Nortel Networks OPTera Metro 3500 - Manual (Page 270)

3-42 Hardware feature descriptions
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
20 A (Universal) power module
(NTN451HA)
The OPTera Metro 3500 Universal Shelf supports the Universal power module
(NTN451HA).
The power modules in slots 1b and 1c provide the required -48 V dc interface
to power the shelf. The power module in slot 1b is called Power A and the
power module in slot 1c is called Power B. The interfaces have circuit breakers
to protect the A and B power rails.
See Table 3-3 on page 3-6 for operational temperature ranges.
Figure 3-25
Universal power module (NTN451HA)
EX0781
OPTera Metro 3000 breaker interface panel (BIP)
(NTN458RA)
The breaker interface panel (BIP) NTN458RA is mounted at the top of the
OPTera Metro 3500 equipment frame and supports four breakers at 20 A, three
breakers at 5 A, and one breaker at 15 A. NTN458RA is rated for operation in
the temperature range of -10
° C to +60 ° C. The BIP can accommodate four
OPTera Metro 3500 shelves, eight DSMs or any combination of OPTera Metro
3500 and DSMs which does not exceeding 80 A.
Cooling fan
power connector
Shelf power
connector
Return
-48 V
Power switch