{"id":26479,"date":"2021-09-29T18:01:23","date_gmt":"2021-09-29T23:01:23","guid":{"rendered":"https:\/\/learncctv.com\/?p=26479"},"modified":"2021-09-29T18:09:38","modified_gmt":"2021-09-29T23:09:38","slug":"connect-pelco-ptz-to-encoder","status":"publish","type":"post","link":"https:\/\/learncctv.com\/connect-pelco-ptz-to-encoder\/","title":{"rendered":"How to connect a Pelco PTZ to an Axis encoder (Using RS-485)"},"content":{"rendered":"

In this article, I show how to connect a Pelco analog PTZ camera<\/strong> to an encoder<\/strong>.<\/p>\n

\"Axis<\/span><\/p>\n

Yes, there are still some good analog cameras out there, and you can keep using them with your new IP surveillance system.<\/p>\n

Fundamentals of PTZ cameras and encoders<\/span><\/h2>\n

You have to understand some fundamental things before connecting your analog PTZ camera<\/strong> to an encoder. Let me go over a quick explanation of the topic.<\/p>\n

A PTZ camera can move in the horizontal (PAN) and vertical position (TILT) and also zoom in and out to get more details on the subject.<\/p>\n

How to control a PTZ camera<\/h3>\n

Devices such as computers (with monitoring software), DVRs, joysticks, and encoders can send commands to the PTZ camera via coax cables or a pair of wires. <\/p>\n

You can use the same coax cable to send video and commands to the camera if the camera and the device you are using have protocols such as Coaxitron <\/strong>(Pelco), CCVC <\/strong>(Hanwha Techwin), or Hik-C<\/strong> (Hikvision).<\/p>\n

==><\/strong> To learn more, read the article: PTZ camera coaxial control<\/a><\/p>\n

Let’s say your device or camera doesn’t have such protocols; in that case, you can use a traditional method with a pair of wires to send the commands to the camera.<\/p>\n

\"RS-485<\/span><\/p>\n

The diagram shows an example of a PTZ camera connected to a device using a pair of wires. As you can see, there’s a connector labeled “<\/span>RS-485<\/span><\/em><\/strong>” in the device on the right side; this is an international standard for communication between devices.<\/span><\/p>\n

The standard protocols<\/h3>\n

The analog PTZ camera and the device can use the RS-485 <\/strong>standard and a common protocol for communication; the most common one is the Pelco D<\/strong> protocol.<\/p>\n

This article focuses on a Pelco analog PTZ camera<\/strong> connected to an Axis encoder<\/strong>; however, the same principle applies to different manufacturers. As long as they use the same RS-485 and communication protocol on both sides, everything works.<\/p>\n

The communication parameters<\/h3>\n

Alright, it’s necessary to use the same standard and protocol for communication, but there’s something else you need to pay attention to… Which communication parameters are set on both devices (encoder and camera).<\/p>\n

It’s very simple; you have to make sure the parameter match on both devices.<\/p>\n

Here are the parameters I’m talking about.<\/p>\n