Knowledge Base
Home » Categories » Multiple Categories

How do I connect a Maretron Field Makable Connector or Field Attachable to an NMEA2000 Cable?

The heart of the NMEA2000 system is the cabling infrastructure and it is vital that field connections are made correct to avoid damage to sensors or non-intelligent components such as tees, multi-ports, power-taps. Maretron offers four types of Field Makable connector for Micro and Mid sized cable.  Notice that in Figure 1 an NMEA2000 cable consist of four colored wires and one bare. Groups of wire may be surrounded by foil or wire braid for the purpose of shielding. Correctly made connections is vital to the operation and long-term life of an NMEA2000 system.

Each colored wires provides an instant reference for technicians to define the conductors purpose. Red for DC+ positive/source, Black for DC- negative/minus,  Blue represents CAN- negative/low, and white represents CAN+ positive/Hi. Finally the Bare non-jacketed wire represents the cabling shield. 

Here is a step by step process to make a field connection:

Select from the following part number(s) to determine the type of connection you will need:

Part numbers and descriptions of Maretron's Micro/Mid field attachable connectors:

  • FA-CM-ST: Micro/Mid Field Attachable Connector (Straight Male)
  • FA-CM-90: Micro/Mid Field Attachable Connector (90° Male)
  • FA-CF-ST: Micro/Mid Field Attachable Connector (Straight Female)
  • FA-CF-90: Micro/Mid Field Attachable Connector (90° Female)

 Here is a list of tools that one may use(Figure 2):

- Manual or automatic wire stripper tool

- heat shrink tube or liquid electrical tape (recommended)

- precision slotted or "flat-blade" screwdriver


Steps to follow:

1. Prepare the wire receiving the Field Makeable Connector by carefully removing 20mm of outer cable coating. Carefully remove outer foil or wire braid surrounding the wires. Next, proceed to remove 5mm on each coated conductor except the n-insulated stranded wire. see Figure 3. 

Slide each piece of the field makeable connector onto the cable starting with the cable collar, cable gland, cable housing. Refer to Figure 3a which provides a numbered sequence.

2. Connect the bare (shield) wire first before the uninsulated stranded wire becomes separated. Maretron does recommend to use shrink tube or liquid tape to further isolate the bare shield wire to avoid possible contact with power or data conductors within the Field Makable connector.  Shown in Figure 7

3. Connect all wires to the correct terminals as marked and colored on the Field Makeable Connector, Leave the center blue wire for last.  Shown in Figure 4.


4. Slide the strain relief parts shown in Figure 3a (parts shown as steps  2 and 1) back towards the connectors coupling nut and secure with a counter clockwise rotation of the threaded coupling nut. 

5. Finally secure the Cable collar to secure the cable from movement inside the Field Makeable Connector.

See in figures 5-7 properly made Field-Makeable with NMEA2000 cable assemblies.


 Figure 7 shows added precaution to isolate the bare shield wire from any other conductors which helps extend life to your connection in a high moisture environment.  


Attachments Attachments
There are no attachments for this article.
Related Articles RSS Feed
Why N2K™?
Viewed 1606 times since Wed, Sep 2, 2015
Can a TMP100 be used to monitor engine coolant temperatures?
Viewed 1728 times since Wed, Jul 6, 2016
Does Maretron offer any recommendations for securing NMEA 2000 cabling?
Viewed 3756 times since Fri, Mar 2, 2012
Does Maretron N2K cabling have a fire resistance specification?
Viewed 2309 times since Thu, Dec 20, 2012
Testing a 4-20mA Transducer
Viewed 620 times since Mon, Sep 30, 2019
How do I show simple bilge information on Mareton’s DSM150 or DSM250 displays?
Viewed 3601 times since Sat, Apr 27, 2013
Some helpful information to installing your first or the next Maretron N2KNetwork.
Viewed 4014 times since Thu, Feb 3, 2011
Should I use double-ended cordsets or should I build my own cables using bulk cable and field-attachable connectors?
Viewed 3429 times since Fri, Apr 16, 2010
What is a backbone or trunk line?
Viewed 5954 times since Fri, Apr 16, 2010
Smoke Alarms – Why don’t we use them on boats?
Viewed 3419 times since Thu, Jun 13, 2013
Subscribe to knowledgebase
Get notified when new articles are added to the knowledgebase.