RS-232 vs RS-485 Control Cabling (DB9 and RS-422 Explained)
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- Опубліковано 22 сер 2016
- RS-232 vs RS-485 Control Cabling (DB9 and RS-422 Explained)
In this tech support Tuesday Andy Chatfield reviews the RS-232 and RS-485 PTZ camera control options. A common technical support question for Andy is "Should we use RS-232 or RS-485 for camera control?" Andy answers this question and reviews the differences between RS-232, RS-485 and RS-422 (which PTZOptics cameras do not support).
Andy goes over the complete Serial Joystick connection diagram for controlling multiple cameras and makes suggestions on cabling that can be used. A common implementation of camera control cabling is actually using something that integration companies already have run in the walls such as Cat-5 or Cat-6 cabling. Andy explains how to use Category Cabling camera control including the various pin-outs required for camera control. Finally, we review the different baud rate options for joystick and camera controllers. Andy is the lead support technician for PTZOptics and he asks users to submit a ticket or call the PTZOptics 1-800 phone number with any technical questions.
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Awesome video guys. You answered my questions for the final touches of our camera control configuration.
First terminology correction at 1:30.
Replace your use of the word cables with signals for RS232 discussion.
First technology correction at 2:15.
RS485 is two way communication.
I couldn't go through the rest of your video...
I hope this helps someone.
thanks for the correction this is the comment I was looking for
Connect 2 ptz cameras to dvr that has 1 rs-485 input? If It will move together its good for me
Top thanks
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I don't get it, on the diagram of the cameras and the controllers, it looks like the RS232 is daisy chained from camera to camera, but i didn't think you could daisy chain with RS232? seems abit misleading
Can I use the same 9 pin male/male cable to connect in port RS232 or in port RS422/485?
They are usually 8-pin connectors.
@@PTZOptics I have to buy a 9pin cable for a touch screen that the cable is broke. The port is RS422/485 and there is 9 pins in the connection port. Can I buy any 9 pin cable or there is a specific cable for RS232 port and port RS422/485 ?
Do you have a cable recommendation (product and vendor) for the type of cable pictured in the demo on RS485? Looking to control 3 PTZs with a joystick controller in a small (100 square foot) project studio. Everything I've seen online is in 500' spools. Thanks in advance!
WE don't have any recommendations, but any unterminated cable will work for rs-485.
I am very familiar with RS-232, 422 & 485, etc, including Modbus RTU & other proprietary software protocols. What software commands are used? Where can I find the protocol command spec used for PTZ cameras? GOT IT . I'M ALL SET, THANKS.
Hi, this is available at ptzoptics.com/downloads
We are a house of worship and we have PTZoptics Controller and one of your cameras. We use RS232 10FT cable that connects camera with the controller but we need about 10FT of RS232 cable. I wanted to ask if there is a better way to connect like SDI or other cables when long distance involved.
Nikolay Voytovich You just need a DB9 extension cable. We sell them in 25' lengths
can anyone tell me the name of the adapter that red and black cable connected to the RS485....just that blue adapter please
It's called a Phoenix Connector
I have a Huddlecam HC-Joy- G3 pTZ controller with rs-422 pins. I have three PTZOptics 30X-SDI Gen 2 cameras with rs-485 pins. How do I connect radio-422 wires to rain-485? The distance is between 100 and 60 feet.
L. Clark - the PTZOptics cameras include a DB9 to 8 pin mini din cable. You can use this with the DB9 extension cable for the first camera and cascade extension cables for the next two
For a DATA Rs 422 on a Camera we got from the highway patrol it has 5 wires can any of the two or 3 be connected to a joystick if we only have one camera and we only want to control that not receive back info? The colors are R B G W and Blue any thoughts ?
Hello,
To control a camera using RS-422 with a joystick controller, you'll need to connect the appropriate wires from the camera to the corresponding inputs on the joystick. RS-422 typically uses a differential pair for transmitting data, but the presence of five wires (Red, Black, Green, White, and Blue) in your setup indicates there may be additional functionalities or grounding/shielding involved.
Here's a general guideline, but please note that without specific wiring diagrams or manufacturer instructions, this is a bit of guesswork:
Understanding RS-422 Wiring
RS-422 Standard: Typically, RS-422 uses four wires - two for transmitting data (TX+ and TX-) and two for receiving data (RX+ and RX-). However, different manufacturers might have variations.
Possible Wire Designations:
Red (R) and Black (B) are often used for power (V+ and V- or GND).
Green (G) and White (W) could be the differential data pair for either TX or RX lines.
Blue might be an additional ground, shield, or a control line.
Basic Connection for Control
Identify Data Wires: You need to determine which wires are for RS-422 data transmission. If there's no documentation, you might need to experiment or contact the manufacturer.
Connect to Joystick: Typically, you would connect the TX+ and TX- from the joystick to the corresponding RX+ and RX- on the camera. Since you only want to control the camera, you might not need to worry about the camera's TX lines.
Steps to Try
Consult Documentation: First, check any available documentation for the camera and the joystick controller to identify wire functions.
Test Connections: If documentation isn’t available, you might need to test connections. Start with the data wires (possibly Green and White) and connect them to the RS-422 input on the joystick.
Power Considerations: Be cautious with the Red and Black wires, as they are likely power-related. Incorrectly connecting power can damage the equipment.
Grounding: Proper grounding is important. The Blue wire might be a ground or shield wire.
