Cisco MDS 9100 Series Hardware Installation Manual page 23

Chapter 2 Installing the Cisco MDS 9148S Switch
•
Ensure there is adequate space around the switch to allow for servicing the switch and for adequate
airflow (airflow requirements are listed in
•
Ensure the air-conditioning meets the heat dissipation requirements listed in
Specifications."
•
Ensure the cabinet or rack meets the requirements listed in
Installation."
Note
Note
•
Ensure the chassis is adequately grounded. If the switch is not mounted in a grounded rack, we
recommend connecting both the system ground on the chassis and the power supply ground to an
earth ground.
•
Ensure the site power meets the power requirements listed in
Specifications."
power failures.
Caution
•
Ensure that circuits are sized according to local and national codes.
For North America, the 300-W power supplies require a 20-A circuit. If you are using a 200- or
240-VAC power source in North America, the circuit must be protected by a two-pole circuit
breaker.
Caution
•
As you install and configure the switch, record the information listed in the
Maintenance Records" section on page
•
Use the following screw torques when installing the switch:
–
–
–
–
–
OL-20185-01
If the front cabinet mounting rails are not offset from the front door or bezel panel by a minimum
of 3 inch (7.6 cm), and a minimum of 5 inch. (12.7 cm) if cable management brackets are
installed on the front of the chassis, the chassis should be mounted rear-facing to ensure the
minimum bend radius for fiber-optic cables. See the
Insufficient Front Clearance" section on page
Jumper power cords are available for use in a cabinet. For more information, see the
Power Cord" section on page
If available, you can use an uninterrupted power supply (UPS) to protect against
Avoid UPS types that use ferro-resonant technology. These UPS types can become unstable
with systems such as the Cisco MDS 9000 Family, which can have substantial current draw
fluctuations because of fluctuating data traffic patterns.
To prevent loss of input power, ensure the total maximum loads on the circuits supplying
power to the switch are within current ratings for wiring and breakers.
Captive screws: 4 in-lb
M3 screws: 4 in-lb
M4 screws: 12 in-lb
10-32 screws: 20 in-lb
12-24 screws: 30 in-lb
Appendix 1, "Technical
"Installing the Switch in a Cabinet with
2-21.
1-6.
1-1.
Cisco MDS 9148S Multilayer Switch Hardware Installation Guide
Preinstallation
Specifications").
Appendix 1, "Technical
Appendix 1, "Cabinet and Rack
Appendix 1, "Technical
"Site Planning and
"Jumper
2-17