Mini PTZ camera impressions! 2015 PTZ camera of the year? AVOID THIS CAMERA
- Thread starter klasipca
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whoslooking
IPCT Contributor
Yes, as long as you get the POE model.
Yes you have to set home and present patrols if you want them.
Yes you have to set home and present patrols if you want them.
gpower07
Getting comfortable
Why not?
Well, standard POE (802.3af) provides only 15.4w max. Minus cable lost , left with approx 13w to the device. And if this cam consume 18w max. Shouldn't it be a problem?
I have 4x 3332 and looking to add another one, really like this mini ptz cam...
I believe hik nvr 71xx series and 76xx series has similar spec. Which model is your nvr? Have you test this cam with the nvr's Poe ?
whoslooking
IPCT Contributor
I don't power a ptz with a POE off the NVR or from a Switch, I will always use a midspan or dedicated local power.
It makes installation a bit more work, but save any strain on your NVR
It makes installation a bit more work, but save any strain on your NVR
gpower07
Getting comfortable
I need to take my words back...I connect the ptz cam to the poe switch.....and I don't want to kill my nvr.
klasipca
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Why would it kill nvr if you have enough power?
Del Boy
Getting comfortable
NVR will be up to 15.4W per port at source. Any more and it'll fry that port, and possibly the entire PoE switch and possibly the entire NVR PSU, and possibly the entire NVR...
klasipca
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That doesn't make sense. If Nvr supplies up to 15.4w then why would it supply more. And if cam requires more power then 15.4, wouldn't the camera just not function? I have 3 of these connected to my Nvr and is fine. I doubt 18w is correct but I will test it to make sure.
Del Boy
Getting comfortable
It makes complete sense. It would either kill the PSU or make the PSU voltage drop so much that it would be sufficient to power the NVR anymore. This is basic electronics.
The camera you have is max 18W, to use that it will have to have all of the IR Leds on max and be using the zoom and pan/tilt etc. So what is happening is you are using less than 15.4W and that is why it hasn't gone boom - yet. On top of that there is a maximum combined draw over all PoE ports. There's more chance the PSU blowing than the camera stopping to work. The camera will just try to draw what it needs. If it need 18W and the PSU absolute maximum is 15W, then it will try to draw 15W. If it shuts-down then great, if not, boom your PSU is dead. It might not blow immediately but as you are running it outside the specification, it will get hotter than it wants to run and will one day, just give up the ghost. I know this from first hand experiences of PC power supplies, which are very similar to the NVR ones.
I have a DS-2CD2032-I connected up at the moment and it says 5W in the dark, despite saying 7W max. I'm sure if it turned up the IR it would go to 7W.
klasipca
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Spec isn't everything, there is a lot of discrepancies. I did my own testing with a KillaWatt:
Power up: up to 6 watt
Idle 2 bottom leds: 5 watt
Idle 2 upper leds: 7 watt
Idle no leds: 1-2 watt
PTZ action with 2 bottom leds: spiked to 11 watt, but stayed between 9-10 watt
PTZ action with 2 upper leds: 11 watt
PTZ action no leds: 2 watt
Bottom line: No where near rated 18 watt and will be fine in NVR. FYI the 4 LEDs on the cam do not work all at the same.
As a comparison my 4MP Dome 2142FWD is
Idle: 2 watt
LEDs on: up to 4 watt
Power up: up to 6 watt
Idle 2 bottom leds: 5 watt
Idle 2 upper leds: 7 watt
Idle no leds: 1-2 watt
PTZ action with 2 bottom leds: spiked to 11 watt, but stayed between 9-10 watt
PTZ action with 2 upper leds: 11 watt
PTZ action no leds: 2 watt
Bottom line: No where near rated 18 watt and will be fine in NVR. FYI the 4 LEDs on the cam do not work all at the same.
As a comparison my 4MP Dome 2142FWD is
Idle: 2 watt
LEDs on: up to 4 watt