Can the RB960PGS power a few AT devices if I give it enough POE in?
I need to drive to AT devices. If I used a 60 Watt POE injector… would that work?
60 watt per device? No.
The 2 devices are AT… so max would be 25 watts Each.
I have been using the EdgeSwitch 8-150 for years… but am trying to move to Tik switching for my core on up.
The limits are documented.
How do you deliver the 60 Watt ? “MT48-570080-11DG 57 V, 0.8 A power supply for long Ethernet cable runs”
“48POW 48V 1.46A 70W power adapter”???
“48V2A96W 48 V 2 A 96 W power supply with plug” (for hEX PoE!)
Or trying to do it with the included 24V 2.5A adaptor ?
How to read the limitations?
Max power for the AT devices is 54W - 6W is 48W (max power consumption limit - own consumption)
For 24V adaptors , the max power is 24W per port (1A) , 48W total (2A)
For 48V adaptors , the max power per Port is 21.6W (450MA) , total is limited by max power 48W consumption above. But maybe not , why did they add the “48V2A96W 48 V 2 A 96 W” as stronger unit replacing the “48POW 48V 1.46A 70W” ? Or is the extra power only for the CRS112-8P-4S-IN ??
For 57V the adaptor is limited , max power per port is 25,65W (450mA), 45W (800mA) total (power adaptor limit 0.8A)
The client device must be able to work with the offered voltage !
The RBGPoE injector is limited to 2A ! There is also some voltage loss on the UTP cables.
For power hungry devices a separate PoE injector could be used on that port (with hEX-PoE PoE-OUT disabled on that port), up to 2A
BPWL…
A few years ago a tech in the field took the POE injector off the UniF–K AP Pro and put it straight to the hEX POE.
Then the HexPOE worked, and an access point and CLOUD KEY powered right up.
Now moving on to my current systems…
I have a smattering of WiFi APs from NON UNIF–K manufactures. They are all AF/AT. So I have been able to use The ES8-150 for them as some devices actually changed from AF to AT after a software update.
EdgeSwitches have become harder and harder to come by. And with the line not getting any refreshing in years… I am worried it might go away.
CRS328-24P-4S±RM has proven to be a solid core switch… well after several firmware updates to get all its ports to work for more than 24 hours…
Moving to Tik switching… has the issue of sometimes you need something smaller than the 24Port POE. And the 8 port with 2 power supplies… it still a little clunky.
Hence why I wondered just how much POE I could put in to a hEXPOE and drive other devices.
I’ve never seen specification of maximum PoE-in current for any MT device.
Brochure for RB960PGS gives slightly more details about PoE-out:
On ports 2-5, Output: 1A max per port; 2A max total (12-30v), 450mA max per port; 1,8A max total (31-57v)
Using 48V power supply, the current limit of 1.8A over all PoE-out ports (4 ports, 0.45A each) translates to 86.4W. Which doesn’t correspond to “Max power consumption: 54W”.
Since RBGPOE is rated at 2A, I would assume that PoE-in ports would be able to take the same amount of current. 2A at 48V is 96W, subtract 6W of own power consumption (and slight voltage drop on input) and you approximately get the figure from previous paragraph.