What is the repeater needed for expanding RS-485 network?

[swapgo]

REpeater in RS-485?

I have PC connected over a Rs-485 network now I want to expand the network Currently I have 5 devices.
To expand the network I heard we should use repeater. What is that repeater. Can anyone please explain??

Regards
Gopi

 

[C-Man]

Re: REpeater in RS-485?

Normally you only need a repeater if you have more than 32 devices or more than 4000 feet wirelenght.

Read more for example here:
**broken link removed**

best regards