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Chassis and Power Supply Specifications A-3
DC-input voltage
Typical range
(U.S. and Canada)
Typical range
(international)
Rated –48 to –60 VDC continuous
Rated –48 VDC (nominal) –56 VDC (high) –42 VDC (low)
Rated –60 VDC (nominal) –72 VDC (high) –52 VDC (low)
Heat dissipation 1800 W (6140 Btu/hr)
1 lfm = linear feet per minute
2 UL = Underwriters Laboratories
3 CSA = Canadian Standards Association
4 EN = European Norm
5 IEC = International Electrotechnical Commission
6 TS = Technical Standard
7 AS/NZS = Australian/New Zealand Standard
8 EMI = electromagnetic interference
9 LightStream 1010 port adapters installed in a Catalyst 8540 MSR chassis may not be EMI compliant. An EMI strip ships with the
chassis for installation on the port adapters to meet EMI compliance.
10 FCC = Federal Communications Commission
11 ICES = Interference-Causing Equipment Standard
12 VCCI = Voluntary Control Council for Information Technology Equipment
13 UTP = unshielded twisted-pair
14 FTP = foiled twisted-pair
15 Btu = British thermal units
Table A-1 Chassis and Power Supply Specifications (continued)
Description Specifications