SeaSTAR i6800 - Engine RPM Source; NMEA Gateway Connection

3-10
© 2013 SeaStar Solutions i6800 Installation Supplement, Rev. C
The i6800 system is designed to work without engine speed feedback.
The Power Train Sync (PTS) features described in the User’s Manual
simply output the same throttle percentage to each engine in order
to synchronize engine speeds. In some cases this open loop control
technique may result in poor synchronization performance. These
performance issues may be corrected by adding engine RPM feedback.
Before adding an RPM source, please consider the following:
• We recommend that you sea trial the vessel and evaluate Sync
performance before adding engine RPM feedback.
• The Sync features are intended for use at normal cruising speeds.
Poor or marginal Sync performance at low speeds may not justify the
added expense of RPM feedback. Always evaluate the performance
in the range of normal cruising speeds.
• An engine speed mismatch can often be corrected without an RPM
source by carefully adjusting either the throttle actuator adjuster
barrels or the Idle Offset parameters. See section 4.2.3.
3.5 Engine RPM Source
NMEA Gateway Connection
At the time of printing, the only supported means of obtaining an engine
RPM source is with a dedicated NMEA 2000 gateway, available from
the engine manufacturer. Do not use an existing gateway connected
to an existing NMEA 2000 network. The CAN2 network is not NMEA
2000 compliant, and there is a risk that an otherwise minor failure
on the NMEA 2000 bus could interfere with the EST operation.
Connect the NMEA 2000 gateway to the engine bus and to a tee
on the CAN2 network as shown in figure 3-9.
3.5.1
Figure 3-9. NMEA gateway connection.
NMEA 2000 GATEWAY
(NOT INCLUDED IN KIT. SEE ENGINE
RIGGING GUIDE)
TO ENGINE BUS
i6800 CAN2 BUS
WARNING
ALTHOUGH BOTH NETWORKS
USE COMPATIBLE CONNECTORS ,
DO NOT CONNECT THE I6800
NETWORK TO A PUBLIC NMEA
2000 BUS.