Clock Output Connector To Output Module Relationship - Symmetricom SSU-2000e User Manual

Chapter 1 Product Overview
System Components
The signal outputs from each pair of Output modules are summed internal to the
unit and all outputs are connected to the output connectors through
software-controlled relays in the Output modules. If one of a redundant pair of Clock
modules fails, the software can electrically disconnect the faulty module without
interrupting the clock outputs.
Table 1-3. Clock Output Connector to Output Module Relationship
Slot Label
(Name)
OUTPUT-1
OUTPUT-2
OUTPUT-3
OUTPUT-4
OUTPUT-5
OUTPUT-6
Alarm Closure Contacts
The SSU-2000e shelf has two filtered DA15P male connectors that are electrically
tied to the alarm relay contacts on the Communications module. One connector
(labeled J1) is designated the local alarm connector and the second connector
(labeled J2) is the remote alarm connector.
Each connector provides connections for normally open (NO), common or wiper
(COM) and normally closed (NC) for each of the following alarm categories:
CRITICAL – Indicates an immediate, service-affecting condition that requires
immediate user intervention, such as loss of the Communications module, loss of
input power to the shelf, and so forth.
When a critical alarm condition is detected, the CRITICAL ALARM relay is
activated (the alarm condition) and the CRITICAL ALARM indicator (LED) on
the front of the Communications module turns red unless both power inputs
are interrupted. In this case the unit is not running.
MAJOR – Indicates a condition that may require immediate user intervention.
When a major alarm condition is detected, the major alarm relay at the back
of the SSU-2000e is activated and the MAJOR ALARM indicator (LED) on
the front of the Communications module turns red.
MINOR – Indicates the unit performance may be degrading.
The minor alarm relay is activated and the MINOR ALARM indicator (LED)
turns on.
36 SSU-2000e User's Guide
Plug-in
Group
Module Slot
A6 1
A7
A8 2
A9
A10 3
A11
Output Connector
(Module Port)
Reference Description
J40 (1) through J59 (20)
J60 (1) through J79 (20)
J80 (1) through J99 (20)
12713140-002-2 Revision E – October 2006