Acx4000 Alarm Contact Port Overview - Juniper ACX4000 Hardware Manual

Table 7: SFP+ Port Features
Feature Description
Supported standards See the Hardware Compatibility Tool for the specifications of transceivers supported on
the ACX4000. The list of supported transceivers for the ACX4000 is located at
pathfinder.juniper.net/hct/product/#prd=ACX4000.
Cable
Connector
Port numbering 0/3/0 and 0/3/1
(hardware)
Port numbering xe-0/3/0
(software)

ACX4000 Alarm Contact Port Overview

The ACX4000 router has four external alarm contacts (also known as potential free contacts) for
connecting the router to external alarm devices. The port labeled ALARM uses a 15-pin D-type
connector. The external alarm contact has 15 pins that accept a single core wire from external alarm
devices. A DE15 alarm cable is required to connect the ACX4000 router to external alarm devices. Use
the gauge wire appropriate for the external device that you are connecting.
Whenever a system condition triggers an alarm, the alarm relay contacts are activated, which in turn
activates the external alarm devices. The alarm setting is open or closed.
You can connect and configure two output alarms and four input alarms. Two additional output alarms
are reserved and are used to indicate major and minor system alarms. Each output and input alarm has
two contacts for connecting the router to external alarm devices. Contact 1 of each alarm can be
configured as Normally Open [NO] or Normally Closed [NC] through the CLI. Contact 2 of each alarm
functions as a reference [REF] or negative potential terminal for Contact 1 of the corresponding alarm
and provides a current path for external alarm devices.
the alarm contacts.
xe-0/3/1
and
Table 8 on page 49 describes the functions of
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