I have a WiFi module until now I supplied through a PoE injector. According to the documentation the WiFi module voltage requirement is the following:
12V Passive PoE (accept up to 22V). I also have the following PoE Plus switch:
It complies to IEEE 802.3at PoE standard and is
backward compatible to IEEE802.3af. It can power
both existing 10/100Base-T network devices and
emerging wireless 1000Base-T devices such as Wi-
MAX and wireless IEEE 802.11n access points.
Today I plug in the WiFi module to the PoE plus port, but it didn't work. After that I check this standards on the wiki and I found the following table:
Property 802.3af (802.3at Type 1) 802.3at Type 2 Power available at PD[note 2] 12.95 W 25.50 W Maximum power delivered by PSE 15.40 W 34.20 W Voltage range (at PSE) 44.0–57.0 V 50.0–57.0 V Voltage range (at PD) 37.0–57.0 V 42.5–57.0 V
For me it's not really clear this PSE and PD. So I can't replace the injector with this switch?