User's Manual

PN 8700-10 Help Hot Line (U.S. only): 1-800-530-9960 7-41
620003-0 Rev. B
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 (see Section 7.7.1 on page 7-42)
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.
• 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 (see Section 7.7.2 on page 7-45)
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. AdminManager or OpsConsole is used to monitor the port status.
The following table lists the alarm types, equipment that Unison is connected to,
cable(s) used, and the errors (major and/or minor) that are detected.
Note that LGCell and MetroReach Focus support only faults (major errors).
Do not mix LGCell and Unison Main Hubs in the same daisy-chain. You can
daisy-chain multiple LGCell Main Hubs together and use the Alarm Sense Adapter
Cable to connect the chain to a Unison Main Hub, which will act as an alarm sensor.
Alarm
Type
Unison
connected to Cable(s) Used Errors Detected
Source MetroReach 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