HELP with Dahua network PTZ camera DH-SD1A404XB-GNR
- Thread starter Stargajzer
- Start date
Looks like the same issue with the 2 posts you made in another thread on Monday. Anyway, here goes:
According to the specs, the camera is powered by either 12VDC on its coaxial power connect OR over the CAT-5e cable by 802.3af-compliant POE. That POE power should come from a 802.3af/at compliant POE switch or POE injector rated sufficiently (in Watts) to power the camera.
It sounds like you tried a passive 24VDC injector from a Ubiquiti or TP-LINK wireless access point which the camera is NOT rated for so hopefully you did not damage your camera. It's always best to consult the manufacturer's specs or manual BEFORE powering up a device.
According to the specs, the camera is powered by either 12VDC on its coaxial power connect OR over the CAT-5e cable by 802.3af-compliant POE. That POE power should come from a 802.3af/at compliant POE switch or POE injector rated sufficiently (in Watts) to power the camera.
It sounds like you tried a passive 24VDC injector from a Ubiquiti or TP-LINK wireless access point which the camera is NOT rated for so hopefully you did not damage your camera. It's always best to consult the manufacturer's specs or manual BEFORE powering up a device.
Tony, thanks for the quick response and link to the specs. Which POE make and model do you suggest using? I contacted dahua but they refused to assist simply because it wasn't an american market model and the weather here is beginning to cool and wanted them working as they should before gets too coldLooks like the same issue with the 2 posts you made in another thread on Monday. Anyway, here goes:
According to the specs, the camera is powered by either 12VDC on its coaxial power connect OR over the CAT-5e cable by 802.3af-compliant POE. That POE power should come from a 802.3af/at compliant POE switch or POE injector rated sufficiently (in Watts) to power the camera.
It sounds like you tried a passive 24VDC injector from a Ubiquiti or TP-LINK wireless access point which the camera is NOT rated for so hopefully you did not damage your camera. It's always best to consult the manufacturer's specs or manual BEFORE powering up a device.
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Goalake POE-1050 works okay for me. 4 ports plus one for LAN. These are no-fan cooled, dead silent.
Maybe a whopping ~$18 on AMZ. Unmanaged switch. Note that if these el-cheapo's are loaded to full capacity [all 4 ports POE] the life span is VERY short unless you force-fan-cool them.
At this price, buy two -keep one new on the shelf as a spare and just never plug more than two POE powered devices into each box (which will keep the power supply under-loaded) to extend the life of the switch.
k
Maybe a whopping ~$18 on AMZ. Unmanaged switch. Note that if these el-cheapo's are loaded to full capacity [all 4 ports POE] the life span is VERY short unless you force-fan-cool them.
At this price, buy two -keep one new on the shelf as a spare and just never plug more than two POE powered devices into each box (which will keep the power supply under-loaded) to extend the life of the switch.
k
If an unmanaged switch is used, does anyone know if the POE switche's mac address could be programmed to use an alternative subnet mask within the main network router GUI ? I'd prefer that the cameras did not share my network traffic as it's known that both lorex and dahua cameras were discovered to be remotely controlled and their settings changed without owner permissionsLooks like the same issue with the 2 posts you made in another thread on Monday. Anyway, here goes:
According to the specs, the camera is powered by either 12VDC on its coaxial power connect OR over the CAT-5e cable by 802.3af-compliant POE. That POE power should come from a 802.3af/at compliant POE switch or POE injector rated sufficiently (in Watts) to power the camera.
It sounds like you tried a passive 24VDC injector from a Ubiquiti or TP-LINK wireless access point which the camera is NOT rated for so hopefully you did not damage your camera. It's always best to consult the manufacturer's specs or manual BEFORE powering up a device.
Tony, I see the wattage ratings which is easy to calculate the maximum current draw but my dahua cameras need 12v each and draw 8.5w max with IR light usage. These POE switches, what's not clear to me is the voltage, all of these switches indicate various voltage outputs, are the ethernet ports auto sensing and send the necessary voltage or is the rating divided by the number of POE ports? Thanks
A Dahua camera for POE requires 48 VDC for proper operation using a RJ45 connector and CAT 5 or 6 eight conductor cable. The camera can also be operated on 12 VDC which is NOT considered POE. But not both together. Select one or the other.
Most of the newer POE switches (48 VDC) use auto sensing which negotiates if the 48 VDC is turned on or not. Thus it is possible to plug into a POE port with another non POE switch/device and not damage either device. In this case the 48 VDC is not available on that port.
Overall POE switch rating is one number that applies to total maximum power that can be supplied by the switch. A 60 watt rated switch can supply a maximum of 15 watts to each of its 4 ports. Also some ports are current limited to a max of 15 watts each depending on manufacture while other may not be current limited.
In other cases, a POE+ port can supply 30 watts to one port but will then only leave 30 watts remaining for the other ports. Thus one 30 watt port and 3 ten watt ports for a total of 60 watts for a 4 port switch. Some switches have 4 POE ports and either one or two uplink ports for expanded versatility with the uplink ports being non POE.
Most of the newer POE switches (48 VDC) use auto sensing which negotiates if the 48 VDC is turned on or not. Thus it is possible to plug into a POE port with another non POE switch/device and not damage either device. In this case the 48 VDC is not available on that port.
Overall POE switch rating is one number that applies to total maximum power that can be supplied by the switch. A 60 watt rated switch can supply a maximum of 15 watts to each of its 4 ports. Also some ports are current limited to a max of 15 watts each depending on manufacture while other may not be current limited.
In other cases, a POE+ port can supply 30 watts to one port but will then only leave 30 watts remaining for the other ports. Thus one 30 watt port and 3 ten watt ports for a total of 60 watts for a 4 port switch. Some switches have 4 POE ports and either one or two uplink ports for expanded versatility with the uplink ports being non POE.
