Frequently Asked Question:
1.What kind wire use for DMV series transceiver
We recommend use 4 pair Unshielded Twisted-Pair cable,category 3 or higher,16-24AWG,multi-pair
(6 pair or more)twisted pair is ok.If use STP(shield twisted pair) cable, the modular plugs need to use
shielded too,make sure STP shielded and modular plugs shielded connect together.
When need prolong UTP,you can use special RJ45 connect box or jointing to make connection,if in out
door use,please pressurizes use glass cement .
2.Why no interference in PoE PVD transceiver when transmitting power via UTP
PoE PVD transceiver powers working mode are based on IEEE802.3AF/AT. And this standard widely
used in IPphone, IPcam, and other Ethernet devices.No interference caused even transmitting power
under 1000Mbit Ethernet.PoE PVD transceiver use safe voltage (DC36V);the transmitter, receiver and
remote powered device are at same power ground, so no maladjustment to ground voltage position will
occures, and the signal quality will be better.
3.How can i do when remote camera power over PoE transmit power
Normal CCD camera power is 12V/0.15-0.08A, 56pcs LED IR camera power is 12V/0.5-0.4A.PoE PVD
transceiver can supply most camera.If special camera power over,please use Highpower PoE PVD tr-
ansceiver,if power over PoE in 50% range,can select 2pair-3pair module,this module converting 1pair
data wire into power wire,can increase 50% standard PoE transmit power.
4.Why PoE PVD transceiver use AC24-28V/DC30-38V input voltage,whether increase the costs
For the UTP is 24AWG wire,and loop DCR 19Ω/100m,so if want to transmit larger power to remote area,
it must increase the voltage to reduce the current, there by to reduce the power consumption.Otherwise
may lead to large power lost (Voltage lost=I*R) or current limit exceeded.Single 36V adapter more costs
than 12V adapter, but PoE PVD transceiver is centralized power supply, one 36V 3A adapter can supply
6 pairs of PoE PVD transceiver, one transceiver need 0.5A power only.Averagely,each pair transceiver
adapter only cost not higher than 12V adapter.
