D-Link DGS-1520-28MP Product Manual 1 - Page 15
Smart Fans, Module, Low Speed, Medium Speed, High Speed
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DGS-1520 Series Gigabit Ethernet Smart Managed Switch Hardware Installation Guide Smart Fans The DGS-1520 Series Switches includes smart fans that will automatically change their speed depending on the internal temperature detected by the sensors built-in the Switch's hardware. The following table lists at what temperature the speed of the fan(s) will change: Module Low Speed Medium Speed DGS-1520-28 Below 30°C Above 33°C / Below 37°C DGS-1520-28MP Below 30°C Above 33°C / Below 37°C DGS-1520-52 Below 30°C Above 33°C / Below 37°C DGS-1520-52MP Below 30°C Above 33°C / Below 37°C High Speed Above 40°C Above 40°C Above 40°C Above 40°C For example, if the temperature rises from below 30°C to above 30°C, the fan speed will remain low. If the temperature rises to above 33°C, the fan speed will increase to medium. If the temperature drops from above 33°C to below 33°C, the fan speed will remain in the medium. If the temperature drops to below 30°C, the fan speed will decrease to low. 10
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