AC, thank you for your quick reply and detailed feedback. Considering what you wrote I believe I understand, if these cameras are powered using the round power socket, it must be 12v, if using the RJ45 then power must come from the 802.3af POE which this POE standard outputs 48V. I'm feeling that I'd like to use the Ubiquiti networks switches, I've found this brand to be rock solid, they always work and never require rebooting. Please feel free to add anything else that should be known as this is my first CCTV start to finish install. Thank you!
Correct on the round for 12 VDC and RJ45 to POE (48 VDC) power for the typical Dahua POE camera. The issue with using 12 VDC is that a larger gauge wire will be needed as the current is higher than when using 48 VDC POE. Plus one has to still run a POE CAT 5/6 line for data.
Have no experience with the Ubiquiti switches. Many use NetGear with good results. Others TP Link. You will find a variety of opinions on this site as to what works best.
Keep in mind that it is overkill to use 10/100/1000 on all ports. It takes about 10 Dahua cameras to reach 100 megs of used bandwidth. Thus a switch with all 10/100 ports is adequate for a small installation. i.e. say under 8 POE cameras to provide a little head room just in case.
However, for large installations one can still use 10/100 ports for the cameras but the switch should then have one or two 1 Gig uplink ports. In my case, with a 24 port POE switch the total bandwidth needed for 28 cameras is in the range of 315 Mbps for night and higher for daytime with more activity. A switch with twenty-four 10/100 POE ports and one or two 10/100/1000 uplinks ports is more than adequate IMO.
Plus one can use a smaller POE switch at a distant location to cut down on the number of CAT 5/6 runs. Then connect one of those ports (if uplink ports are not available) to any one of the unused POE ports in place of running more camera cable runs. Just make sure that the total uplink bandwidth is under 100 megs as to not saturate a 10/100 port on the main switch.
Have no experience with the Ubiquiti switches. Many use NetGear with good results. Others TP Link. You will find a variety of opinions on this site as to what works best.
Keep in mind that it is overkill to use 10/100/1000 on all ports. It takes about 10 Dahua cameras to reach 100 megs of used bandwidth. Thus a switch with all 10/100 ports is adequate for a small installation. i.e. say under 8 POE cameras to provide a little head room just in case.
However, for large installations one can still use 10/100 ports for the cameras but the switch should then have one or two 1 Gig uplink ports. In my case, with a 24 port POE switch the total bandwidth needed for 28 cameras is in the range of 315 Mbps for night and higher for daytime with more activity. A switch with twenty-four 10/100 POE ports and one or two 10/100/1000 uplinks ports is more than adequate IMO.
Plus one can use a smaller POE switch at a distant location to cut down on the number of CAT 5/6 runs. Then connect one of those ports (if uplink ports are not available) to any one of the unused POE ports in place of running more camera cable runs. Just make sure that the total uplink bandwidth is under 100 megs as to not saturate a 10/100 port on the main switch.
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Keep in mind many ubiquity products are proprietary and do not follow POE standard, so it is important to read the specs carefully and maybe even do a search here on the model to see if anyone is using it.
Not all of them are, but standard POE is 48v and many ubiquity POE switches provide 24v passive.
Many posts here over the years of someone saying their new cameras were DOA and we do all this troubleshooting and come to find out it was ubiquity POE switch they were using. So one of the questions we now ask is make and model of how they are trying to power their camera.
Thanks for your feedback, I believe you may be unaware of what I also was. Because I don't do this every day and had a teeny bit of experience a decade ago while installing two WIFI radios which used POEs, what confused me was that the installation manual for my dahua camera said 12V for power but didn't clarify that 12V is only used for the round power socket or using POE 802.3af 48V through the ethernet, that should have been added to the installation manual but I get it, that's how the Chinese roll, less is more. For anyone reading this post in the future, according to AI, newer POE standards are backwards compatible meaning the newer (or higher) letters after the 802 standard below can be used for older POE IEEE standards considering the minimum output power supply is sufficient to power older hardware. Thanks for your help guys!
IEEE 802.3af (Type 1, commonly known as PoE)
Introduced in 2003, this standard provides up to 15.4 W of power at the Power Sourcing Equipment (PSE) and delivers a minimum of 12.95 W to the Powered Device (PD) at the far end of the cable. It operates within a voltage range of 44.0–57.0 V at the PSE and 37.0–57.0 V at the PD, using two pairs of wires (2-pair mode) and supports Category 3 or better cabling
IEEE 802.3at (Type 2, commonly known as PoE+)
Released in 2009, this standard increases the power delivery to a maximum of 30 W at the PSE and provides a minimum of 25.50 W to the PD. It uses a voltage range of 50.0–57.0 V at the PSE and 42.5–57.0 V at the PD, also using two pairs of wires (2-pair mode), and requires at least Category 5 cabling .
IEEE 802.3bt Type 3 (commonly known as PoE++, 4PPoE, or Ultra PoE/UPoE): Standardized in 2018, this type uses all four pairs of wires (4-pair mode) to deliver up to 60 W of power at the PSE and provides a minimum of 51 W to the PD. The voltage range is 50.0–57.0 V at the PSE and 42.5–57.0 V at the PD, requiring at least Category 5 cabling [1][6][7].
IEEE 802.3bt Type 4 (commonly known as Ultra PoE/UPoE)
Also standardized in 2018, this is the highest power PoE standard, capable of delivering up to 90 W at the PSE and providing a minimum of 71.3 W to the PD. It operates within a voltage range of 52.0–57.0 V at the PSE and 41.1–57.0 V at the PD, and mandates the use of 4-pair mode with at least Category 5 cabling