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Juniper MX104 Hardware Guide

Juniper MX104
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CHAPTER 2
Chassis Components and Descriptions
MX104 Alarm Contact Port Overview on page 9
MX104 LEDs Overview on page 11
MX104 LEDs Overview on page 13
MX104 LEDs Overview on page 15
MX104 Clocking and Timing Ports Overview on page 17
MX104 Alarm Contact Port Overview
The MX104 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 DE-15 alarm cable is required to connect the MX104 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. Table 4 on page 10 describes the functions of
the alarm contacts.
9Copyright © 2017, Juniper Networks, Inc.

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Juniper MX104 Specifications

General IconGeneral
Product NameMX104
Product SeriesMX Series
Switching Capacity80 Gbps
Throughput80 Gbps
Operating SystemJunos OS
Humidity5% to 90% non-condensing
Interfaces10 Gigabit Ethernet, Gigabit Ethernet
Power SupplyDual redundant AC or DC
CoolingFront-to-back airflow
Memory8 GB
Operating Temperature0°C to 40°C

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