J2K100 User’s Manual
Page B8 Appendix B – Application Note Revision 1.1
NMEA 2000
®
instance to be set to 0. Again, you can use a Maretron display to program the
appropriate NMEA 2000
®
instance. Refer to the J2K100 User’s Manual (Section 2.5) for a
detailed of configuring a J2K100.
4.3 Two Engines/Gensets, No Existing J1939 Network Installation
Although an engine or genset may have a J1939 interface, a particular installation may not
have a J1939 network because no other device is connected. In this case, it will be necessary
to build a J1939 network to interconnect the engine/genset with the Maretron J2K100 gateway,
which can be done using NMEA 2000
®
cable and connectors. Figure 7 shows how to build a
J1939 network using Maretron NMEA 2000
®
cable and connectors.
Figure 7 – Two Engines/Gensets, No J1939 Network Installation Diagram
Although not required, this example mostly uses NMEA 2000
®
cable and connectors for the
J1939 network. This is convenient because the network components are readily available and
easily plugged together. Notice that there is no powertap in the J1939 network and this is
because the J1939 engine/genset and J2K100 receive their power independent of the J1939
network. An alternative to building the J1939 network with NMEA 2000
®
approved cabling is to
use SAE recommended cabling and connectors (see Section 3.1).
For illustration purposes, the J1939 network in Figure 5 shows the engine drops or stubs (i.e.,
connections between engines/gensets and the Maretron tees) as a two wire or twisted pair
J1939
Engine or
Genset
Maretron Micro Double
Ended Cordsets
(MDND22A-M0x0)
Maretron Micro
Female Terminator
(MDND150)
Maretron Micro
Male Terminator
(MDND100)
Maretron
Micro Tee
(MMICT555)
Maretron J1939 to
NMEA 2000
®
Gateway (J2K100)
J1939 Network
NMEA 2000
Network
Maretron Display
(DSM200/DSM250)
Maretron Micro Male Field
Attachable Connector
(M8A5006-32DN)
User Supplied Cable/Connector
Compatible with Engine/Genset
Manufacture Cabling System
Maretron Micro
Powertap Tee
(M82516-M0x0)
J1939
Engine or
Genset
Maretron J1939 to
NMEA 2000
®
Gateway (J2K100)
Maretron
Micro Tee
(MMICT555)
(23 strony)
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