Can the ESW-520-8P-K9 supply enough POE to support 7 PVC2300 cameras? If not, what are it's limitations?
The ESW 520 8-port has a maximum power of 15.4W to any 10/100 port; 60W total.
The ESW 540 8-port has a maximum power of 15.4W to any 10/100/1000 port; 123W total.
Per the PVC2300 datasheet, each camera has a power consumption of 10W.
If you need all 7 cameras supported, you might want to consider the ESW540 8-port. Another option is to power the cameras via the external power adapter, assuming a power source is nearby.
Hope this helps.