OPTO-2 NMEA to RS232 Opto-isolator
The OPTO-2 is no longer in production. Please see the current OPTO-4 for the most advanced serial adaptor cable.
The Actisense OPTO-2 cable is an easy, safe and low-cost method of connecting an NMEA system to a laptop PC (and any other device with a standard RS232 9-pin port).
Opto-isolation provides 2000 volts of protection to the vital NMEA devices onboard, and more. Whilst protecting the most vital and expensive devices in the NMEA system, it also converts from the PC standard RS232 9-pin serial communications port to an NMEA 0183 (RS422) marine bus link.

In addition, the OPTO-2 cable and plug-case are fully shielded to offer a complete solution for system builders that require all components to be shielded (particularly in noisy and/or commercial environments).

The OPTO-2 cable is a bi-directional NMEA 0183 (RS422) to RS232 interface cable, that utilises full galvanic opto-isolation to protect the PC input, and "Tranzorb" protection for the PC output. This provides comprehensive isolation of expensive PC hardware when connecting to an NMEA 0183 bus that may have picked up potentially hazardous voltages around the electrically noisy environment of a vessel.

No external power supply is required as the cable takes all necessary power from the RS232/PC port. Simple installation requires wiring the open end to the NMEA bus, and plugging the D-type connector into the PC, to start receiving the NMEA data - true plug'n'play functionality.
Geek Mode

Technical Specification

Supply voltage Derived from computer serial port 7 15 V
Supply current Derived from computer serial port 2 5 mA
NMEA in/out        
Input voltage tolerance

Continuous operation

Short term operation (<1 sec)

-15

-35

+15

+35

V

V

Differential input voltage Required level for data to be detected 1.8 - V
Output voltage Dependant on computer serial port +/-5 +/-15 V
Output current Dependant on computer serial port - 10 mA
Input to output protection Full Galvanic Opto-isolation protection - 2000 V
RS232 in/out        
Input voltage tolerance   -15 +15 V
Input voltage threshold

Logical LOW

Logical HIGH

0.8

1.7

1.2

2.8

V

V

Output voltage range 3k ohm load, "V"=RS232 port voltage -V +V V
Output resistance Output voltage swing +/-2V 200 - ohms
General        
Baud rate   2400 57600 bps
Ambient temperature   -20 +70

°C

OPTO-2 NMEA to RS232 Opto-isolator
Where to buy
Back to top
Testimonial
"We are delighted to work with Actisense. Their high quality products and service means there is no need to sort out warranty issues and problems. The products are well designed and meet almost every customer requirement. It is also a pleasure to deal with the nice and helpful staff, who are always easy to deal with.”
Jani Jarvinen, Managing Director, Promarine Ltd
Stay up to date with insights, news and events from Actisense
Want to buy, sell or need help with your Actisense products?
FIND OUT HOW