User's Manual

ModuLite Installation Guide ALARM MONITORING
Foxcom Wireless Confidential and Proprietary Information
Document No. 43-93-005-05 y 48
6. Alarm Monitoring
The Modular Base Unit has a 25 pin D-type connector that is connected to 4 dry contact relays
(MB4U). Each of the relays indicates the status of the link between the MBU and one of the
MRC’s. This capability provides the status of the optical communications for each service. The
relay connections on the 25pin D-type connector can be connected directly to the BTS alarm
relays and can be monitored from the remote end.
In order to transmit the ModuLite™ system as a “major alarm”, all dry contact pins need to be
connected in a serial (cascade) formation, for Normally Closed alarm. All dry contacts need to be
connected in parallel formation, for Normally Open alarm.
Note
For further information contact Foxcom Wireless
Table 7: 25 Pin Alarm Pinouts
Pin Type of Alarm Port
1 Dry Contact 4 1
2 Dry Contact 4 2
3 Open Collector 4
4 Dry Contact 1 1
5 Dry Contact 1 2
6 Open Collector 1
7 Dry Contact 2 1
8 Dry Contact 2 2
9 Open Collector 2
10 Dry Contact 3 1
11 Dry Contact 3 2
12 Open Collector 3
13 Dry Contact 8 1
14 Dry Contact 8 2
15 Open Collector 8
16 Dry Contact 5 1
17 Dry Contact 5 2
18 Open Collector 5
19 Dry Contact 6 1
20 Dry Contact 6 2
21 Open Collector 6
22 Dry Contact 7 1
23 Dry Contact 7 2
24 Open Collector 7
25 - -