Simple question. Can you power the 4625 SM with 24V 1Amp 2-wire Poe power?
I have a client that is on AirmaxAC now and due to setup has a UI Nanoswitch between the CPE and the power supply. The Nanoswitch is also running a private PtP link to his garage.
If I were to upgrade him and use the Cambium 56V 15W power supply it would not work with the Nanoswitch or the PtP radio.
Can I keep the Nanoswitch and power it and the 4625 SM with a 24V 1A (24W) power supply?
I am able to power a 4525 on the bench with a UI 24V 1A power supply, but what are the risks powering it this way?
I was also able to power it with a 24V 1.6A Mikrotik power supply.
We have at least 5~6 4625 out in the field powered via 24v .5A POE out on Mikrotik HAP ac3 routers. They have all worked fine for months at this point. It does not appear that the 4625 has the built-in heater that the 4600c/l has, so power draw isn’t as much of a concern.
We have also powered 4625 (and 4525s) with 24v using Netonix, Mikrotik PB Pro and the “standard” Cambium POE 30v power supplies with zero issues to date.
I have a PTP link of two pieces of ePMP 4625 that are powered by 24 VDC and work perfectly.
This device is not a big power user, so any POE at 24 VDC is sufficient.
Greeting
I think the datasheet lists the minimum voltage as 44v or thereabouts. If any of you are having success running them with 24v that doesn’t mean that the devices are functioning properly though they may be. I would verify with Cambium Networks about that. It also does not mean that if they push out something like a v2 of the same model the newer power supply would work with 24v if these are working correctly perhaps done by companies at times because of things like tariffs making parts cost more or obsolete parts requiring a little different v2 of the same product but meeting all the same specs as a goal often. Weird problems can occur when voltages are out of spec but the device itself doesn’t have a low-voltage disconnect. Potentials include the RF chipsets not working as planned but appearing to work. Another might be needing CPU processing for some scenarios that cannot be met because of under-voltage affecting the “power supply” in the device. IT WOULD NOT BE GOOD FOR THE WISP COMMUNITY TO EVER GET IN A SPOT WHERE OUR RADIOS APPEAR TO BE WORKING FINE BUT ARE TRANSMITTING OUT OF BAND IMO. I am not saying I think this is happening here but would caution that double checking with Cambium directly would be a good idea from my perusing of documentation on these though I don’t use them. myself at this point.
I have been powering devices with DC sources for years. I assume that a reasonable voltage drop from 100 meters max of Cat5e has likely been accounted for so if the spec sheets read a minimum of X volts it might be reasonable to run the math and figure out what the drop in voltage would be and make sure my powering option at the device is the same or higher than the X volts minus the expected drop from 100 meters of Cat5e which can be substantial though I’m not doing the math right now. Many free websites have this info though they don’t account for the fact that a twisted pair 100 meters is more than 100 meters depending on the twists per length.
I respect that you advise double checking and triple checking is preferred.
I dismantled the force 325 and mounted the force 4625 in its place.
Likewise, on the other hand, I did not change the power supply, it was 24 V and remained 24 V.
Utp cable is about 40 m CAT 6a. Everything works perfectly.
Ethernet works perfectly at 1Gbps, while on the force 325 it failed to work except at 100 Mbps.
And now a little electronic design.
Each ePMP 1K, 2K, 3K and 4K has an SMPS step down voltage converter at the input part where the power is supplied via UTP cable, which has a huge input voltage range, typically 8-30V or 22-60V.
The output is mostly 5V (perfectly stabilized), then 3.3V, 1.8V, etc
This step-down converter design allows the device to operate at 24 V.
I don’t know if 100 m of UTP cable and 24 V would work, but I know that at 40 it works perfectly.
I also have a lot of force 180 and force 200 that have been running on 12V for years.
Greeting
FYI: This is the document I was referring to → https://brandcentral.cambiumnetworks.com/m/e1aa7c6c90f854f/original/Cambium_Networks_data_sheet_ePMP_Force_4625_SM.pdf.