A-3 Pin Assignments For The Co Alarm System Outputs - Paradyne 3000 Installation Manual

COMSPHERE –48 Vdc Central Office Power Unit
CO Alarm System Outputs
Both major (power) and minor (fan) alarms can be sent
to the CO alarm system via the Alarm A and Alarm B
output connectors. Figure A-1 illustrates these connectors.
The connector on the CO Power Unit's backplane is an
AMP 5-position single row header. The mating connector
is an AMP MTE-type connector (part number 103957-4).
The CO alarm system outputs are relay contact
closures. Table A-3 lists the pin assignments for the CO
alarm system outputs.
Table A-3
Pin Assignments for the
CO Alarm System Outputs
Pin Number
1 Major Alarm (power failure)
2 Major Alarm (power failure)
3 No Connection
4 Minor Alarm (fan failure)
5 Minor Alarm (fan failure)
A-4
Assigned To ...
October 2002
A contact closure is provided between Pin Numbers 1
and 2 to indicate a power failure. A contact closure is
provided between Pin Numbers 4 and 5 to indicate a fan
failure. Note that a major alarm signal is sent to a CO
alarm system upon a failure in either the – 48V input or
low voltage output circuits, and that a minor alarm signal
is sent if the fan speed falls below 1900 rpm.
CAUTION
The relay contacts on the CO
Power Unit for the CO alarm
system have a rating of
0.1 amp maximum at 70 Vdc
maximum.
3000-A2-GB41-50