Pro-face Flex-Net I/O Durability

We have started a project using Pro-face Flex-Net. We have discovered the documentation states there is no overload/short protection. Does anyone have expieriance using this product. We are at a point where although it would cause some setback to change it would still be possible so we need to know if there will be an issue with losing I/O modules due to the common mis-wiring etc. that comes with a typical startup.