Compulab IOT-DIN-IMX8PLUS IoT Edge Gateway - IFM-RS485 port access

Hi

When using a Compulab IOT-DIN-IMX8PLUS IoT Edge Gateway with the IFM-RS485 expansion module, how can the RS485 ports be accessed from within BalenaOS. What /dev/ttyX are these ports mapped to? Does this require a custom BalenaOS image with custom device tree overlay?

Thank you.

Pieter.