.375 amp per wire. So .750 amp per pair. At least that is what I think I finally settled on.
From: Adam Moffett Sent: Tuesday, May 08, 2018 10:53 AM To: [email protected] Subject: Re: [AFMUG] crowdsource troubleshooting If that's right, would that mean 0.5amp on 4&5 and 0.25amp on 3&6,7&8 ? Is it a 0.5amp fuse? ------ Original Message ------ From: "Jeremy" <[email protected]> To: [email protected] Sent: 5/8/2018 11:42:35 AM Subject: Re: [AFMUG] crowdsource troubleshooting No, that is not true, it adds an additional ground on 3&6. So to obtain a gigabit connection you have + on 4&5 and - on 3&6, 7&8. All of the present day UBNT gear is like this since they added gigabit Ethernet. When we upgrade we add a jumper to 3&6 to get it to negotiate at gigabit, but they seem to operate at 100FDX without it. On Tue, May 8, 2018 at 9:30 AM, Jacob Turner <[email protected]> wrote: The Prism Gen 2 uses "standard" UBNT passive 24v POE. +4,5 -7,8. I've seen netonix switches claiming as much as 12 watts draw from one when running. I wouldn't be surprised if their startup draw may be a bit higher. On Tue, May 8, 2018 at 8:16 AM, <[email protected]> wrote: I need help in understanding a product failure. I have now had two customers with similar failures in my POE fuse product. The fuses are blowing. So far it is limited to the fuses on pins 4/5. One customer is using: UBNT 5AC Prism Gen 2 radio, Mikrotik 411 boards, using both poes and netonix as the power supply. What pins and polarities does that radio use for POE? How much current? I may need higher rated fuses or slower fuses. But I can only go so high before it is not protecting Netonix thus becoming an expensive CAT5 splice. My ideas so far: I need a slower reacting fuse. I need a higher amp rating fuse. (not sure how high I can go and still protect Netonix) Some loads have unanticipated currents on those wires. Plugging in when powered may cause a connection sequence problem where if pin 4 makes contact first the whole load will go through that wire and blow that fuse.
