Archive for the 'PTZ Cameras' Category

132 High Illuminator LEDs, Auto Switch mode, 200 ft range

October 23rd, 2008 by Jesus Oredroc

The Auto switch mode turn on the LED’s as soon as it turns dark. It is made of sturdy aluminum and come with a metal bracket, ideal for outdoor installations. It is powered by 12V 1200mA.

The DM-IL-50IH is the perfect solution for your IR illumination needs. This security IR Illuminator has a powerful 132 LED’s capable of illuminating up to 200 feet.

Also other features are:

  • 132 High Illumination LED’s
  • Auto Switch mode
  • Max Range: 200 ft.
  • Power Supply 12V, 1200mA
  • Weather Proof
  • Sun Shield
  • Aluminum Cylinder housing with metal bracket

Category: Overview News, General CCTV, PTZ Cameras, Products Review | No Comments »

PTZ Controller Keyboard For PTZ and Speed Dome Security Camera w/ built-in 3.5″ TFT LCD Monitor

October 23rd, 2008 by Avital Guy

The DM-PTC-TP-3000 is a pan/tilt controller that allows operators to perform the following functions: It controls camera function such as pan, tilt, zoom, and focus. Sets and calls camera preset position. Activates pre-programmed grouped presets, touring and grouped sequences. The built-in 3.5″ TFT LCD is used to display current status as well as to provide a menu system for setting operational parameters. The DM-PTC-TP-3000 is designed for desktop operations. The interface connectors are located in the Junctions Box on the outer of the unit.

FEATURES

  • Recalls up to 255 cameras from one keyboard
  • Multiple protocol supported in each channel (Pelco D, DRX-502)
  • Preset position control
  • Variable manual control speed from 1°/sec to 90°/sec
  • Maximum speeds are proportional to zoom ratio
  • Recalls programmed guard tours from each dome camera.
  • Recalls Auto-Swing from selected dome camera.
  • Built-in Graphic LCD monitor with blue backlit screen.
  • Programmable user preferences. (preset, tour, group, etc)
  • User password support
  • Support DVR protocol
  • Easy upload programmed data via serial communication port of computer.
  • Slave Keyboard support.

Category: Overview News, CCTV Technology, General CCTV, PTZ Cameras | No Comments »

Security camera selection Guide

December 5th, 2007 by Avital Guy

How to choose a camera for security purpose?
There are many types of security camera in the market. Which one is suitable for you? These types of security cameras may come in different shapes and technologies from Bullet camera to dome camera, infrared, day night…with or without audio capability. Make sure you choose the right security camera to suit your needs. This wizard will help you select the right security camera types that will suite your needs.

 

 

 Security camera selection guide

Click Here to use our security camera selection Guide

Category: Overview News, Security Camera, Network IP Camera, CCTV Technology, General CCTV, PTZ Cameras | No Comments »

Zoom Lenses for security Cameras

September 7th, 2007 by Avital Guy

As digital security cameras continue to advance even more every day in picture quality and DVR compression, digital and optical zoom lens. When we looking on security camera lens you will notice that the specifications for digital cameras lens or their descriptions measure the lens as a number of times. For example a lens may be described as 10x or 22x. This spec referred to the zoom ratio.

The Basics rules of Calculating the Number of Times or Zoom Ratio.

Security cameras have feature that called a focal length. This spec applies to any security camera regardless of the type of lens. The focal length is measure the distance from the optical center of the lens to the camera’s focal point.

Security camera focal lenght 

For security camera without a zoom lens the focal length is called fixed lens as the lens never changes position. Therefore the distance or focal length between the lens and sensor stayed the same. Security camera which have the ability to zoom in and out are called Vari-Focal security camera.

When using security camera zoom lens the position of the lens changes as you zoom in or out. As you zoom in the focal length increases. As you zoom out the focal length decreases.  The focal length of security camera is always measured in millimeters. The 5 mm represents the minimum focal length when the zoom is not being used. The max 50mm is the focal length when the zoom is fully extended.

Digital Zoom
It is common to see two zoom ratios in a security camera spec. One is for optical zoom already discussed above and the second is for digital zoom. Digital zoom is completely different to optical zoom. Rather than using the lens to zoom in or out, security camera digital zoom is carried out by software inside the camera or the DVR system. Basically the software increase the size of the image to give the impression of zooming in. stretching the picture size will usually create decrease in picture quality. Therefore optical zoom is considered far superior to digital zoom.

On a security camera offering both optical and digital zoom you can use both stimulatingly. For example a camera with 10x optical zoom and a 4x digital zoom can give a combined total of 40x zoom.

