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Catalyst 8540 Chassis Installation Guide
2-4
The following warnings apply to DC power supplies:
Warning A readily accessible two-poled disconnect device must be incorporated
in the fixed wiring.
Before connecting each unit, note its power consumption rating in Table A-1 in the
appendix “Chassis and Power Supply Specifications.”
Interference Considerations
When wires are run for any significant distance in an electromagnetic field, interference can
occur between the field and the signals on the wires. As a result:
• Bad plant wiring can result in radio frequency interference (RFI).
• Strong electromagnetic interference (EMI), especially when it is caused by lightning or
radio transmitters, can destroy the signal drivers and receivers in the chassis, and can
even create an electrical hazard by conducting power surges through lines and into
equipment.
Note To predict and remedy strong EMI, you might need to consult RFI experts.
Equipment Racks
A rack-mount kit is provided for mounting the chassis in a standard 19-inch (48 cm)
equipment rack. The rack-mount kit is not suitable for racks with obstructions (such as a
power strip) that could impair access to the processor and power supplies. Figure 2-1 shows
the chassis footprint and outer dimensions.