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PRO-MUX-2 Professional NMEA 0183 Intelligent Multiplexer

SKU: ACT-0080

Eight OPTO-isolated inputs and six ISO-Drive™isolated outputs. Offering device protection and excellent flexibility, all in one product.

Actisense introduces the Actisense® PRO-MUX-2, the intelligent, type-approved PRO range multiplexer.

The PRO-MUX-2 is rugged, with a stainless steel housing, and isolates all inputs and outputs. With eight NMEA 0183 inputs, six NMEA 0183 outputs, a bi-directional serial port and an Ethernet port, the PRO-MUX-2 is a perfect solution for larger leisure vessels and commercial shipping. It is an excellent addition for systems that require type-approved devices.

Due to its design, the PRO-MUX-2 will suit the majority of NMEA 0183 systems, from leisure to class vessels.


The eight NMEA 0183 inputs can be routed to any of the six NMEA 0183 outputs, providing a highly customisable network. A bi-directional serial and Ethernet ports allow for simple configuration and diagnostics using Actisense software.

The configuration tool is accessible via any popular web browser (using the Ethernet port), so there are no PC operating system compatibility issues. The web-based configuration tool will allow users to tune the exact data available on each output. The default setup is for all data to go to all outputs.

2-part pluggable connectors on the PRO-MUX-2 (screw or screwless terminals available) mean that users can easily install new devices without the need to remove the PRO-MUX-2 from its mounted location. A professional DIN rail mounting mechanism keeps the PRO-MUX-2 secure in high-vibration environments. Helpful LEDs indicate power, data in, data out and the alarm status to aid diagnostics.


  • 8 OPTO-isolated NMEA 0183 inputs
  • 6 ISO-Drive NMEA 0183 outputs
  • Bi-directional isolated serial port (can be used for additional NMEA 0183 input/ output)
  • 0183 streaming via Ethernet
  • Alarm output (N/O and N/C contacts)
  • Designed for 12- and 24-volt supply
  • Isolation to battery supply
  • Configurable input and output baud rates for rate conversion
  • Data combining from any input to any output
  • Two independent Autoswitch virtual inputs with priority
  • Advanced sentence-based filtering/routing
  • Diagnostic LEDs on all inputs and outputs
  • Alarm, mode and Bi-colour Status LEDs
  • A 2-part pluggable connector system supports both screw and screwless terminals.
  • DIN rail or Panel mountable
  • Advanced statistics are available via a Web Browser


  • Quick and easy to install
  • Configuration using standard web browser, no PC operating system compatibility issues
  • Advanced features solve NMEA 0183 data routing problems
  • Fully isolated with ISO-Drive technology for peace of mind
  • Easy firmware updates make the device future-proof

You can also view the full Actisense range HERE.

By Actisense

Power Supply


Input Supply Voltage      9 to 35 V DC
Input Supply Current      220mA max @ 12V DC (all outputs @ full drive into 100-ohm loads)
Input Protection              Continuous reverse polarity, transient overvoltage and ESD protection
Power Indicator                LED, Blue – indicates that the unit is functioning correctly
Input Supply Connector Pluggable 2-way screw terminal, 5.08mm pitch (12 to 30 AWG)

NMEA 0183 Port – Listener & Talker


Number of Listener / Input Ports     Eight isolated NMEA 0183 Listeners
Number of Talker / Output Ports     Six isolated NMEA 0183 Talkers
Compatibility    Fully NMEA 0183, RS422 & RS232 compatible. RS485 Listener compatible
Speed/baud rate           4800 to 38400 bps
Talker Output Voltage Drive        >= 2.2V (differential) into 100 ohm
Talker Output Current Drive        20 mA maximum per output
Talker Output Protection             Short circuit and ESD
Talker Data Indicator      LED, Orange (Flashes at data rate)
Listener Input Voltage Tolerance            -15 V to +15 V continuous, -35 V to +35 V short term (< 1 second)
Listener Input Protection             Current limited overdrive protection to 40 VDC and ESD protection
Listener Data Indicator  LED, Green (Flashes to indicate valid input)
Connectors         Pluggable 2/3-way screw terminals, 5.08mm pitch (12 to 30 AWG)

Serial Port


Compatibility    RS422 & RS232 compatible. RS485 Listener compatible
Speed/baud rate           4800 to 115200 bps
Output Voltage Drive     >= 2.1V (differential) into 100 ohm
Output Current Drive     20 mA max.
Output Protection           Short circuit and ESD
Input Voltage Tolerance -15 V to +15 V continuous, -35 V to +35 V short term (< 1 second)
Input Protection              Current limited overdrive protection to 40 VDC and ESD protection
Data Indicators LED’s: Green = Receive, Orange = Transmit
Connectors         Pluggable 3-way screw terminals, 5.08mm pitch (12 to 30 AWG)

Ethernet Port


Host Interface   10/100BaseT, automatic polarity detection
Supported Protocols      TCP/IP for configuration and firmware updating
  TCP/IP and UDP for NMEA 0183 comms
Indicators            Green = Link/Activity, Yellow = 100 Mbps
Connector           RJ45



NMEA 0183 Listener      OPTO-Isolated, Hi-Pot tested to 1000V
NMEA 0183 Talker          Uses IsoDrive™, Hi-Pot tested to 1000V
Serial Port           Uses IsoDrive™, Hi-Pot tested to 1000V
Alarm Relay       Hi-Pot tested to 1000V
Ethernet Port     2kV for 60s

Mode Inputs


Input Voltage Range       0 to 35V DC
Protection          Transient overvoltage and ESD protection
Connectors         Pluggable 2-way screw terminals, 5.08mm pitch (12 to 30 AWG)

Alarm Output


Contacts              Common, Normally Open and Normally Closed
Alarm Indicator LED, Red indicates a valid alarm condition
Contact Ratings 35VAC / 50VDC
Connectors         Pluggable 3-way screw terminals, 5.08mm pitch (12 to 30 AWG)



Housing Material             316 Stainless Steel
Dimensions        210mm (W) x 128mm (H) x 27mm (D)
Weight 540g
Mounting            Bulkhead mount or DIN rail mount (DIN kit 1)

Approvals and Certifications


EMC       IEC 60945:2002-08, DNVGL-CG-0339:2019 & IACS UR E10 Rev7
Compass Safe Distance 175mm
Type Approval Certificate            TBD
Operating Temperature -25 to +70°C
Storage Temperature     -40 to +85°C
Relative Humidity (RH)  95% @ 55°C
Environmental Protection           IP40
Guarantee          5 Years

PRO-MUX-2 Data Sheet