Clear-Com HX System Frames - Manual (Page 66)

5.7.2 Alarm lights and alarm reset button
The following conditions trigger an alarm:
• If any of the voltages produced by the first external power supply unit fall below
normal levels.
• If any of the voltages produced by the second external power supply unit fall below
normal levels.
• If an internal matrix alarm condition activates a matrix relay to turn on an external
alarm.
• If the active CPU card exceeds a temperature threshold.
• If either of the CPU cards is removed from the matrix.
• If either of the matrix’s two cooling fans stop operating.
• If the temperature inside the matrix exceeds a set threshold.
Alarm reset button
When the alarm reset button is pressed the following events take place, even if the alarm
condition has not been corrected:
• The internal audible alarm buzzer stops buzzing.
• Any wired relay contacts return to their inactive state. If these relays are connected to
external alarm lights or alarm buzzers, those lights or buzzers shut off.
• If the original alarm condition still exists, the red main alarm light on the matrix’s front
panel continues to flash. The red main alarm light only 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.
Main alarm light [Alarm]
An alarm source triggers the red main alarm light [Alarm] and also one of the additional,
specific red alarm lights, allowing you to identify or correct alarm conditions before they
affect the operation of the matrix (see below).
An audible warning (buzzing) is also given.
Note:
Any installed alarm relay outputs switch to active (the normally open contact closes and the
normally closed contact opens). When the alarm relay activates, it can cause an externally
connected device like a light or buzzer to switch on.
66 Eclipse HX-Delta User Guide