Powering cambium force 300 CSML with 24V passive PoE

Products ePMP
1

Hi community,

I am trying to power on Cambium force 300 CSML and Cambium ePMP 1000 connecterized radio with 24V passive PoE. but we are facing problem if Sector (Antenna) are not connected then these radios are getting power on. but if we connect Sector with these radios then it don’t power on. checked with reverse polarity also but no suggestion. Can anybody have any suggestion on this ???

2

Hi @Gagan_Goyal ,

According to ePMP Force L Series Data Sheet for Passive PoE input voltage should be 30V, the same for ePMP 1000 Connectorized radio.

Seems 24V Passive PoE it just not enough to power on this radios.

3

Hi. What AMPerage is the power supply? If you don’t have the proper 30v power supply, you can also try with a higher amperage 24v supply. There’s no downside in having more AMPs too.. they are not ‘pushed’ they are simply ‘available to be drawn’ by the load.

So, using the proper power supply is the best plan, but if you don’t have the proper Cambium Power Supply, you can try a higher amperage 24v power supply and see if that makes a difference.

4

We are trying to power on the Force 300 CSML with a PoE switch. PoE switch input voltage is 48V, 5A. while on PoE port this switch support 24V passive PoE. So once we connect the cable from PoE port to cambium force 300 CSML then it don’t power on. If we remove the connectorized antenna of Force 300 CSML then it goes power on. Issue is only that with Antenna (Sector) it is not powering on. while all other radios of Cambium L series are powering on througfh this switch.

Any suggestion to over come this issue ???

5

We are trying to power on the Force 300 CSML with a PoE switch. PoE switch input voltage is 48V, 5A. while on PoE port this switch support 24V passive PoE. So once we connect the cable from PoE port to cambium force 300 CSML then it don’t power on. If we remove the connectorized antenna of Force 300 CSML then it goes power on. Issue is only that with Antenna (Sector) it is not powering on. while all other radios of Cambium L series are powering on through this switch.

Any suggestion to over come this issue ???

6

Need more details of the switch you’re using or pinout.

We have lots of Force 300 CSML powered by Ubiquiti and other brands passive POEs (usually if we’ve swapped them from Airmax over to Cambium) as well as Mikrotik routers (POE out) and Netonix switches. They work fine with 24V or both polarities but you’ll need 1A or more for long cable runs.

The connectorised antenna should make no difference. I’m wondering if you have an earthing loop that’s going from the antenna. I tend to carry a Mikrotik mAP2n (bridged WiFi makes pole/roof installs easy, voltage readout is useful with POE in/out) for fault finding. If the cable can power up the Mikrotik, it can usually power up the radio.

7

PoE Pin outs: +ve 4,5 -Ve 7,8

We tested the same model with Antenna in our lab, and it is working fine with 90 Meter cable. Not able to understand why it was not working at BTS site.

if you have an earthing loop that’s going from the Antenna. =====> Can you please elaborate this point in deep.

Further we have two more question regarding epmp 1000

1- What will be the PoE Voltage for epmp connectorized radio with GPS sync ??

2- What will be the Poe voltage for epmp connectorized radio without GPS sync ??

3- How to identify the difference in between two models physically ??

4- Will Antenna have any impact on PoE volatage ??

8

It has already been mentioned that some models can work on both versions of poe while others can. But I know for sure that all of them can work on the original Cambium POE 30 V.
(pin 4.5 - pole and pins 7.8 plus pole) If you don’t have Cambium POE pin 4.5 - pole pin 7.8 + pole, then on the side of the poe injector, replace brown-blue and brown/white-blue/white.
Warning force 300CSM is not allowed at 48V !!!
Series 300 designed for
30V passive PoE and works fine on the voltage range
(14–30 V DC input)

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