Actisense OPTO-4

Tiny Case Design

All circuitry is contained within a robust standard D-type 9 pin connector for the optimal design size and cost. The case is also fully shielded and connected to the cable shield.

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 Output

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. Actisense Mulitplexter) and also send NMEA 0183 data back to the same NMEA device.

Fully NMEA 0183 Compliant

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


The adapter cable's internal circuitry is port-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. Cable is also shielded to create a superior noise rejection solution.


Manufacturer: Actisense
Product: Actisense OPTO-4
Category: NMEA data interconnection / Buffering