LioN-Link is the new modular IP 67 distribution system for decentralized utility directly at the field level. The LioN-Link system consists of bus coupler modules which provide the connection between the entire fieldbus system and the fieldbus independent I/O modules. Based on a BusHead, the I/O module is distributed decentrally to the field via two lines. A total of 15 devices per branch can be connected to the system for a total extension of 100 m per branch.