Description
The DGU is a diesel engine speed
controller. It is used on the ship’s
main engine to control the engine
RPM.
The desired engine set-point speed is
provided by either the AC600 ACP
or by a manual control lever. Once
the set point is established, the DGU
maintains the engine RPM at all
times.

The DGU includes all essential
signals related to the main governor
functions. It works as an independent
unit and will operate even if both
CAN networks should fail.
The DGU contains four CAN-buses
and two RS485 serial lines. Each port
is galvanically isolated.
The input supply voltage of 24 VDC
should not be below +18 V or above
+32 V. It is galvanically isolated.
Features
• Scaled in technical units
• Limit check
• Alarm and monitoring for all
channels
• Trend
• Time stamp of alarms and events
(0.001 seconds)
• Built In Self Test (BIST)
• CAN net status, error handling
Main functions
• Automatic regulation of the main
engine RPM
• Automatic limiting functions such
as scavenging air and torque.
• Manual limiting functions such
as RPM and fuel limiters
• Programmed to avoid running
in barred speed range (critical
RPM)
• Automatic reduction of RPM
(slow down) function
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