Mx2010 Alarm Leds And Alarm Cutoff/Lamp Test Button - Juniper MX2010 Hardware Manual

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Figure 10: Alarm Relay Contacts

Table 16: Alarm Relay Contacts

Function No.

MINOR ALARM–[NC C NO]

MAJOR ALARM–[NC C NO]

MX2010 Alarm LEDs and Alarm Cutoff/Lamp Test Button

Two large alarm LEDs are located at the upper right of the craft interface. When lit, the circular red LED

indicates a critical condition that can result in a system shutdown. A lit triangular yellow LED indicates a

less severe condition that requires monitoring or maintenance. Both LEDs can be lit simultaneously.

A condition that causes an LED to light also activates the corresponding alarm relay contact on the craft

To deactivate red and yellow alarms, press the button labeled ACO/LT (for "alarm cutoff/lamp test"), which

is located to the right of the alarm LEDs. Deactivating an alarm turns off both LEDs and deactivates the

device attached to the corresponding alarm relay contact on the craft interface.

Table 17 on page 36

describes the alarm LEDs and alarm cutoff button in more detail.

The alarm relays consist of three terminal

contacts with a normal closed (NC),

common (C), and normal open (NO) relays

that signal a minor or major alarm when

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