Camera Power
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 AC 100 24050 60Hz 18A To DC 12V 5A Power Supply Adapter for Security Cameras $14.99 Time Remaining: 1d 2h 17m |
 100pcs 55 x 21mm 21 Male DC Power Connector Adapter Jack Plug for CCTV Camera $39.90 Time Remaining: 12h 45m Buy It Now for only: $39.90 |
 4 X 65ft CCTV BNC Video 12v Power Security camera cable $19.99 Time Remaining: 1d 2h 18m Buy It Now for only: $35.00 |
 Power Supply Box CCTV CCD Camera 18 Port 12V DC+Pigtail $54.86 Time Remaining: 18d 21m Buy It Now for only: $54.86 |
 50ft Video Power Cable DVR CCTV Surveillance Security Camera Extension Wire b3r $7.95 Time Remaining: 26d 8h 24m Buy It Now for only: $7.95 |
 DC Power Splitter Cable for CCTV Camera Adapter 1 Female to 4 Male NEW $5.85 Time Remaining: 1d 2h 44m Buy It Now for only: $6.75 |
 8 Channel CH CCTV Security Camera Power Supply Box 12 V DC $59.95 Time Remaining: 24d 12h 23m Buy It Now for only: $59.95 |
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 CCTV Security Camera Video Power Cable 50ft BNC New b66 $7.99 Time Remaining: 3d 8h 26m Buy It Now for only: $7.99 |
Camera Power
I Have The Power – CCTV Power Needs
When building your surveillance system you will need to select a cctv power supply. This can be a little more involved then simply plugging an adapter into the wall. Lets address a few of the features and differences amongst cctv power supplies.
Single Port Vs. Multiple Port
The name says it all. Are you going to use a single port power adapter at each security camera; or are you going to have a single power box to supply power to all of your cameras? If your surveillance system only has a couple of security cameras; then it may be a good idea to just use a single power adapter at each camera. In fact even four camera adapters all running to a power strip may not be a big deal.
Neatness and a clean installation can be quite an attractive option however, and it may be a more ideal situation to have a single power box supplying power to your entire system; especially if you have a large number of cameras. The choice for this is really dependent on the user and their power requirements and aesthetic preferences.
DC vs AC Power Supplies
Security camera power supplies for the majority of time have been 24VAC. Throughout the past 10 years the advent of smaller more compact and covert cameras has led to an increased number of 12VDC options. Both of these are lightly regulated (low voltage) for construction which allows flexibility in surveillance installations.
12VDC
12VDC uses a smaller footprint for security cameras because it does not need a rectifier. Although this type of power supply was originally designed for covert surveillance applications, it has become quite popular for larger C/CS mount type security cameras. On the downside 12VDC is not a good solution for long cable runs and in fact the 12VDC power boxes can cost more than their 24VAC counterparts.
24VAC
These power supplies are often simple transformers distributed through multiple ports or used in a single application. The advantage to these power supplies is found in the cost of multiple port units, as they have a reduced amount of components needed. Another advantage is their ability to keep a solid power signal over longer cctv cable runs.
Mixed Surveillance Systems
Through the use of power converters many surveillance systems will use a mixed assortment of power supplies both 12VDC and 24VAC. These converters allow 24VAC voltage to be regulated down to 12VDC. If a converter is going to be used in a system you want to make sure to allow for overhead on the current rating. For example if you use a 12VDC 400ma power supply; then you are going to want to use a 800ma AC to DC converter. This will help avoid potential conversion failures.
Should You Fuse
Most multi camera surveillance systems use a multiport power supply with either a glass fused or PTC (circuit breaker) overload protection.
For most applications fuses are preferred, but in many situations the use of the PTC type allows for an automatic reset of the fuses once the power is removed and then restored. The downside to this system is that the PTC system can take too long to react and it may not offer the proper power protection that you would get from a properly rated fuse. In fact there are occasions where a PTC will fail completely; leaving you with a dead port.
Generally fuses are recommended, but if a PTC system is designed; it is a good idea to have extra ports on hand.
About the Author
Christian M Gillman has worked in the surveillance industry for over 6 years. Subscribe to our monthly newsletter, learn more about surveillance, and find great products at http://www.cu1.com
- CU1 - Your CCTV Products and Surveillance Equipment Source
Does the DC port on my digital camera charge my battery or just allow it to run without using battery power?
I have a Panasonic Lumix DMC-TZ3 digital camera, and I'm getting ready to do some traveling in rather remote areas. I want to be able to charge my batteries (Li-Ion) with a solar charger or another device without having to find a wall outlet to plug into.
I figure the only way this would be possible is by using an adapter connected to a solar charger that can plug into the DC port on my digital camera. But does this port actually charge the batteries or just run the camera off of that power?
Or, is there another way for me to charge my Li-Ion batteries with Solar Power or something similar?
Has anyone else dealt with a similar issue before?
Thanks for you help!
Yes, if your camera was sold with a rechargeable battery, the power adapter charges it.
(Note: in many cameras, you can use rechargeable AA batteries. In that case, a power adaptor does not charge those batteries).
Easy way to check. Use your camera until the battery runs out.
Then put the adaptor. If later you can use the camera with no adaptor, it means it was charged.
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