As we all know most of the RB4xx boards will run on anything between 11V and 28V.

Is there any benefit to using a 24V power supply?
Is there any disadvantage to using a 12V power supply?

Thanks guys.

Is there any benefit to using a 24V power supply?

You can run an RB433 with 3 radios with poe.

Is there any disadvantage to using a 12V power supply?

You can't.

The 12V may power the board with just one radio, but you'll probably run into problems if you want to that with poe.

Bottom line is more voltage=more options for the board.

the main difference is distance. Higher voltages run further distances with less loss. If your power from a local supply, use any of them.

Let's work on the assumption that I'm not using PoE and that power is supplied via the socket on the board.

I suppose I should have stated that in the beginning. Sorry.

I've had an RB433 + 2radios run great on 12v, for months.

I recommend 18v though, particularly if you're going to use up all the slots and/or use high power radios - XR2 etc.

I have not evaluated the power supply on any of the RB products, so I don't know what type voltage regulator they use. If they use PWM, then it will not matter too much. If they use linear types, then it does matter. The higher the input voltage, the more heat the linear regulator will produce to control the voltage. Heat is the killer. I use 12v power supplies rated at the appropriate current (more radios, more current required) and have no challenges with power. And, like you, I do not use PoE.

Hello,

I mainly use 24V, and difference power of radio cards and voltage loss on bigger PoE (ethernet cable) length... On about 25 meters I loose about 1,5V...

So... the question now is... why is MTK going away from 48v? We had it on older boards, but now boards such as the 433 are shipping at 24.

We now deploy 600's at distances over 75m as they are more stable than a 433 on 24. (or I might add, they work where a 433 won't)

The 12V may power the board with just one radio, but you'll probably run into problems if you want to that with poe.

You will not run into problems as long you supply enough A. Any mt board including rb600a will run perfect with 12V as long as you have enough Watts = VOLTS x Amps, so don't worry.

Just to post our experiences....

previously our RB532 bts's was powered with 18V-7A battery with 3A charger power supply and it only last max 2 hours.
about a month ago, we change the power supply with 12V-14A battery with 3A charger and seems it can last untill 4 hours.

The above RB532 are filled in with 2 unit of R52H

Another....
We got some RB433 as hotspot gateway and it powered by 12V-7A battery with 3A charger. The same power supply also serve linksys with distance about 50 meter away via poe.
Within the first week, we has not enough power experience everyday. The main power supply (UPS) always on but the battery become 9VDC after 24 hours. Seems that the charger not big enough.
On the second week, we put scripts on RB433 to switch the wlan1 off at 23oo everyday and switch it back on at 10oo on nextday. Since than, we has not having not enough power anymore.

Cheers

Paul

Just to post our experiences....

previously our RB532 bts's was powered with 18V-7A battery with 3A charger power supply and it only last max 2 hours.
about a month ago, we change the power supply with 12V-14A battery with 3A charger and seems it can last untill 4 hours.

The above RB532 are filled in with 2 unit of R52H

Another....
We got some RB433 as hotspot gateway and it powered by 12V-7A battery with 3A charger. The same power supply also serve linksys with distance about 50 meter away via poe.
Within the first week, we has not enough power experience everyday. The main power supply (UPS) always on but the battery become 9VDC after 24 hours. Seems that the charger not big enough.
On the second week, we put scripts on RB433 to switch the wlan1 off at 23oo everyday and switch it back on at 10oo on nextday. Since than, we has not having not enough power anymore.

Cheers

Paul

Monitoring of power from the UPS.
Battery 2,3 A / h, RB411

UPS on the elements of Mean Well http://tandem.ck.ua/ups_mt-eng.php

I have the RB800 which specs say it requires 48V. Two questions about it:

If I use the PoE from a Cisco port, will that work well? I thought about removing all VLAN's so it was just PoE and use the Gig port for the data path, hopefully it won't cause a net loop.

Will the RB800's run well on a 24V supply? I will only have one antenna off of it.

Lower voltage = higher amphere usage
Higher voltage = lower amphere usage

If you have a 12VDC, 1A power supply, you will be able to power less devices (boards, radios, etc) than say with an 48V, 1A power supply. Higher voltages also means less impact to a voltage drop (regardless of whether it is poe or not). There will be an voltage drop over any cable, and thicker cables will also mean a smaller drop in voltage.

EDIT: Comes back to the amount of Watts available, as was mentioned by someone else a bit further up. 12 x 1 = 12W available on a 12V, 1A supply. 24 x 1 = 24W available on a 24V, 1A supply.

48V is a standard for Telco-Equipment. Therefore I would prefer all stuff
doing 48V so I could use a single power source at a site.

48V is a standard for Telco-Equipment. Therefore I would prefer all stuff
doing 48V so I could use a single power source at a site.

+1 - would definately appreciate standarisation on power requirements.

48V is a standard for Telco-Equipment. Therefore I would prefer all stuff
doing 48V so I could use a single power source at a site.

+1

If you run out of options, you can use this converter : http://routerboard.com/RBPOE-CON-HP