Distance I can get for Expander

Hi there! Is there any way I can connect Expander to DSnake on 600m? Large production is coming up!
Tried to connect Expander to dsnake via switch (Palm Switch 500) - red light!(

Maybe fiber optic?

You can use a Layer 2 Cat5 to fibre converter provided it supports Fast Ethernet. More here:
https://support.allen-heath.com/Knowledgebase/Article/View/703/0/can-i-run-dsnake-through-a-network-switch
https://support.allen-heath.com/Knowledgebase/Article/View/1152/0/gigaace-and-dx-networking-and-fibre-optics