Iqan in ATEX application

We are looking to use Iqan MC43FS units in an Atex application mounted within EXD explosion proof enclosures but I am trying to find out any relevant information regarding passing the CANbus cabling through the Hazardous area and out to an MC41FS and an MD4-10 mounted in a safe zone. Can anyone provide me with any relevant information on this or has anyone used CAN to optical devices with Master to Master Communication bus in a safety application?