Cisco BPX 8650, Installation And Configuration Manual

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 2 BPX Switch Physical Overview
BPX Switch Enclosure
Figure 2-2 BPX Switch Exterior Rear View
Node DC Powering
The primary power for a BPX switch node is -48 VDC, which is bused across the backplane for use by
all card slots. DC-to-DC converters on each card convert the -48V to lower voltages for use by the card.
The -48 VDC input connects directly to the DC Power Entry Module (PEM). The DC Power Entry
Module (see Figure 2-3) provides a circuit breaker and line filter for the DC input.
Nodes may be equipped with either a single PEM or dual PEMs for redundancy. PEMs are mounted at
the back of the node below the backplane. A conduit hookup box or an insulated cover plate is provided
for terminating conduit or wire at the DC power input. It is recommended that the source of DC for the
node be redundant and separately fused.
14
13
12
11
10
7 BCC-A
8 BCC-B
6
9
15 ASM
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
LM–
3/T3
5
4
3
2
1
Fans
Slot #15
Slot #1
Back
Cards
Air
Exhaust
H8017