Connecting Contact Alarms to a Unison System
7-42
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
7.7
Connecting Contact Alarms to a Unison System
The Unison Main Hub can generate (source) two contact alarms as well as sense an
external contact alarm.
• Alarm Source (refer to Section 7.7.1 on page 7-43)
The Main Hub has two alarm contacts, fault (major) and warning (minor). These
contact are normally-closed (NC) and will open when an internal alarm is detected.
NOTE:
The contact can be changed to normally-open (NO) with Admin-
Manager. This is not recommended as no alarm would be sent if power to
the Main Hub fails.
• Fault is activated when any faults or disconnects are detected.
• Warning is activated when any warning conditions are detected except lockout
or when the end-to-end system test is not valid.
• Alarm Sense (refer to Section 7.7.2 on page 7-46)
The Main Hub can monitor an external alarm contact. The port can be configured
for normally-open (NO) or normally-closed (NC) contacts. The interface expects a
set of floating contacts, and an external voltage source is not required for this inter-
face. Use AdminManager or OpsConsole to monitor the port status.
Table 7-9 lists the alarm types, equipment that Unison is connected to, cable(s) used,
and the faults (major and/or minor) that are detected.
Table 7-9
Alarm Types
NOTE:
The 5-port Alarm Daisy-Chain cable is for normally closed (NC)
contacts.
Alarm
Type
Unison
connected to
Cable(s) Used
Alarms Detected
Source
MetroReach
Focus
5-port Alarm Daisy-Chain Cable
Faults
Source
BTS
5-port Alarm Daisy-Chain Cable
Faults and Warnings
In addition, a custom daisy-chain cable-to-BTS interface
cable is required. Make this interface cable to the desired
length and with the appropriate pin placement.
Sense
LGCell
5-port Alarm Daisy-Chain Cable
and the Alarm Sense Adapter
Cable
Faults
