The ESV-PN bus node handles communication between the valve terminal and a higher-order PROFINET master. The module has basic diagnostiv functions. It has 6 integrated LEDs for on-site display. Two M12 connectors (4-pin socket, D-coded) for PROFINET I/O connection and one M12 connector (5-pin plug, A-coded for power supply. Both sonnections are equivalent 100Base TX Ethernet ports (as per IEEE802.3). There is also an integrated switch funtkcion that enables free selection of the ports BUS1/BUS2 for PROFINET communication.