Zoom Security camera 

Zoom Security camera.
Security cameras are divided to number of groups. Box Security camera, Dome Security camera, Bullet camera, Infrared camera, PTZ camera, Etc. PTZ camera are security camera that give you the option to remotely control Pan-Tilt- Zoom of the camera. Zoom security camera in the other hand has the functionality only to zoom in or out remotely, controlled by a DVR or keyboard control device. Zoom camera is vary function and let you zoom in and out in with high picture quality and control. Zoom security camera is using the same technology of PTZ camera which requires the use of PTZ controller. For more information on how to install PTZ camera please refer to the article

Category: Overview News, Security Camera, Security DVR, PTZ Cameras | No Comments »

How to connect PTZ Camera (Pan Tilt Zoom) to your DVR system

July 30th, 2007 by Avital Guy

PTZ cameras are security cameras that have the ability to change their positions, depending on the PTZ camera type, you can Pan Tilt and Zoom the camera remotely.
For the technology to work the DVR systems, controller keyboard and PTZ cameras have to run on the same protocol and interface before they can communicate. When looking to purchase PTZ camera equipment, please make sure they are compatible. Pelco D protocol with RS485 interface is the most common way to interface and control a PTZ camera.
PTZ Camera Connection DiagramPTZ Camera Interface between devices: For the DVR system to communicate with the camera, Command protocol has to be transmitted from the DVR or controller keyboard through an interface conduit to the PTZ camera. RS485 or RS232 are the common interfaces for PTZ that are done by running a single pair or twisted pair cable from the DVR to the PTZ camera. An RS232 is usually used when it is at a very short distance. RS485 interface can work over very long distances, and is used by most PTZ cameras. Most of the standalone DVR’s have RS485 interface. PC based DVR have an RS232 interface with a converter to RS485.
DVR’s, whether it’s a PC based or Standalone DVR need to send out command signals to PTZ cameras to control pan, tilt or zoom. In the other side the PTZ camera must understand these commands to be able to follow the instructions.  To enable the two devices to understand each other, they need to speak the same language, which is called a PROTOCOL. The most common protocol for PTZ cameras is the Pelco D. If you are planning to purchase security DVR system and PTZ security cameras, please make sure they support the same protocols.
Multi PTZ camera. Installation of more then one PTZ camera on the same CCTV system you need to tell the DVR how to differentiate between the cameras. This feature will let you control specific cameras without affecting the others. PTZ cameras have dip switches that you can select different camera addresses for example: camera 1 ID=1, camera 2 ID=2, Camera 3 ID= 3 etc. Check your camera manual for instructions how to setup camera ID.
 
Connecting a PTZ camera to a DVR
To connect a PTZ camera to a DVR, you need three types of cable ( See diagram)

  1. Power cable mostly reffered to as 18/2 to send 12V or 24V power to the camera ( If you are using Siamese cable, it will have both Power and Coax in one). Connect from the power supply to the DC or AC connector on the security camera.
  2. RG59 Coax. Connects from the BNC connector on the camera to the BNC camera in on the security DVR this is the Video signal cable, which will send the video signal from the camera to the DVR.
  3. Pair / Twisted Pair cable. Any copper pair cable that will send the PTZ command from the DVR to the PTZ camera. This cable connects from the RX+ RX- on the PTZ camera to the RS485 connector on the Security DVR or PC Based DVR.

DVR Setup
On the Security DVR whether it’s a standalone or PC based, you need to set the devices protocol, baud rate, and camera ID on the DVR depending on the specs provided to you by the camera manufacture. Of course, all PTZ camera IDs on the same system have to be unique. Make sure to map the camera inputs with the corresponding IDs.
If you are installing multiple PTZ cameras on one DVR system, please be careful of the wiring scheme for RS485 interface. There are two ways:

PTZ Connection Diagram

1. All the Coax cable RG59 and Power run from each camera to the Security DVR or PC based. All twisted pairs would run from each camera and combine all the RX+ from all the camera and the RX- from all the cameras and connect to the same interface on the RS485 on the DVR (Please sure that the polarity for the twisted pair is right). The longest run cable would have to be terminated with a resistor,
2. Daisy chain: Run the twisted pair from the RS485 interface on the security DVR to the closest security camera, then, from this camera to the next PTZ camera, and to the next camera until you get to the furthest camera.

Daisy Chain Diagram PTZ 

 

 

Category: Overview News, Security Camera, CCTV Technology, PTZ Cameras | 10 Comments »