Alarms (J10) - Comtech EF Data SDM-9000 Installation And Operation Manual

SDM-9000 Satellite Modem

2.4.10 Alarms (J10)

The alarms connector is used to provide three Form C contact closures for alarm
reporting, as follows:
•
•
•
The two Form C summary fault contacts currently used are:
•
•
Refer to Chapter 4 for a discussion of alarms monitored. To obtain a system summary
alarm, connect all the Form C contacts in parallel.
The alarms connection is a 9-pin female D connector located on the rear panel of the
modem. Screw locks are provided for mechanical security on the mating connector.
Signal Function
Alarm 1 is OK
Common
Alarm 1 is faulted
Alarm 2 is OK
Common
Alarm 2 is faulted
Alarm 3 is OK
Common
Alarm 3 is faulted
Note: A connection between the common (COM) and normally open (NO) contacts
indicates no alarm.
Rev. 4
Alarm 1 = Not used
Alarm 2 = TX
Alarm 3 = RX
Transmit alarm (Alarm 2)
Receive alarm (Alarm 3)
Name
NO
COM
NC
NO
COM
NC
NO
COM
NC
Pin #
1
2
3
4
5
6
7
8
9
Installation
2–15