Cisco SFS-7012 User Guide - Page 35
Power Requirements, Power Supply, Uninterruptible Power Supply
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Chapter Figure 2-3 Bend Radius Measurement Diagram • Support cable using a cable manager mounted above connectors to avoid unnecessary weight on the cable bundles. • Bundle cables using velcro straps to avoid damaging cables. • Keep all ports and connectors free of dust. • Unshielded Twisted Pair (UTP) cables can build up Electrostatic Discharge (ESD) charges when being pulled into a new installation. Before installing category 5 UTP cables, discharge ESD from the cable by plugging it into a port on a system that is not powered on. • When required for safety and fire rating requirements, plenum-rated cable can be used. Check the local building codes to determine when it is appropriate to use plenum-rated cable, or refer to IEC standard 850. Power Requirements Power Supply • The switch power supplies have a maximum power consumption requirement of 350W. Also ensure that the site meets all power supply requirements. • Before installation and periodically after installation, check that the site is receiving clean power. Install a power conditioner if necessary. • Be sure the site is properly grounded to avoid damage from lightning and power surges. Uninterruptible Power Supply Consider the following when selecting Uninterruptible Power Supply (UPS) equipment: • The minimum amperage requirements for a UPS: - Calculate VA (Volt-Amps): Locate the voltage and amperage requirements for each piece of equipment (usually located on a sticker on the back or bottom of the equipment). Multiply the numbers together to get VA. - Add the VA from each piece of equipment together to find the total VA requirement. Then add 30% to determine the minimum amperage requirements for the UPS. • Transition time (the time necessary for the UPS to transfer from utility power to full-load battery power). • The longest potential time period the UPS might be required to supply backup power. • Whether or not the UPS unit also provides online protection. OL-8787-04 Cisco SFS 7012 InfiniBand Server Switch Hardware Users Guide 17