stops flashing when all original sources triggering the alarm are
corrected.
If a new alarm condition or conditions occur before the original alarm
conditions are corrected, the internal buzzer and relay contacts will not
reactivate. They will only reactivate after all original alarm conditions are
corrected.
5.7.4 Auxiliary alarm lights
When an alarm condition occurs, any of the six auxiliary red alarm lights may
switch on, in addition to the main alarm light, to help diagnose the alarm
condition. The following sections describe the six auxiliary alarm lights.
5.7.4.1 External alarm (EXT ALARM)
The red external alarm (labeled EXT ALARM) light switches on to indicate that
an alarm condition has triggered the built-in relay outputs to turn on any
externally installed alarms such as lights or bells.
The external alarm is connected to the matrix through the 9-pin D-type
connector on the matrix’s rear panel labeled Alarm I/O.
5.7.4.2 Temp alarm (Temperature alarm)
The red Temp (temperature) alarm light switches on to indicate one or both
of the following:
The active CPU card has detected a temperature in the matrix above a
threshold.
One of two CPU cards has been removed from the matrix.
Note: This feature only operates if there are two CPU cards installed in the matrix. If
there is only one CPU card, the Temp alarm light does not switch on if the card
is removed.
5.7.4.3 Fan-fail alarm
The red fan-fail alarm light illuminates when either fan in the power-supply
module stops rotating correctly.
5.7.4.4 PSU1 Fail
When the first power supply unit is operating correctly, the red PSU1 light
stays off, while the four green power supply lights (+12V, +5V, +3.3V, -12V)
stay on continuously.
If a DC output or AC input to the first power supply drops too low, the red PSU1
light switches on. The amber (XP) or red (Power-One) light on the power
supply unit itself also switches on to indicate the same condition. One of the
To Next Page
Loading...
Need help?
General
