• MX240 Component LEDs on the Craft Interface on page 14
• Replacing the MX240 Craft Interface on page 265
MX240 Alarm Relay Contacts on the Craft Interface
The craft interface has two alarm relay contacts for connecting the router to external
alarm devices (see Figure 7 on page 13). Whenever a system condition triggers either the
red or yellow 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.
Figure 7: Alarm Relay Contacts
Related
Documentation
MX240 Craft Interface Overview on page 12•
• MX240 Alarm LEDs and Alarm Cutoff/Lamp Test Button on page 13
• MX240 Component LEDs on the Craft Interface on page 14
• Connecting the MX240 Router to Management and Alarm Devices on page 211
MX240 Alarm LEDs and Alarm Cutoff/Lamp Test Button
Two large alarm LEDs are located at the upper right of the craft interface. The circular
red LED lights to indicate a critical condition that can result in a system shutdown. The
triangular yellow LED lights to indicate 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 interface.
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 6 on page 14 describes the alarm LEDs and alarm cutoff button in more detail.
13Copyright © 2017, Juniper Networks, Inc.
Chapter 3: Chassis Components and Descriptions
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