Cisco CATALYST 4500 7 SLOT CHASSIS FAN NO POWER SUPPLY REDUNDANT SUPCAPABLE 仕様ガイド

Although a class 3 device needs 15.4 W to power up, 17.3 W need to be generated 
from the backplane in order to have 15.4 W at the switch port. 17.3 W comes from 
the WS-X4248-RJ45V DC-DC converter’s efficiency (89%).

 lists the site-planning activities that you should complete before you 

install a Catalyst 4500 series switch. Completing each activity helps to ensure a 
successful switch installation.

1 - IEEE class 3 device

17.3 W

                                 total output power  284 W

Total heat dissipated by system = (284/.75) * 3.415 = 1293 BTUs/hr

1

Space evaluation:

Space and layout

Floor covering

Impact and vibration

Lighting

Maintenance access

2

Environmental evaluation:

Ambient temperature

Humidity

Altitude

Atmospheric contamination

Airflow