View source for Модуль расширения CAN (WBE-I-CAN-ISO) wb6/en

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{{DISPLAYTITLE:MicroSD extension module (WBE-MICROSD)}}

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== Hardware ==

[[Файл:WBE2-I-CAN-ISO-1.png|thumb|300px| CAN extension module]]

The extension module uses MCP2551 physical layer interface.
CAN interface signals are galvanically isolated from the controller.

Can be installed only to MOD2 extension slot.


The module contains a 150 Ohm terminator between the H and L lines. To enable it, close the jumper on the top edge of the board.

== Operation in UART-CAN mode ==
The WBE-I-CAN-ISO module operates in UART-CAN mode. The UART-CAN bus (also called sometimes simply CAN or RS-CAN) uses the physical can layer for the half-duplex serial port of the UART.

The UART-CAN bus is mainly used in metering devices such as Mercury energy meters.

In UART-CAN mode, the module can be installed in any expansion slot, so you can install two WBE-I-CAN-ISO modules

== Pinout ==

CAN signals are routed to the expansion module terminals O1-O3.

Pinouot:
{| class="wikitable"
!Terminal
!Function
|-
|O1
|CAN L
|-
|O2
|CAN H
|-
|O3
|CAN GND (Isolated GND)
|}


==  Configuration ==
[[Файл:Hwconf-can.jpg|thumb|300px|CAN extension module]]
Configuration is set in the web interface: Configs section => Hardware Modules Configuration. 

For CAN mode: in Internal slot 2, select "WBE-I-CAN-ISO" and click Save.

For UART-CAN mode: make sure that the corresponding slot (Internal slot 1 or Internal slot 2) is set to "None".

The device is detected immediately, no reboot is required.

==  Operation ==
In CAN mode, it is defined as can1. About can on Linux, see [[CAN/en| CAN]].

Module operates in UART-CAN mode identically to the RS-485 extension module, see [[Wiren Board 5: Модуль расширения RS485-ISO/en|description]].

== Compatibility table ==
{| class="wikitable"
!Mode
!Controller
!Audit
!MOD1
!MOD2
|-
|CAN
|Wiren Board 5
|5.3, 5.6
|<nowiki>-</nowiki>
|<nowiki>+</nowiki>
|-
|UART-CAN
|Wiren Board 5
|5.3, 5.6
|<nowiki>+</nowiki>
|<nowiki>+</nowiki>
|}