Here is the formula calculating the necessary power supply unit:
Ppower supply unit = Pswitch + ((N*Pdevices) + 30%)
N – number of connected devices
30% - recommended reserve
Here is the formula calculating the necessary power supply unit:
Ppower supply unit = Pswitch + ((N*Pdevices) + 30%)
N – number of connected devices
30% - recommended reserve
Calculation example for IKS-6728A-8PoE-4GTXSFP-48-T switch
The power consumption of the switch under full load:
0.53 A at 48 V DC = 25.44 W
The power consumption of the connected PoE+ devices (standard of up to 30V, maximum of up to 36V):
Pdevices = 8 * 30 = 240 V
Recommended reserve: 30%
Ppower supply unit = 25,44 + (240 + 30%) = 337,44 W