View source for Wiren Board 5: Модуль расширения RS485-ISO/en

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Module with galvanically isolated RS-485 interface.Isolation voltage: 1.5 kV The speed is up to 1 Mbit / s. 

The module contains a 150 Ohm terminator between lines A and B. To enable it, you need to close the jumper on the top side of the board.

== Pinout ==

[[Файл:RS-485.png|thumb|300px|Extension module RS485-ISO]]

RS485 signals go to extansion module terminals signed O1-O3. 

{| class="wikitable"
!Terminal
!Function
|-
|O1
|A (D+)
|-
|O2
|B (D-)
|-
|O3
|Isolated GND (Common, C)
|}


==Configuration== 
Configuration of the web interface is carried out in the section Configs => Hardware Modules Configuration. 

No special configuration is required. 
You need to make sure that the corresponding slot (Internal slot 1 or Internal slot 2) is set to "None".

==  Operation ==

Port is available in the system as 

* /dev/ttyAPP2 - when installed in the first slot for extension module (MOD1)
* /dev/ttyAPP3 - when installed in the second slot for extension module (MOD2)


For operation you need to disable hardware flow control. Additional configuration of the port as the RS485 is not required.