WBE2-I-CAN-ISO CAN Extension Module/en

Hardware

CAN extension module

The module is built on a physical layer chip TJA1051. CAN signals are galvanically isolated from the controller.

The module contains a 120 Ohm terminator between the H and L lines. To enable it, you need to close the jumper on the top side of the board.

Operation in UART-CAN mode

The WBE2-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.

The module can be installed in MOD1 and MOD2 slots of the Wiren Board 6 controller.

Pinout

The CAN signals are output to the O1-O3 terminals of the extension module.

Pinouot:

Terminal	Function
O1	CAN L
O2	CAN H
O3	CAN GND (Isolated GND)

Configuration

CAN extension module

Configuration is set in the web interface: Configs section => Hardware Modules Configuration.

Choose WBE-I-CAN-ISO in Internal slot 1/2 and click Save.

The device is detected immediately, no reboot is required.

Operation

Module operates in UART-CAN mode identically to the RS-485 extension module, see description.

CAN configuration in Wiren Board