What is RS485 and How it's used in Industrial Control Systems?

Great video!

This was very basic explanation.

Max, how many devices you can connect in RS 485

Great educational tutorial from RealPars, many thanks.

My new residential heat pump uses rs 485 for thermostat and communication between the air handler and the compressor condenser. To bad Honeywell and others stick to the 5 wire c configuration…

Thank you for the video.
I have a question, what is the maximum length that can be used for an ethernet cable?

Nice tutorial regarding RS45 data cable in comparasion RS233

can you please with the wiring of 360 Visions Predator CCTV System? I have wired it through the Matrix Control Unit16/2 -and the joystick VKXM-0845-EU controller with RS485 cables, all that is coming out of the camera is a bunch of wires that have been chopped off. I have managed to identify all of them, but am unsure as how to wire the 4 wire twisted pairs, i.e., Red & Orange TX/ and Purple & Blue RX From the camera do they go to the matrix or the controller, and which pins on a RJ11 6 wire plug? any help would be very much appreciated as 360 vision diagrams only cater for the special power supply connector board, there seems to be no circuit diagrams available, I can supply pictures...

I like this easy explanation

nice video

in your video for Rs-232, you indicated that the maximum cable length is 100 feet. while in this video is 50 feet. which one we should consider?

Hello, I have a question about 485 communication.
Is it possible with a “D1 MINI WEMOS Pro 4M 16M” using “Tasmota” e.g., B. to control a “JUNTEK DPM8624 60V24A Programmable DC/DC Digital Adjustable Step Down Voltage Power Supply Buck Converter 485 Communication”?

Where the limit of 32 devices comes from? I have electricity meters connected to rs485. It uses mbus and there is lot more devices than 32 and everything works. I'm confused.

its a very good informative video. Just a little correction, when you say that an that an RS-485 network can only support 32
nodes. This is not true. Device manufacturers now sell 1/4 UL transceivers (DS1487) and even 1/8 UL parts (MAX1482).
Assuming each node presents 1/8 UL to the transmission line, an RS-485–compliant network may sport as many as 256 nodes (32 UL × 8 UL/node = 256 nodes).

Which software using for create this video

Hi RealPars, thanks for such an informative video. I have a question though. You showed in the video that the PLC and VFD are connected via RS-485. But what about the input and output terminals? Are input and output (i/o modules) needed in this system for control? My understanding was that we use the i/o module of the PLC to connect the VFD or any other type of field sensors, but it looks they are not needed once we connect the VFD with PLC via RS-485. Can you please clarify between the difference or relationship between input/outputs and communication standard? How these two work together in a system? Thanks a lot.

nice 1

Appreciated your explanation in a very simple way. Thanks

Is RS-485 communication medium only used in Modbus communication protocol? Or is it used by other communication protocol in industries too?

You just explained in a high level. Can you put a video about RS485 with deeper electrical specs and communication data format

Thanks sir

Thank you, your video helps me to understand RS 232 and RS 485

What will be the gauge of the rs485 which allow 1200m

Thanks a lot.and more power.

thank you really I like that. 👍🏻

thank you so much!

Nice sharing

Very good

Thanks for the information. It left many basic questions unanswered (like what are the wiring and signals used and how are the basic protocols over RS-485 work).

Hoping to see a more in-depth video on those in future

Could You Please make video on XY MOD2 humidity & Temperature sensors and its connection with input modules and PLC.

Thanks

Thanks for this video.could you make a video for all type of protocol communication (Rs485,IEC,modubus)

I'm creating industrial automation projects. Yes, my brand is not Siemens, but those interfaces are still widely used despite the opinion that they are obsolete. That is not true. RS-232 is used for PC program upload/download/online mode in my projects. RS-485 (together with Ethernet) is used as main interface between the devices. On the other hand equipment which supports EtherCAT, CANopen and other modern time interfaces is more expensive. In most cases fast interfaces are not needed, so RS-485 meets the requirements.

RS232 maybe older but that doesn't make it better or faster... RS485 can run up to modern standards of 250k baud+ and is fault tolerant and self correcting, which is why it's an industrial standard used on oil platforms (before optical) and nuclear power plants... Used in both monitoring and control scenarios.

Thanks this time and every time.please keep doing the right things👍👍👍👍👍

Jesus, 700k views for a geek as fck video

So it is correct say that Profibus is based on Rs485 protocol ?
Thanks a lot for the video

Is RS-485 a protocol or an electrical standard? When I use RS-485 in the field, it is usually either security panels or PTZ camera controls, and each of those use different proprietary communications protocols OVER an RS-485 connection. One example is Honeywell panels that use RS-485 and their own communication protocol and so require Honeywell gizmos to interpret their protocol and translate to RS-232 which is then converted to Ethernet to talk to a server and database. It is akin to speaking the same language over a telephone, but someone who doesn't speak that language needs a translator. Another example is a PTZ camera that has an RS-485 2-conductor cable back to a PTZ controller. Just having the cable connection is not enough, they both need to be set to a particular communication protocol (speak the same language over the line) such as Pelco-D, Samsung, Vicon, as well as having the same baud rate.

thanks, my right ear got it!

You made a Great job in this channel , thanks you to much

Nice video, btw what is the differences between using RS485 vs analog input output for communication between PLC and VFD? THX

Nice video! Very didactic! 💯 I think the only missing thing was to mention the 2-wire o 3-wire type of RS-485 and the terminator resistors or voltage bias at each end of the network

I want to convert from RS232 to RS485 (My HMI and PLS ports are RS232) and I am using an Optical Fiber extender with RS85.

Please which of the pins (from 1-9) do I use as my positive and negative on the serial port pin?

nice video!. Thanks for teaching us all the time!

A communication bus that is easier to use than RS-485. The bus can provide power 20A

how to check Furness temperature by Temperature indicator & HMI?