2-3
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 2 BPX Switch Physical Overview
BPX Switch Enclosure
Figure 2-2
BPX Switch Exterior Rear View
Node Cooling
A fan assembly with three six-inch 48 VDC fans is mounted on a tray at the rear of the BPX switch
shelf (see Figure 2-2). Air for cooling the cards is drawn through an air intake grille located at the
bottom in the front of the enclosure. Air passes up between the vertically-mounted cards and exhausts
at the top, rear of the chassis.
All unused slots in the front are filled with blank faceplates to properly channel airflow.
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
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5
4
3
2
1
Fans
Slot #15
Slot #1
Back
Cards
Air
Exhaust
H8017
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
Страница 564: ......
Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...