Manuals / Cisco Systems / Computer Equipment / Switch

Cisco Systems 8600 Series manual Node Cooling, Node DC Powering

Models: 8600 Series

1 424
Download 424 pages 24.57 Kb
Page 59
Image 59

Physical Description

Figure 2-2 BPX Switch Exterior Rear View

Fans

Air

Exhaust

Slot #15

Back

Cards

LM–

 

 

 

 

 

3/T3

LM–

 

 

 

 

15ASM

3/T3

LM–

 

 

 

 

3/T3

LM–

 

 

 

14

13

3/T3

LM–

 

 

 

12

3/T3

LM–

 

 

 

 

3/T3

Slot #1

11 10

LM–

 

 

 

3/T3

LM–

 

 

 

3/T3

LM–

 

9

8BCC-B

3/T3

LM–

 

7BCC-A

3/T3

 

 

 

 

 

 

6

LM–

 

 

 

3/T3

LM–

 

 

 

3/T3

LM–

 

5

 

3/T3

LM–

 

4

 

3/T3

 

 

3

 

 

 

 

2

– 3

H8017

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.

General Description 2-3

Page 58 Page 60
Page 59
Image 59
Cisco Systems 8600 Series manual Node Cooling, Node DC Powering
Page 58 Page 60