Agreed. I expect your issues will go away if you increase voltage. We run all ePMP @ 48VDC. It fixed these random rebooting issues for us.
On Sun, May 13, 2018 at 6:37 AM, Forrest Christian (List Account) < li...@packetflux.com> wrote: > 22.93 is too low. Cambium says 23V is the minimum into the radio. See > http://community.cambiumnetworks.com/t5/ePMP-Installation/ePMP-PoE- > Powering-Primer/td-p/49944 > > You need to subtract a bit of loss inside the injector, and then a bit > more for cabling. Plus a bit more for everything else. > > For verification, I took my bench ePMP and hooked it up to my power supply > - it doesn't even turn on until 22.5V at the radio. I'm sure other copies > are probably higher or lower. And I'm sure it changes with internal > temperature of the radio. > > One big difference between the PoE Injector and the SyncInjector is that > the syncinjector uses semiconductor switches which generally have a bit > more voltage drop than a relay. The tradeoff is that the semiconductor > switches can switch far more power than the relays can and can switch > quickly enough to do sync over power. > > > > > > On Sat, May 12, 2018 at 10:26 PM, Josh Luthman < > j...@imaginenetworksllc.com> wrote: > >> So we replaced all 8 surge cards. It's getting 22.95 and 22.93 for the >> two boxes (to the green terminal). Devices are still rebooting... >> >> Epmp never has problems with the same DC supply through the green POE >> injector, forgot to mention that. >> >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g> >> Suite 1337 >> <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g> >> Troy, OH 45373 >> <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g> >> >> On Sun, May 6, 2018 at 8:14 PM, George Skorup <george.sko...@cbcast.com> >> wrote: >> >>> Funny story if you were using ePMP near the beginning. Some of the first >>> original 5GHz integrated radios had labels marked 56VDC. They were >>> definitely NOT capable of being powered from 48/56V. Somebody screwed up. >>> >>> Yeah. We've run Force180/200 survey setups on a small 12V SLA too. It >>> works, but they're rated at 14 volts. Same with the 100 and 450 SMs. Still >>> works. However, I recall the regulator is very inefficient down that low. >>> Like the old 320 and 430 APs could be run on 24VDC, but you really didn't >>> want to do that, and Motorola/Cambium said it was completely unsupported. >>> >>> >>> On 5/6/2018 5:13 PM, Bill Prince wrote: >>> >>>> I had a portable 12V battery that I would use for site surveys with the >>>> old PMP100. I'm pretty sure they would function in the 8-10V region. >>>> >>>> I know nothing about the ePMP radios. Trust George. >>>> >>>> >>>> bp >>>> <part15sbs{at}gmail{dot}com> >>>> >>>> On 5/6/2018 2:33 PM, George Skorup wrote: >>>> >>>>> Original 5GHz integrated and connectorized are 14-30VDC, -4/5 +7/8 >>>>> only. >>>>> >>>> >>>> >>> >> > > > -- > *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 > <https://maps.google.com/?q=3577+Countryside+Road,+Helena,+MT+59602&entry=gmail&source=g> > forre...@imach.com | http://www.packetflux.com > <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> > <http://twitter.com/@packetflux> > >
