Australia Posted 21 Oct 2011 I don't know should you had any success with this Greg, but I have a very similiar issue. My setup is: M340 connected to Connexium Ethernet Switch linked to EGX100 Gateway linked by way of modbus serial Sepam Safety relay. I've published the ST in https://johnnykyfrh.activablog.com/23471453/the-modicon-m340-diaries