Juniper ACX1000 Hardware Guide

Table 6: Alarm Relay Contact Functions
FunctionContact Name
Contact
Name
Current is not flowing through Contact 1 and Contact 2
[REF] when operating normally. When the current flows,
the closed alarm is generated.
Normally Open (NO)Contact 1
Current is flowing through Contact 1 and Contact 2 [REF]
when operating normally. When the current stops
flowing, the open alarm is generated.
Normally Closed (NC)
Provides the current path for the external alarm-reporting
device and functions as a reference or negative potential
terminal for Contact 1.
Reference (REF)Contact 2
Figure 9 on page 28 shows an example of a wiring diagram for a simple output
alarm-reporting device. In this case the device is a light bulb that illuminates when the
device encounters a condition that activates the red alarm LED and relay contacts. The
alarm relay contacts can also be used to activate other devices such as bells or buzzers.
Figure 9: Sample Output Alarm-Reporting Device
Figure 10 on page 29 shows an example of a wiring diagram for a simple input
alarm-reporting device. In this case the push button switch is an alarm sensor that triggers
an input alarm when a door-open condition occurs.
Copyright © 2017, Juniper Networks, Inc.28
ACX1000 and ACX1100 Universal Access Router Hardware Guide

Juniper ACX1000 Specifications

General

Brand	Juniper
Model	ACX1000
Category	Network Router
Language	English