Dell PowerConnect J-8216 Hardware Guide - Page 104
Calculating the Number of Power Supplies Required for Your J-EX8216 Switch Configuration
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Dell PowerConnect J-Series J-EX8216 Ethernet Switch Hardware Guide To calculate the system thermal output: 1. Determine the maximum system power consumption of your switch in watts. See "Calculating the Power Consumption of Your J-EX8216 Switch Configuration" on page 86 for how to do so. 2. Multiply the maximum system power consumption by 3.41. For example, for a switch fully loaded with 8-port SFP+ line cards and using N+1 power redundancy with high-line input voltage, the system thermal output: = (maximum system power consumption) x (3.41) = (10667 W) x (3.41) = = 36,374 BTU/hr NOTE: Using the maximum system power consumption values to calculate the system thermal output often results in overprovisioning the cooling systems. Typical power consumption is about one-third lower than these calculated values. Calculating the Number of Power Supplies Required for Your J-EX8216 Switch Configuration Use this procedure to calculate the number of power supplies required by your switch configuration. The required power configuration for J-EX8216 switches is N+1. You can optionally configure your switch for N+N configuration. For example, you might want dual power feed redundancy with AC power supplies, which requires an N+N configuration. 88