Cisco Systems WS-X6608-T1 用户手册
2-2
Ci sco Catalyst 4900M Swit ch I nst allati on Guide
78-18350-02
Chap ter 2 Si te Plan ning
Sit e Power Requirements
Coo ling air is drawn in thro ugh the right side and exhausted throu gh the left side of the chassis. Keep
th e sides and rear clear of o bstru ction s, including du st and fo reign co nductive material, and away from
th e ex hau st p orts of o ther eq uipment.
th e sides and rear clear of o bstru ction s, including du st and fo reign co nductive material, and away from
th e ex hau st p orts of o ther eq uipment.
lis ts the op eratin g and nonop eratin g enviro nmen tal site requirements for
th e switches. To maintain normal op eratio n and ensure hig h sy stem availability, main tain an ambient
temperature and EMI-free and continuou s p ower at yo ur site. Th e env ironmental ranges listed in
Appendix A are those within wh ich the switch will con tinue to op erate; however, a meas uremen t th at
approach es the minimum or maximum of a rang e ind icates a po tential problem. You can maintain normal
o peration by anticipating an d correcting environmental anomalies b efore they exceed the maximum
o perating range.
temperature and EMI-free and continuou s p ower at yo ur site. Th e env ironmental ranges listed in
Appendix A are those within wh ich the switch will con tinue to op erate; however, a meas uremen t th at
approach es the minimum or maximum of a rang e ind icates a po tential problem. You can maintain normal
o peration by anticipating an d correcting environmental anomalies b efore they exceed the maximum
o perating range.
Site Power Requirements
This section describes the installation site power requirements fo r the Cataly st 4 900M switch. Verify
y our site power befo re y ou install the switch.
y our site power befo re y ou install the switch.
This section consists of th e fo llowing sectio ns:
•
•
•
•
Preinstallation Requirements
Follow these requirements when preparing your s ite fo r the Cataly st 4 900M switch installatio n:
•
Con nect each switch to s eparate wirin g o n a dedicated circu it; p rovide each switch with its own
b ranch circuit co nnection with su fficien t overcurrent pro tection an d d irect groundin g to the b ranch
circuit.
b ranch circuit co nnection with su fficien t overcurrent pro tection an d d irect groundin g to the b ranch
circuit.
•
To prevent a loss of inp ut p ower, be sure the to tal max imum lo ad on each AC circu it is with in the
current ratings of th e wiring and breakers.
current ratings of th e wiring and breakers.
Warnings and Cautions
Follow these p recaution s when preparing y our site for th e Catalyst 490 0M switch installation:
Caution
The total maximum load on each AC or DC -input power circuit mu st be within the rating of the wirin g
and breaker. An overload o f input power can result if this requ iremen t is not met.
and breaker. An overload o f input power can result if this requ iremen t is not met.
Warning
Read t he installation inst ructions before connecting t he system to the power source. Stat ement 1004
Warning
Installation of the equipment must comply wit h local and national electri cal codes. Statement 1074