4-4
Cisco SCE8000 Installation and Configuration Guide, Rel 3.1.7
OL-16478-03
Chapter 4 Installing the Cisco SCE8000 Chassis
Preparing for Installation
Power Requirements
Warning
Read the installation instructions before connecting the system to the power source.
Follow these requirements when preparing your site for the Cisco SCE8000 installation:
• The redundant power configuration provides a second, identical power supply to ensure that power
to the chassis continues uninterrupted if one power supply fails or input power on one line fails.
• Connect each of the two power supplies to a separate input power source. If you fail to do this, your
system might be susceptible to total power failure due to a fault in the external wiring or a tripped
circuit breaker.
• To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and breakers.
• In some systems, you might use an uninterruptible power supply (UPS) to protect against power
failures at your site. Avoid UPS types that use ferroresonant technology. These UPS types can
become unstable with systems like the Cisco SCE8000, which can have substantial current draw
fluctuations due to bursty data traffic patterns.
Power Connection Guidelines
This section provides the guidelines for connecting the Cisco SCE8000 AC and DC power supplies to
the site power source.
• AC-Powered Systems, page 4-5
• DC-Powered Systems, page 4-11
• Site Planning Checklist, page 4-12
Table 4-2 Ambient Temperature and Humidity Requirements for the Cisco SCE 8000
Specification Acceptable Range
Temperature Nominal: 32°F to 104°F (0°C to 40°C)
Storage: -4°F to 149°F (-20°C to 65°C)
Relative humidity Operating: 10% to 85%
Storage: 5% to 95% (non-condensing)
Heat dissipation
• Single SCE8000-SCM-E module:
–
AC Power: 950W / 3250 BTUs
–
DC Power: 1000W / 3450 BTUs
• Dual SCE8000-SCM-E modules:
–
AC Power: 1350W / 4600 BTUs
–
DC Power: 1430W / 4880 BTUs
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