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  • 1.  AP-505H PoE Power consumption.

    Posted Aug 30, 2021 02:00 PM
    Hello.

    I plan to propose the following configuration diagram to the customer as AP-505H.

    - network diagram
     


    However, the partner distributor said that the device needs 50W when connected via PoE.

    I don't think 50W is necessary. I think it will work within 25W which is PoE+(802.3at), but I'm not sure.

    The AP LAN port does not require PSE function. I just want to connect and use 4 PCs.

    We need a definitive answer.




    I'm checking the datasheet and ...................
    (https://www.arubanetworks.com/products/wireless/access-points/remote-hospitality-access-points/500h-series/)

    Among the contents...

    When powered by 802.3at (class 4) PoE with the IPM feature disabled, the AP will disable the USB port (only) if PoE-PSE is enabled, and support (802.3af) PoE-PSE power on E1 only (no PSE on E2).

    Maximum (worst-case) power consumption (without USB or PSE / max):
    DC powered: 14W / 50W
    PoE powered (802.3bt): 14W / 51W
    PoE powered (802.3at): 14W / 25.5W
    PoE powered (802.3af): 13.5W / 13.5W




    Thank you in advance.

    ------------------------------
    JK Kim
    ------------------------------


  • 2.  RE: AP-505H PoE Power consumption.

    Posted Aug 30, 2021 02:07 PM
    You are good with 802.3AT / POE+ especially if the wired ports on the AP don't need to serve as PSE - and assuming you dont need to use the USB port.


  • 3.  RE: AP-505H PoE Power consumption.

    Posted Aug 30, 2021 05:12 PM
    Hi,

    If you want to have both downstream poe ports provide poe, or power a .at device with poe, you need a .bt capable switch. If not, .at is just fine.


    having ãround 500 of those 505H in my network, I can confirm they do not require 50W. With both radios operational (20dbM @ 5GHz, ~13dBm @ 2.4GHz), usb disabled and providing poe passthrough to a basic ip phone (grandstream gxp1615), they are all at around 8-9W of actual power reservation including the phone.

    Here's an excerpt from the switch
    # show power-over-ethernet brief

    Member 1 Power Status
    Available: 740.00 W Reserved: 410.06 W Remaining: 329.94 W
    Always-on PoE Enabled:1/1
    Quick PoE Enabled:None

    PoE Pwr Power Pre-std Alloc PSE Pwr PD Pwr PoE Port PD Cls Type
    Port Ena Priority Detect Act Rsrvd Draw Status Sign
    -------- --- -------- ------- ------------- ------- ------ ------------ ------ --- ----
    1/1/1 Yes low Off lldp-dot3 9.2 W 8.5 W delivering N/A 4 2
    1/1/2 Yes low Off lldp-dot3 8.5 W 7.9 W delivering N/A 4 2
    1/1/3 Yes low Off lldp-dot3 8.2 W 7.7 W delivering N/A 4 2
    1/1/4 Yes low Off lldp-dot3 8.2 W 7.6 W delivering N/A 4 2
    1/1/5 Yes low Off lldp-dot3 8.4 W 7.8 W delivering N/A 4 2
    1/1/6 Yes low Off lldp-dot3 8.2 W 7.6 W delivering N/A 4 2
    1/1/7 Yes low Off lldp-dot3 8.8 W 8.2 W delivering N/A 4 2
    1/1/8 Yes low Off lldp-dot3 8.5 W 7.9 W delivering N/A 4 2
    1/1/9 Yes low Off usage 8.8 W 8.2 W delivering N/A 4 2
    1/1/10 Yes low Off lldp-dot3 7.5 W 7.0 W delivering N/A 4 2
    ...


    ------------------------------
    Greetings, Stephan Westphal
    ------------------------------

    Original Message


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