Alarm Relay Contacts - Juniper EX9214 Hardware Manual

The alarm cutoff/lamp test (ACO/LT) button, located next to the alarm LEDs, is a control button for
alarms. You can press the ACO/LT button to deactivate major and minor alarms. Deactivating an alarm
turns off both LEDs and deactivates the device attached to the corresponding alarm relay contact on the
craft interface.
Table 12 on page 35 describes the alarm LEDs and the alarm cutoff/lamp test button.
Table 12: Alarm LEDs and Alarm Cutoff/Lamp Test Button
Alarm LEDs and Button
Major alarm LED
Minor alarm LED
Alarm cutoff/lamp test button

Alarm Relay Contacts

The craft interface has two alarm relay contacts for connecting the switch to external alarm devices.
Whenever a system condition triggers either the critical (major alarm) or warning (minor alarm) alarm on
the craft interface, the alarm relay contacts are also activated. The alarm relay contacts are located on
the upper right of the craft interface.
Status Description
Red Indicates a critical condition that can cause the switch to stop
functioning. Possible causes include component removal,
failure, or overheating.
Yellow Indicates a serious but nonfatal error condition, such as
warning for a maintenance or a significant increase in
component temperature.
– Deactivates major and minor alarms. Causes all LEDs on the
craft interface to light (for testing) when pressed and held.
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