Making Alarm Connections - Symmetricom SSU-2000e User Manual

1. Install the BUS Termination Assembly (12013049-000-0-1, shown in
on connector J8 of the main shelf.
2. Install an SDU Backup Clock terminator (551021-0040, shown in
connector J9.
Notes:
If you are not installing expansion shelves, you must install the
Expansion and Backup Clock Terminators on connectors J8 and J9
on the SSU-2000e.
The signals on connectors J8 and J9 are in differential pairs. Each
pair is terminated with a series 1000 pf capacitor (J8) and a 120 Ω
resistor (J9) on external plug-on terminators with locking slide latch.
Figure 2-10. SSU Expansion Terminator (J8)
Figure 2-11. SSU Backup Clock Terminator (J9) Side and Front View

Making Alarm Connections

The SSU-2000e Shelf has two filtered DA15P male connectors for local and remote
alarm contact closure connections, as shown in
are made on J1 and the remote connections are made on J2. The connectors are
labeled ALARM CLOSURES, LOCAL (J1) and REMOTE (J2). They each have
connections for normally open (NO), common or wiper (COM), and normally closed
(NC) for each of these alarm categories: CRITICAL, MAJOR and MINOR.
12713140-002-2 Revision E – October 2006
Chapter 2 Installing the SSU-2000e
Making Alarm Connections
Figure
Figure 2-12. The local connections
SSU-2000e User's Guide
Figure 2-10)
2-11) on
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