cztexas

Well, already return it. Mine is like 28.9/34.5 (due to my input voltage is 123vac). I will keep it if it could below 28, with 100ft cat5e, it could drop more. I guess this is for 7.5A max, so the output voltage is much higher for open load. I bought ALTV248, which is 4A max. Hope this one will function well. The cameras are much expensive than PSU. I prefer to pay more attention with it.

OK, got it. I will try another one. Thank you for your quick help.

Thank you. I need 24vac power supply since my ptz only took 24ac. I bought my dvr and 2 cnbs there. But they do not have AC power supply box.

Well, it looks like the original transformer~~~ Any reputable dealer do you recommend, online? ~~~

I trusted your memory and I did try the CNBs. It works, but the voltage is still around 28vac with 100 ft cat5. Everyting looks normal except some resisitors on PCB inside the camera are really hot. I know this box is not bad model line since Altronix has been proved good quality here. So do you suggest me to try anothe one or should I keep this one (I got this one from ebay, the seller accepted returns)? Thank you.

Could any owner of Altrox altv244, Altrox altv248 or Altrox altv248175 measure their actual voltage right out of box? I want to know whether the 29/34 is normal or not. Thank you so much~~~~

I totaly agreed with what you have mentioned. I am a Electrical Engineering in Power System. But the problem is, the 29 VAC is the true-RMS, measure by Fluke Multimeter, not the cheap one:) The primary voltage is 123VAC. And also, as measuring the output of transfomer, I measured in both situation: no load and with load. The best scenario I got is using 100 ft CAT5e, connected to my 13w camera, the end terminal voltage will drop to 26.7, which is fine. But if I change to CNB VCM-24VF, which only requrie 3w (=very low current), the voltage drop will be less than that. I did not try it.

I just bought Altrox altv248175ul3 and thinking it is good choice (made in usa). But the output voltage is 29/34 vac instead of 24/28 vac. I knew it should be a little bit higher than its rated value due to power loss. But 29 vs 24 seems too high for me. I just do not to fry my camera. I did try them on my cameras. It works. But my concern is will it shorten the camera's life? Does all Altrox PSB has similar setting or I just got a "bad" Altrox? Thinking to return it, but kind of worry to try another Altrox. Need your suggestions on 24vac power supply box. Thank you!