5 Shutdown Situations
5.1 From Overspeed
If engine speed input senses an engine speed higher than the configured max setting, then
the SDU will activate the common shutdown outputs.
5.1.1 Shutdown Override
The Shutdown Override input does not disable the Overspeed Shutdown.
5.1.2 Indication
The red LED OVERSPEED will be lit.
The red LED SHUTDOWN will be lit.
5.1.3 Acknowledge
When the engine has stopped, the shutdown can be reset using the Acknowledge button on
the SDU.
5.2 From Switch Channels or Analog Channels
If either of the switches or analog channels indicate a shutdown, then the SDU will activate
the common shutdown outputs.
5.2.1 Shutdown Override
Each channel may be configured to disregard the Shutdown Override input command.
5.2.2 Indication
The red LED for the corresponding channel will be lit.
The red LED SHUTDOWN will be lit.
5.2.3 Acknowledge
To acknowledge alarms and faults press the acknowledge button. In the case of a shutdown
the shutdown state must be acknowledged once the engine has stopped (<5 RPM + 7
seconds, configurable).
6 Configurable Relays and Outputs
The configurable relays and output can be configured to any of the below functions.
Function
Description
SHUTDOWN
Activates for any shutdown.
Stays activated until the engine has stopped, and the
Page 7 (10)
