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paoloneba
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Power Supply

Sun Feb 28, 2016 5:04 pm

Hi

I've an installation on a pole with: sxt5ac, basebox2, rb951 and a speed dome camera with poe+ ord 24vac 60w.
I want to install a watherproof box on the pole.
What you suggest to power this units safely and securely?
Do you use a battery backup to protect the units?

my best regards
 
n21roadie
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Re: Power Supply

Sun Feb 28, 2016 5:22 pm

The camera with that power requirement will need a 2.5Amp 24Vdc PSU?

I would use two separate 24V supplies (1) for sxt5ac, basebox2, rb951 and (1) for dome camera

Meanwell AD-155B 24V 155W DC UPS Switching Power Supply attach 2 x 12v batteries and you have power supply
failover,
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paoloneba
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Re: Power Supply

Sun Feb 28, 2016 6:02 pm

thanks the camera wants 24vAC not dc
battery: how can you manage charge and discharge?
 
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ShayanFiroozi
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Re: Power Supply

Sun Feb 28, 2016 6:23 pm

Hi, it's better to use small UPS

otherwise you have to design it yourself !

there are many automatic battery charger circuit , but you should know about your battery voltage , a 12 volts SLA battery will be died forever under deep discharge , 11.9 or 12.0 volts is the minimum threshold , 13.4 or 13.6 is the maximum,

LVD(low voltage disconnect circuit should be use to cut off your devices from battery in case of under 11.9 or 12 volts

this site could help you : http://www.homemade-circuits.com/

but in my opinion use a small ups , it's much better and of course it's more safe
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n21roadie
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Re: Power Supply

Sun Feb 28, 2016 9:12 pm

thanks the camera wants 24vAC not dc
battery: how can you manage charge and discharge?
I have been using for years the Meanwell SMPS I listed with deep cycle batteries, the batteries are on a continuous float charge of 27.4V from the SMPS,

When there is a AC outage the SMPS automatically switches to the batteries but unfortunately when the batteries drop below 21v (or so) the SMPS Low voltage circuit disconnects the batteries, which is very annoying when using deep cycle batteries?
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jarda
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Sun Feb 28, 2016 10:08 pm

I use digital mppt solar regulator powered by appropriate power supply. All the battery voltage characteristics are freely configurable with the 0,1V step.
 
p3rad0x
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Re: Power Supply

Thu Mar 03, 2016 12:23 pm

Hi,

Maybe look at this?

http://routerboard.com/RB750P-PBr2

It's a 750up in a waterproof box. works good for those mini sites.
There you go then you touched something ;-) : it only takes a change in wind direction to screw with your nat :-)
 
p3rad0x
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Re: Power Supply

Thu Mar 03, 2016 12:57 pm

Oh dang, I read the post like my butt.

Powerbox isn't a powersupply
There you go then you touched something ;-) : it only takes a change in wind direction to screw with your nat :-)

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