Maretron ENGINE MONITORING SYSTEM EMS100 User Manual

 

 

Figure 2). You connect the EMS100 to an NMEA 2000

®

 network by plugging the male 

connector into a female receptacle of the NMEA 2000

® 

network (note the key on the male 

connector and keyway on the female connector). Be sure the cable is connected securely and 
that the collar on the cable connector is tightened firmly. The EMS100 is designed such that 
you can plug or unplug it from an NMEA 2000

®

 network while the power to the network is 

connected or disconnected. Please follow recommended practices for installing NMEA 2000

®

 

network products. 
 

 

 

Once the engine harness connections to the Maretron EMS100 have been completed and the 
engine harness has been connected to the NMEA 2000

®

 bus, supply power to the engine and 

check to see that engine information is being properly transmitted by observing an appropriate 
display. Refer to Section 4, “Troubleshooting”, if no engine information appears, otherwise 
proceed to Section 2.5 entitled “Configuration”. 
 

There are several configurable items within the EMS100. You configure the EMS100 using a 
Maretron DSM250 display or other NMEA 2000

®

 display unit that is capable of configuring the 

EMS100. Please refer to the Maretron DSM250 User’s Manual for details. Descriptions of the 
various configurable items appear in the following sections. 
 

In order to allow display equipment to distinguish between data coming from different engines, 
the NMEA 2000

®

 network requires that each engine be assigned a unique instance number in 

the range of 0-252. The EMS100 comes from the factory programmed with an instance 
number of 0. Conventions for instance numbers for common engine configurations are as 
follows: 

•  Single Engine = 0 

•  Dual Engines: Port Engine = 0, Starboard Engine = 1