Nortel DMS 100 Series Maintenance Manual page 24

2-8 Maintenance overview
Power requirements
range from -42V through -75V is acceptable. The maximum input current is
30A.
Output
specifications.
Table 2-5 NTRX43AA output specifications
Parameter
Maximum voltage
Maximum current
Minimum voltage
Minimum current
Breaker module
The system provisions the breaker module (NTRX42AA) circuit card with an
MSP. This circuit card contains two circuit breakers -48V or -60V that provide
two 10-A power feeds.
The NTRX42AA circuit card receives two input feeds from the PDC. The
circuit card allows the two front-mounted breakers on the card to limit the
input current. Breakers have automatic recovery from low battery (ARLB),
and the standard DMS switch converter interface. These features allow the
breakers to monitor converters.
The NTRX42AA circuit card
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•
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The NTRX42AA circuit card has the following functional blocks:
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297-8223-550 Standard 04.02 November 2000
The following table shows NTRX43AA circuit card output
monitors and detects converter failures
trips breakers when over-current conditions exist
trips breakers on converter failure
provides termination points for PDC feeds
provides battery feed samples for an alarm module
responds to ARLB conditions
ARLB
trip circuits and enable
breakers
The nominal input voltage is -48V or -60V, but a
Value
-72V
5.0A
-42V
0.18A