DCU 205 User’s Manual
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6.
S
HUTDOWN CENTRE
6.1.
In general
The Control Unit recognises up to 4 conditions that will activate engine
shutdown. They are:
•
Overspeed
•
Lub. oil press. low
NO
•
Cooling water temp. high
NO
•
Spare
NO
The Overspeed alarm is based upon the speed
sensor frequency. The other three are normally
open (NO) contact inputs.
The LUB. OIL PRESS LOW and SPARE alarms
are excluded for 15 seconds after the engine has
started, and are excluded if the engine is
stopped.
An activated shutdown will flash its corresponding alarm lamp and start the
siren. The siren can be silenced by pressing the Siren Off button located on
the front panel, without resetting the alarm.
The shutdown sequence is as follows:
•
The SHUTDOWN alarm output is activated.
•
The Emergency Stop system output (wire terminal 11) is activated
(OVERSPEED only).
•
The stop solenoid is activated by applying voltage to terminal 9, and the
engine stops. (The solenoid is activated for approximately 50 seconds).
•
The run solenoid or electronic regulator on terminal 10 is deactivated.
•
The STOP lamp located in the units FUNCTION area remain on as long
as the stop solenoid is activated, or run solenoid is deactivated.
•
The START DISABLED lamp activates.
Any Shutdown is reset by pressing the RESET button.
