How can i test RS-485

Do you want to test the RS-485 serial protocol? I could not find a MAX-485 device.

it is an IC not a device sir.

looking again for MAX-485 IC ...

Do I understand it right that you want to test the RS-485 protocol on a MAX485 tranceiver?

I have some experience with other receivers from TI. What is the microcontroller you are using to talk to the MAX485?

Yes that is right, i was thinking about using a software on pc like SSCOM but i only knew about it today and to get USB TO RS485 Converter, and connect the pins of this adapter to the (A and B) of the IC, Then i connect the output pins of the IC to another USB TO RS485 Converter which is connected to a different USB port or even different pc , I do not know if this is stupid or not it is just what i thought about and no idea if it works. but i am looking for any way to test this IC.

It looks like you are doing something that's right. Connect two serial logic devises to each other via two RS-485 drivers. In my experience, that has always worked, if the logic devices have the same settings, and the drivers are connected correctly. RS-485 is a standard and the devises that claim to support it, usually do.

What is going wrong in your case?

It looks like you are doing something that's right. Connect two serial logic devises to each other via two RS-485 drivers. In my experience, that has always worked, if the logic devices have the same settings, and the drivers are connected correctly. RS-485 is a standard and the devises that claim to support it, usually do.

What is going wrong in your case?

Well the thing is i am not sure if it will work or not so i was asking before i buy the converters cuz it is not easy to get them here so if i will get them it must be worth is, And i still do not know what to do with the other pins of the IC. still looking for answers.

What other pins are you referring to?

RO and DI.

You can see the datasheet and this application note

AN-960 RS-485/RS-422 Circuit Implementation Guide Application Note (Rev. 0) (analog.com)

MAX490 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers | Analog Devices

I have used rs-485 communications to communicate with point of sale terminals and access control terminal from PCs. Normally using an rs-485 card or an USB dongle.From the PC it appears as a virtual serial port, it depends on the driver that you have been provided.

I don't understand very well what you want to do.

i see that useful thanks, what i want to do is to test if the ic is wotking or not, I am a maintenence engineer and for devices that have communication fault we cant be so sure if that ic (MAX458) for example is faulty , an so i am looking for a way to test the ic itself.

Ow. In that case I'd build a little testbed. The cheapest would most likely be 2 arduinos, one arduino CAN shield, and one custom little test-jig that you create to put the IC-under-test on. Test firmware already exists

So I think you can go for a simple circuit to test the chips on their receive and transmit functions.

See datasheet