additional power supply connection is required.
Twisted Pair Cable
1.5 metres (5 feet) of high quality 4-core cable for noise interference cancellation / rejection.

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