Juniper ACX2000 Configuration Guide

Alarm Output
Alarm output provides dry contacts to connect to external equipment, such as an audible
or visual alarm that switches on or off–for example, a bell or a light. The four alarm output
relay ports—0 through 3—are set up as follows:
•
Ports 0 and 1—These ports can be configured to trigger an alarm when the system
temperature goes to the red alarm status and when an alarm input port is triggered.
•
Ports 2 and 3—These ports are not configured. They are used to indicate system major
and minor alarms and are normally open. When a condition triggers an alarm, an alarm
message is displayed.
To view the alarm input and output relay information, issue the show chassis craft-interface
command from the Junos OS command line interface.
Related
Documentation
Alarm Contact Port on the ACX2000 Router (Hardware topic)•
• Configuring Chassis Alarm Relays on page 159
• Configuring Chassis Alarm Input on page 160
• Configuring Chassis Alarm Output on page 161
• relay (Chassis Alarm) on page 1693
Configuring Chassis Alarm Relays
On ACX Series routers, you can configure alarm relays that can trigger alarms and turn
external devices on or off. For example, if the router heats up to more than the critical
temperature, the output port is activated and a device connected to the output port—such
as a fan—is turned on.
To configure conditions that trigger alarms, include the relay statement with the input
and output options at the [edit chassis alarm] hierarchy level.
[edit chassis alarm]
relay
input {
port port-number {
mode (close | open);
trigger (ignore | red | yellow);
}
}
output{
port port-number {
input-relay input-relay;
mode (close | open);
temperature;
}
}
159Copyright © 2017, Juniper Networks, Inc.
Chapter 4: Configuring Interfaces and Chassis

Juniper ACX2000 Specifications

General

Brand	Juniper
Model	ACX2000
Category	Network Router
Language	English