Safety and Caution
Be Cautious: Incorrect wiring can damage the camera, the joystick, or both. If you’re not sure, it’s best to consult with a professional or the equipment manufacturer.
Manufacturer Support: Reach out to the manufacturer or supplier of the camera for specific wiring information.
Conclusion
Correctly connecting a camera to a joystick for RS-422 control requires accurate knowledge of the wiring scheme used by the camera. Without clear documentation, there is a risk of trial and error. The safest approach is to obtain a wiring diagram or detailed specifications from the manufacturer or a qualified technician.
Can I home run from each of 3 cameras to the Joy stick? I am looking at HD Joy G2
Yes, you can run homeruns using RS-422. I would give our support team a call so they can explain. There is also a knowledge base article about it.
Thanks for that info. I just checked the knowledge base and this video covering Serial Control is very top generic explanation and only covers RS232 as I am looking into RS485. I need a more technical video. Also you referred to RS-422 instead of 485. Are these terms interchangeable?
I believe so but I would call or email our support team. I know they have a Knowledge base article about it somewhere.
Can any Joystick with RS-485 control the PTZ Optics camera.
Most can yes. The must support VISCA or PELCO which is fairly common.
Trilobyte google
can i connect not in daisy chain in some way?
Yes. Check out our cables page. The first cable from the joystick is a DB9 to 8-pin mini-din. When you daisy chain additional cameras you should use a “cascade cable” which is 8-pin mini-din on both sides
I have 2 SRG 300H Sony cameras how can I wire it with that controller?
Hello Ryan, The SRG 300H uses the same SONY VISCA protocol as our cameras PLUS they have the same 8-pin mini-din connection. So you can connect these cameras just like PTZOptics cameras shown in this video. If you have any other questions just let us know
So can we use regular CAT 5e to connect the controller and the cameras? I'm a volunteer on our church and we've been using an IR remote to control 2 cameras so we're planning to buy this controller cause sony controller is so expensive for us right now. and should we use RS485 or RS 422 Protocol?
Hi Ryan, You will want to use RS-232 or RS-485 cabling. I would suggest calling our office and speaking to someone in sales to make sure you get the correct cabling.
PTZOptics Hi can you tell me the name of the blue adapter that goes to the RS485 slot..I have the same dvr with the pin hole and I needed to find an adapter to connect my control cable from the ptz
Some of the information in this video is incorrect.
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The terminology is incorrect. The baud rate does NOT vary the AMOUNT of information transmitted, it varies the RATE at which the same amount of data is transferred between devices. So a high baud rate gets the information there more quickly. A low baud rate still gets the information to its destination but it takes longer. Baud rate is a trade off only in terms of time and distance. Long distances can introduce signal noise and timing issues which are made less problematic if a lower baud rate is used. The common 9600 baud rate is a good trade off between the two, giving decent speed and reliability.
There’s no such thing as the “DB-9” that you mention frequently. The “D” denotes the delta shape of the connector shell. The next letter denotes the number of pins; DA is a 15 pin connector such as those found on older joysticks. DB is the 25 pin connector such as those found on older RS-232 devices. DE is the 9 pin connector that you mistakenly refer to as the “DB-9”. If what you mean is a 9 pin connector such as that found on more recent RS232 devices then you can refer to it by the correct designation; “DE connector”.
Wow you are the first person who has ever said that to me. Interesting
@@StreamGeeks I was there when it happened. 😊
Hello!
Thank you for pointing out the technical discrepancy regarding the naming of the DE-9 connector, often colloquially referred to as the "DB-9". Your clarification is correct and appreciated. Let's clarify this for future reference:
DE-9 Connector
• Correct Name: The proper name for what is commonly called the "DB-9" connector is actually "DE-9."
• Design: The "D" refers to the D-shaped shell of the connector, and "E" denotes the size of the shell. The number "9" indicates the number of pins.
• Usage: The DE-9 connector is widely used in serial RS-232 communication and other applications. It became popular in computer and communication equipment, including certain models of PTZ cameras for serial control (RS-232/RS-422).
Common Misnomer: "DB-9"
Widespread Usage: Despite the technical inaccuracy, the term "DB-9" has been widely used in common parlance to refer to the DE-9 connector. This usage, while technically incorrect, is frequently encountered in various industries and among general users.
Importance of Correct Terminology
Technical Accuracy: In technical and engineering contexts, it's important to use the correct terminology. The precise naming of connectors can be crucial in ensuring the right specifications for compatibility and functionality.
Conclusion
While "DB-9" is a widely used term, the correct technical designation for the 9-pin D-subminiature connector is "DE-9." This distinction is especially important in professional and technical settings where precise specifications are required. Your attention to this detail is valuable, especially for those working in fields where such connectors are regularly used.
Bruce Jenner got a hero reward for changing his gender. If I use an RS-232 gender bender to connect a cable between two devices so they can communicate will you guys give me a hero reward?
Yes, you would definitely get an award!
Thank you. My mommy says I'm special, so this would make her very happy. I won't need to trade all my guy clothes in for girl clothes. I won't have to trade my andrologist in for a gynecologist in either, nor learn how to menstruate and have to buy Tampons and become irritable. You are the best!
You're really smart. Please explain why the female socket connector is called a "Jack"? Shouldn't the male plug be called the Jack and the female connector be called a "Jill"? Do you have any influence over the NEMA, IEEE, IEC or EIEIO to get this changed?
Intro toooooo long.
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uggg
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Learn More: ptzoptics.com/