I have news again. The dealer found out together with Dahua support that there is a moment when camera models current draw rises high and causes reboot especially when connected in TAM1GT1GT-30 injector. Dahua support recommended to use
either Hi-Poe 75W injector or 24VAC power supply. It seems that Poe+ info in datasheet is wrong.
Last week I got also Vigitron PoE voltage/power meter and I have used it to see what happens in reboot. According to this meter, cameras power consumption is not so high. During daytime, it can be 7-8W on idle and IR on around 10W. When tracking, 11-14W. This all with PFS3005-4ET-60 switch in 30W port which offers 53V. TAM1GT1GT-30 voltage is 51V. Both measured near the switch.
I had bullet camera recording the meter while PTZ was doing reboots. I could not see any big power peak, although there was always quick voltage dip just when the recording was stopping and camera rebooted. 53->52->53 in a half second. Highest watts were
15-17W just before reboot, no more. I also repeated the test when weather permitted and put the meter outside directly in cameras connector. Did not see significant difference in levels.
I also found a good way to test if the camera reboots or not. I have a preset with zoom full wide and one vertical tripwire just about center of the picture. I walk slowly back and forth in a form of an arc about 4-5m from the camera. Camera starts tracking me, and I continue walking. I walk until camera stops tracking and returns to preset. I repeat this, and if plugged in TAM1GT1GT-30 with a 5m cable, camera reboots almost sure. I could get camera reboot three times in a row. With 5m cable and PFS3005-4ET-60 switch, camera plugged in 30W port, I didn't had patience to repeat walking so many times I could get it reboot. Still, during normal operation it could reboot occasionally, maybe once a day or less.
I still was wondering why my client has reboots even he has Hi-Poe switch and good cable.
I made a stupid setup which should of course not be made permanently, but just for a test. I put PFS3005-4ET-60 switch with Vigitron meter in the other end, then 40m+20m U/UTP cable and last 5m F/UTP cable. Three female/female connectors in between.
Plugged the camera in 30W port and after 3 hours, I could see 3 reboots. I was surprised when I was playbacking the camera pointing Vigitron meter. In one of 3 reboots, I could see watts peaking 44 just before reboot! On the video I could count it lasted around 10 frames (half a second in this case). I don't know what is the sample frequency of that Vigitron meter, but it could be slower than the peak and that's the reason it is not seen in all reboots (and I haven't playbacked all of them).
Later I plugged the camera in Hi-Poe port and repeated my walking test. Quess what? Yes, reboot again. Of course the cable test setup is not good here now, but seems to be we have to pay very much attention to cable quality, length and AWG. Even though, my client still has AWG23 factory-made cables which are not too long.
I will leave it in Hi-Poe port now and see if there is reboots in normal operation with this crazy cable setup.
Did you get this solved with 75W injector?
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