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NDC-5 NMEA 0183 Multiplexer
The NDC-5 is more than just an NMEA 0183 Combiner/Multiplexer; it provides an installer with a highly flexible platform that can be used to solve many NMEA 0183 interconnectivity headaches.
The five NMEA 0183 inputs can be routed to any of the two NMEA 0183 outputs providing a highly customisable network. The bi-directional serial port and Ethernet port also 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 to contend with. Using the web based configuration tool will allow the user to finely tune the exact data available on each output. The default setup is for all data to go to all outputs.

Industry leading isolation is provided on all inputs and outputs as standard, so that connected devices safely avoid hazardous ground loops, the number one cause of product failure in NMEA 0183 networks. This makes the NDC-5 robust enough to handle any NMEA 0183 installation.

Pluggable connectors allow new devices to be easily installed without the need to remove the NDC-5 from its mounted location. A professional DIN rail mounting mechanism keeps the NDC-5 secure in high vibration environments. Helpful LEDs indicate power, data in, and status conditions to aid diagnostics.
Geek Mode
  • Ethernet port – for configuration and diagnostics. Sharing NMEA 0183 data will be added in a future firmware update
  • 6 OPTO-Isolated NMEA 0183 inputs (including the serial port)
  • 3 ISO-Drive NMEA 0183 outputs (including serial port)
  • Advanced Data Filtering/Routing
  • Configurable Input and output baud rates
  • Autoswitch mode available to offer system redundancy
  • Safe connection to USB with the ‘USBKIT-REG’ while powered via battery (not available with NDC-4)
  • Serial port – for configuration, diagnostics or as an additional NMEA 0183 input/output
  • Free firmware updates make the device future-proof
  • Power LED to indicate operational state
  • Rx LED to indicate data on inputs
  • Status LED (bi-colour) to indicate output Data Overload or a range of other states
  • DIN rail or Panel mountable
  • Pluggable screw terminal connectors for quick and easy installation

Technical Specification

Power Supply
Input supply voltage 9 to 35 V DC
Input supply current 110mA 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 unit is functioning correctly
NMEA 0183 Port - Listener & Talker
Number of Listener / input ports 5 isolated NMEA 0183 Listeners
Number of Talker / output ports 2 isolated NMEA 0183 Talkers
Compatibility Fully NMEA 0183, RS422 & RS232 compatible. RS485 Listener compatible
Electrical isolation 2500 V input to ground, 1500 V output to ground using ISO-Drive™
Speed / baud rate In1 to In4: up to 38400 bps In5: 4800 bps Out1: up to 115200 bps Out2: up to 38400 bps

Talker output voltage drive

>= 2.1V (differential) into 100 ohm
Talker output current drive 20 mA maximum per output
Talker output protection Short circuit and ESD
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)
Status indicator LED, Green / Yellow / Red to indicate status (see user manual)
Serial Port
Number of input ports 1 isolated input
Number of output ports 1 isolated output
Compatibility RS422 & RS232 compatible. RS485 Listener compatible
Electrical isolation 2500 V input to ground 1500 V output to ground using ISO-Drive™
Speed / baud rate 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
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
Connector RJ45
Electrical isolation 2kV
Indicators Green - Link, Yellow - 100 Mbps
Mode Inputs
Input voltage range 0 to 35V DC
Protection Transient overvoltage and ESD protection
Alarm Output
Contacts Normally open and normally closed*
Electrical isolation 1000V between power supply and contacts
Alarm indicator LED, red indicates a valid alarm condition
Housing material Polycarbonate
Protective Lid Material Polycarbonate
Sealing Material Expanded silicone foam gasket, closed cell polyurethane splash guard and ePTFE waterproof vent
Dimensions 127mm (L) x 106mm (W) x 48mm (H)
Weight 230g including screw terminals and RJ45 cap
Mounting 4 x 3.5mm lugs to allow panel mount with self tapping screws (included), optional DIN rail mount available on request.
Compass safe distance TBD
Wiring terminals Pluggable 2/3 way screw terminal, 3.5mm pitch, 14 to 30 AWG
Approvals and Certifications
EMC IEC 60945 (sections 9 & 10)
CE 2014/30/EU
Environmental protection IP65
Operating temperature -15°C to +55°C
Storage temperature -40°C to +85°C
Relative Humidity (RH) 0 - 80% RH
Guarantee 3 years
NDC-4 Vs NDC-5
Feature NDC-4 NDC-5
Inputs (inc. serial port) 5 6
Outputs (inc. serial port) 2 3
Dedicated serial port - Yes
Ethernet port - Yes
Config tool Windows only Any popular web browser on any OS
Basic data filtering Yes Yes
Advanced data routing - Yes
Safe USB connection while powered via a battery - Yes
Pluggable connectors (quicker and easier installation) - Yes
Weather sealed IP66 IP66
NDC-5 NMEA 0183 Multiplexer
Where to buy
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