POE for PTZ cameras

L

Lex

n3wb
Nov 18, 2016
13
4
I have recently gotten a couple of big PTZ cameras and was wondering if there was a better way to power them.

I have the SD6CE445XA-HNR
Power
Power SupplyDC 24 V/2.5 A ± 25%; PoE+(802.3at)
Power Consumption13 W, 26 W (IR On, Heater On)

and the SD49225T-HN

Electrical
Power SupplyDC 12V/3A, PoE+(802.3at)
Power Consumption13W, 22W (IR on,Heater on)

both are poe+, so I was thinking about 2 of these-

BV-Tech Gigabit Power Over Ethernet PoE+ Injector | 30W | 802.3 af | Plug & Play | up to 325 Feet

Not sure why the title only has 802.3af, but they are 30 watt and the description lists 802.3at as well-

1675814920271.png

Would that work, or does anyone know of a not too pricey switch that would power both or better injectors for the money?
I thought about a 60 watt one and one cable to a poe splitter , but the cost to do that seems higher than just running 2 separate one.


Thanks
 
You either get two POE+ injectors or a POE+ switch.

Do not do a cable to POE splitter. That is ok for regular cams, but a PTZ you will be asking for trouble.
 
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Thanks!

So something like this should power both?

1675816137556.png

Or this. (I don't want anyone to think I am trying to push that BV-Tech brand. I know nothing about their quality.

1675816312178.png
 
I would go with the 2nd one that provides 65 watts. You don't want to run too close to the rated capacity of the switch. I also wouldn't try to power anymore cameras with it. You might get by with one, but the PTZs will let you know because they will reboot if starved for power.
 
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Thanks! I will try that one then. I think I should be able to just link this one in with my POE switch that is powering the rest of the cameras and only use this for the two PTZ's.
 
Thanks. How about this? A little better? Can't really affor a CIsco at the prices i am seeing. What brand would you recommend?

1675829360068.png
 
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OK thanks. i will try the TPlink. Just hope it doesn't take the cameras with it when it decides to go. THanks for the responses!
 
Lex said:
OK thanks. i will try the TPlink. Just hope it doesn't take the cameras with it when it decides to go. THanks for the responses!
Click to expand...
Why do you think it would take the camera out? Personally I've never seen a TP-Link switch die. I've installed a bunch of them. You are welcome to go with a better brand my point simply was avoid the real cheap stuff like BV tech.
 
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I was just joking. I have 3 TPLink switches and 1 wi-fi router. None have given out yet. Only one is POE (TL-SF1008P). It has been running since since Sept 2018.
 
wittaj said:
You either get two POE+ injectors or a POE+ switch.

Do not do a cable to POE splitter. That is ok for regular cams, but a PTZ you will be asking for trouble.
Click to expand...

How about the SD5A425GA-HNR ? Will this ptz work properly if powered by something like this? Or is it preferable to power it the way you described?
 
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Additionally, is the idea to run poe+ power via the sole cat6 connection to the ptz? Or, is it to also add power (in addition to poe+ via cat6) via the ptz power leads (black & red wires)?
 
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ernest1974 said:
Thank you. Would you please clarify? Which power source is preferable?
Click to expand...
That splitter provides only 25W of power; at 24VDC that camera requires 2.5 amps (60W).
802.3at (POE+) would be preferred.
ernest1974 said:
Additionally, is the idea to run poe+ power via the sole cat6 connection to the ptz?
Click to expand...
Yes.
From a POE+ (802.3at-rated) switch or injector.
Then you do NOT connect anything to the red and black wires.
 
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TonyR said:
That splitter provides only 25W of current; at 24VDC that camera requires 2.5 amps (60W).
802.3at (POE+) would be preferred.

Yes.
From a POE+ (802.3at-rated) switch or injector.
Then you do NOT connect anything to the red and black wires.
Click to expand...
Thank you.

Not sure I understand.

A. Is not the 802.3at spec for only 30 watts?

B. Dahua lists powersupply spec at 2.5 amps (60 watts) but only 21 watts consumption by the ptz. What spec do we use for purposes of determining PoE?

From Dahua spec sheet SD5A425GA-HNR
Screenshot_20230223_162555_Samsung Notes.jpg
 
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ernest1974 said:
Thank you.

Not sure I understand.

A. Is not the 802.3at spec for only 30 watts?

B. Dahua lists powersupply spec at 2.5 amps (60 watts) but only 21 watts consumption by the ptz. What spec do we use for purposes of determining PoE?

From Dahua spec sheet SD5A425GA-HNR
View attachment 155136
Click to expand...
A. The 802.3at spec will provide more power than the "af "so it can be used when an af will do; the reverse is NOT true....bigger is better when in doubt.
B. The direct voltage (24VDC) is about half of what is supplied by POE so the power supplied by POE is also about half....use the POE spec if you intend to power by POE....and the spec says "POE +", which is 802.3at

More info ==>> Standard Implementation, Power over Ethernet - Wikipedia
 
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POE Voltage and Wattage are not the same as using the power pigtail,
which is typically 12vdc at 1.0-2.0 amps on my 4MP Empiretech PTZ.
Mine wont power on with my 802.3 af. switch
So in bench testing i used a 12vdc 2.0 amp wall wart.
 
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What Does that Mean for PoE? Per IEEE standards, PoE is injected into a cable at voltage between 44 and 57V DC, typically 48V DC.
 
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