Can a WS-C3560E-24PD-S switch with a C3K-PWR-750WAC power supply, provide enough power to supply enhanced PoE of 20 watts (Power draw of access point per data sheet of model 1252 Wireless access Point with 2 radios) for all 24 ports simultaneously?
If not, how does it work? 4 ports get nothing? All ports get less power? Circuit breaker pops?
I'd appreciate it if any answer gets supported by showing calcs and/or pointing to spec sheets - as I need this information for our engineering design basis.
Thanks in advance...
20 x 24 = 480W.
PS is 750W.
Data sheet says:
• Enhanced PoE supporting up to 20W of PoE per port
• Industry first portfolio to scale beyond 15.4W per port delivering maximum solution simplicity for 802.11n access point deployments
It will work no problems
Thanks for the replies!
From the switch spec sheet in table 5 "Power Specifications" under the conditions: "100% Throughput (With Maximum Possible PoE Loads)", the measured power consumption for the switch itself is: 502 watts
Under this condition: Switch itself + 24 ports of EPoE power sourcing
502 watts + (24 * 20 watts)
502 watts + 480 watts = 982 watts
982 watts > 750 watt rating of the power supply
So what happens under these conditions?
Even for this load condition for normal PoE (15.5 watts per port) from the spec sheet Table 5 "Power Specifications" again:
Measured Power Consumption is: "502 Switch and 372 PoE Power"
372 = 15.5 * 24
So even under this condition, power consumption is (502+372) = 874 watts, which appears to be above the 750 watts available.
WS-C3560E-24PD-S switch with a C3K-PWR-750WACThat should be no problem. Upgrade your IOS to 12.2(46) to enable enhanced PoE.