Budgeting PoE Power
Advanced users can manually adjust the PoE power budget for each port to consistently accommodate the
cameras needed.
If you choose to manually adjust the PoE budget at each port, be aware that you must also account for
potential power loss in the cable. Unless the amount of power loss in the cable is known, use the following
estimates:
l
If the device uses less than or equal to (<=) 16 W — expect 2.5 W of power loss.
l
If the device uses more than (>) 16 W — expect 4.5 W of power loss.
To calculate the recommended power budget for each port, use the following equation:
Power budget =
<Camera power consumption>
+
<Expected cable power loss>
Example
: Connect the following 8 cameras to an 8-port device:
4 x HD dome cameras
( 9 W + 2.5 W) x 4 = 46 W
2 x HD PTZ camera
(25.5 W + 4.5 W) x 2 = 60 W
2 x HD micro dome
(4 W + 2.5 W) x 2 = 14 W
Total
= 120 W
Budgeting PoE Power
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