Nortel SL-100 Product Manual page 132

132 Cabinet modular hardware
The Office Alarm Unit (OAU) provides alarm control and the CPDC services
as the interface between equipment lineups and the OAU. The OAU is
located in the first Cabinetized Trunk Module Equipment (CTME).
The CPDC provides a common product for numerous applications in both
hosts and remotes. It also provides a compact configuration for small
applications with the option for seamless growth. The CPDC provides
Electromagnetic Interference (EMI) compliance at the system level for all
power distribution and at the cabinet level for all input power cabling.
Cabling
The DC power plant for the office supplies power to the CPDC at a nominal
voltage of -48 V through separate battery feeders, A and B. (The power
is returned from each CPDC to the power plant through battery return
conductors, which are the same size as the battery feeders.)
The power is then distributed from the fuse/breaker panels in the CPDC to
the Frame Supervisory Panels (FSPs) in the various equipment frames in
the lineup through secondary battery feeders. It is returned to the CPDC
through return feeders of the same size.
Required DC voltages other than -48 V are obtained from DC-DC converters,
which are powered from -48 V and located within each equipment frame.
The CPDC accepts external cabling with either top or bottom entry. Internal
cabling for all loads, except for those in an NT9X01 or NT9X95AA style
cabinet, exit and enter through the side of the cabinet. The NT9X95AA
style cabinet accepts horizontal cabling. Feeds for the NT9X01 cabinet
exit by way of feedthrough filter capacitors located on the NTRX31AA
EMI bulkhead and route externally to these cabinets. Conversion to the
NT9X95AA style eliminates the NT9X01 external power filters.
Frame Supervisory Panel
The FSP includes a frame fail light mounted at the top of the front of the
cabinet and an electrostatic discharge wrist strap, located in the front.
Power Distribution Shelf
The Power Distribution Shelf (PDS) provides wiring and circuit breaker
protection to distribute power to the Meridian SL-100 system. The CPDC
distributes up to a maximum of 200 A of 48 V DC power on each of its
separate A and B buses.
A recommended 250 A power board fuse provides overload protection.
Distribution of the bulk DC power to equipment loads is by way of 30 A
circuit breakers.
Copyright © 2006, Nortel Networks
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Communication Server 2100
Meridian SL-100 Product Guide
555-4001-103 20.01 Standard
SE09 20 October 2006
Nortel Networks Confidential