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CCTV SYSTEMS

CCTV SYSTEMS

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CCTV SYSTEMS

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  1. CCTV SYSTEMS CAMERA POWER SUPPLIES

  2. CCTV SYSTEMS • As mentioned before cameras operate on only two voltages. 12 volts DC 24 volts AC • DVR’s do not provide power for the cameras.

  3. CCTV SYSTEMS • You can order separate power transformers for each camera or you can use a power supply system. • PoE (Power over Ethernet) is available for powering cameras over UTP however it’s limitations are wattage requirements and distance. • Battery packs are also an option for some camera locations.

  4. CCTV SYSTEMS • 12 Volt DC 500 Milliamp Regulated • Regulated 12v 1 Amp Power Supply

  5. CCTV SYSTEMS • 12 Volt 8 Amp 16 camera power supply with each connection fused for added equipment protection. • Each camera is connected to a terminal via screw terminals with LED indicators.

  6. CCTV SYSTEMS • 24 volt AC, 8.4 amp 16 Camera Power Supply designed to power 16 cameras from one central location. • Each of the 16 outputs are fuse protected. • Output fuses are rated @ 500mA, 115VAC 60Hz, the input fuses are rated @ 3.5 ampand each output is separately fused with LED indicators for each fuse.

  7. CCTV SYSTEMS • When connecting a camera’s power leads it should be placed in corresponding order of each camera. THE CHANNEL 1 CAMERA SHOULD BE CONNECTED TO POSITION 1 IN THE POWER SUPPLY FOR EASE OF TROUBLESHOOTING.

  8. CCTV SYSTEMS • Here is a close up of a 4 channel power supply showing the fuses and screw terminals, also visible are the knock outs for routing cables in. KNOCK OUTS

  9. CCTV SYSTEMS • Power supplies with battery backup are also available for CCTV systems.

  10. CCTV SYSTEMS • In many cases when you need the CCTV system up and running the most is when the power goes out, that is when the looters come out. • A continuous duty UPS (uninterruptible power supply) charges its battery constantly and uses the battery to provide electrical current.

  11. CCTV SYSTEMS • This allows the UPS to compensate for spikes, surges and brownouts and provides clean power. • The equipment continues to operate at the proper voltages and is protected from voltage spikes and surges.

  12. CCTV SYSTEMS • When using a UPS it is plugged into an outlet and the power supply will plug into the UPS, all other equipment also gets plugged into the UPS. • If you have a 24VAC system with 16 cameras and the 16 power terminals are connected in parallel rated at 100 ohms at ½ an amp how many volts will each terminal provide? 24VAC………TRICK QUESTION

  13. CCTV SYSTEMS • This is a 4 port PoE switch that can be used with a 4 channel CCTV system using UTP cabling. PORT 1 ON THIS SWITCH WOULD CONNECT TO THE LAN PORT OF AN NVR OR DVR

  14. CCTV SYSTEMS • Here is a 16 port managed PoE switch that is perfect for a 16 channel CCTV system.

  15. CCTV SYSTEMS • CCTV power supplies are grounded through a technical ground which means they use the third prong of the power cord as ground. • The 16 channel power supply boxes usually come with an extra fuse usually rated at 250 volts and 500mA.

  16. CCTV SYSTEMS • Its always a good idea to have extra fuses handy, especially after initially turning the system on. • When servicing cameras the system should be powered down, if it can’t be powered down then the power to the camera in question should be disconnected.

  17. CCTV SYSTEMS • If running siamese type coax cable you will need the power supply adapter if there are no screw terminals on the back of the camera. • These power adapters can be spliced on with dolphins crimps. POWER ADAPTER WITH SCREW TERMINALS

  18. CCTV SYSTEMS • In most instances you will use the electrical spade plugs on the 18/2 power leads when connecting them to a camera. 18/2: 18 AWG, 2 CONDUCTOR

  19. CCTV SYSTEMS • If a separate 24VAC power source is required you can use a 24VAC transformer rated at 500mA using 18AWG lamp cord.

  20. CCTV SYSTEMS • 12 volt 8 cell AA battery holders are also available for remote locations that utilize wireless cameras.

  21. CCTV SYSTEMS • The location of the CCTV equipment will need to have adequate power outlets available for all of the equipment to be plugged in. • A simple 16 channel system has other power requirements: The DVR, the monitor/s, the power supply, and any other miscellaneous power supplies.

  22. CCTV SYSTEMS • CCTV installs that have long cables runs usually 1000 feet or longer may run into voltage drop problems. • One way to address this problem is to step up to the next biggest wire gauge which we talked about in a previous lesson.

  23. CCTV SYSTEMS • If the cable is already in place then you have a choice, pull the cable out and run a larger gauge or…………………. • What would you do to address voltage drops in a long cable run? INSTALL AN ACTIVE BALUN/AMP