Operation
August 2007 4-2 P/N 06-236716-001
4-1.3 Supervisory Signal
In the supervisory state, the control unit has detected a change in state of one or both of its
supervisory input circuits, or its PCB mounted Output Disable switch. A flashing LED indicates
one or more unacknowledged supervisory events. A steady LED indicates all supervisory
events have been acknowlwdged. The LED turns off when the AEGIS receives supervisory-off
messages from all initiating devices that reported supervisory conditions.
4-1.4 Trouble Signal State
In the trouble state, the control unit has detected one or more active troubles such as AC
failure, open circuits, short circuits, ground faults, activation of abort during non-alarm
condition, and so on. In the trouble mode, the Trouble LED and circuit-specific LED will flash,
the internal buzzer will sound, and the trouble relay will de-energize.
With the exception of microprocessor or PCB troubles, all other troubles may be acknowledged
either automatically (i.e., the trouble event reverts to normal condition) or manually by the
operator by pressing the Acknowledge or System Reset control switches.
4-2 CONTROL SWITCH FUNCTIONALITY
Illegal button presses, or illegal combinations of button presses, shall result in a momentary
display of "Err".
4-2.1 Acknowledge
Pressing the Acknowledge control switch during an active trouble, supervisory, or alarm allows
the operator to signal the AEGIS that a new event currently being displayed is understood. The
AEGIS control unit’s buzzer will silence and all flashing Alarm, Trouble, or Supervisory LEDs
will light steady.
4-2.2 Signal Silence
Pressing the Signal Silence control switch at any alarm state will turn on the Signal Silenced
LED and silence all NACs unless configured otherwise (non-silenceable).
4-2.3 System Reset
Resets the system including turning off outputs and interrupting power to all input and output
circuits for a period of five (5) seconds.
Table 4-1. Acknowledge
Event Circuit Specific LED System Event LED Buzzer
Alarm Steady Steady Off
Trouble Steady Steady Off
Supervisory Steady Steady Off
Event Clear Off Off Off
Event Recurrence Flash Flash On Steady - Alarm
On Pulsed - Trouble/Supervisory
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