Hello,
just got my delivery with the OTD500 Outdoor Access Point and an additional PR324EUB PoE Device.
Now the OTD500 doesnt want to boot or even receive power? The PoE Injector lights up with LAN Led, but the PoE Light doesnt show up. However, listed as compatible device is the PR325EUB but this one should also be sufficient?
I do have another PoE Injector for the RUTX11 that i could test with the OTD. Is that one compatible?
Seems like the PR324EUB has only 24V while the PR325EUB has 56V.
Guess thats the reason 
Just staring at PoE Mode B all the time made me overlook this fact.
If someone has an alternative, please share with me, the PR325EUB is hard to get in germany.
Does the PR322EU7 also work? But that one is Power mode A 
Datasheet of the OTD500 says only Alternative B for the Output, so Input could be Alternative A as well?
Hello @Manni,
As already stated, and I assume you understand, the OTD500 requires a 42.5–57.0 VDC input voltage for powering up.
Additionally, it must be powered using an active PoE injector that supports the 802.3af/at standard. The PR324EUB PoE adapter is a passive PoE device, providing a maximum voltage of 24 VDC, which explains why it is not able to power the OTD500.
Please also ensure that the injector belongs to Alternative B mode, as Alternative A delivers power over the data (Tx, Rx) pairs, which is not suitable for this device.
Best regards,
So this one should work?
DIGITUS DN-95103-2
DIGITUS Gigabit Ethernet PoE+ Injektor, 802.3at, 30 W
Gigabit Ethernet PoE+ Injector, 802.3at Power Pins:4/5(+),7/8(-), 30W
Entspricht dem 802.3at PoE+ und dem 802.3af PoE Standard
Ausgangsspannung: 55 V DC
Then you might want to correct the datasheet, because it shows only variant B for the PoE Output, not for the input. Thats why i did guess the input could accept variant A or B.
Hello,
According to the specifications of this third-party PoE adapter, I believe it should work. However, please note that this particular injector has not been officially tested with TRB500.
Best regards,
For any others searching this topic: The mentioned PoE Injector is working with OTD500 
I was disappointed that the OTD500 POE-Output is ‘802.3af Alternative B’ only. This means you cannot daisy-chain any Ubiquiti Access Points [twigs or disks] as they only work on ‘Alternative A’. I don’t know why the OTD can’t auto-sense like any other device. It’s an expensive piece of kit and it should be able to auto-negotiate the two standards.
This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.
