I have a 205 rack with a 260CPU, discrete IO, an ECOM for HMI, and a ERM. The ERM network consists of a couple of T1H-EBCs one with a CITRO module and the other with some discrete IO. At the discrete location there will be a third party device that can comunicate via MODBUS RTU. I was wanting to use exsiting cabling to talk to this device.