User's Manual

Installing Unison Components PRELIMINARY
6-40 InterReach Unison User Guide and Reference Manual
PN 8700-10
620003-0 Rev. A
6.7.2 Alarm Sense
Use the AdminManager to enable the Unison system for “alarm sense” when con-
necting to the contact closure of LGCell Main Hubs or other external alarms.
Using Unison to Monitor LGCells
When you connect LGCell to Unison, the Unison Main Hub is the input of the alarms
(alarm sense) and the LGCell is the output (alarm source), as shown in the following
figure.
Figure 6-8 Connecting LGCell to Unison
LGCell supports only major errors. However, you can use either the 5-port
Daisy-Chain Alarm Cable (see page 6-41) or the Alarm Source Daisy-Chain Cable
(see page 6-42) . You must use the Alarm Sense Adapter Cable (see page 6-43) to
interface either cable to LGCell. The adapter cable is required to translate the LGCell
major error pinout to the sense input pins on the Unison Main Hub.
Up to 5 LGCell Main HubsUnison Main Hub
Alarm
Sense
Alarm
Source
Alarm
Source
Alarm Sense
Adapter Cable
5-port Daisy-Chain Alarm Cable or Alarm Source Daisy-Chain Cable