9
•
Minimum total power consumption of the switch = Minimum total power consumption of the
m minimum power consumption of the fan trays.
•
Typical total power consumption of the switch = Typical total power consumption of the modules
+ typical power consumption of the fan trays.
•
Maximum total power consumption of the switch = Maximum total power consumption of the
m maximum power consumption of the fan trays.
For example, for an S10506X-G switch that has two LSEM1SUPA0 MPUs, two LSEM1GT48TSSD0
service modules, two LSEM1SF06D0 switch fabric modules, and two FAN-80B-4-A fan trays:
•
The minimum total power consumption of the switch is 2 × 22 + 2 × 28 + 2 × 55 + 2 × 30 = 270
W.
•
The typical total power consumption of the switch is 2 × 23 + 2 × 47 + 2 × 63 + 2 × 100 = 466 W.
•
The maximum total power consumption of the switch is 2 × 30 + 2 × 55 + 2 × 95 + 2 × 230 = 820
W.
Heat dissipation
Heat dissipation is measured in BTU/h, and 1 W equals 3.4121 BTU/h.
The heat dissipation of a switch depends on its power consumption. To calculate heat dissipation of
the switch, assume 90% power consumption is converted to heat, and the conversion efficiency of
the power supplies is 90%. Heat dissipation/hour of the switch is [ 0.9 × (total power consumption of
the modules plus power consumption of the fan trays) ] /0.9 × 3.4121.
Table 6 Heat dissipation
Switch module
Heat dissipation (BTU/H)
S10506X-G/S10506X-G-PoE
10216
S10508X-G
14843
S10512X-G
121405
Cooling
For adequate ventilation and heat dissipation, make sure the following requirements are met:
•
Make sure the airflow of the chassis matches the airflow direction of the installation site.
•
Reserve a minimum clearance of 30 cm (11.81 in) around the inlet and outlet air vents.
•
Make sure the rack for the switch has a good cooling system.
•
Make sure the installation site has a good cooling system.