6ES7155-6AU01-0CN0Product Overview The Siemens 6ES7155 6AU01 0CN0 is a PROFINET 2 port interface module from the SIMATIC ET 200SP line. Designed for high performance distributed I O systems, this IM155 6PN 2 High Feature module supports up to 64 I O modules and 16 ET 200AL modules. It includes a server module and supports isochronous mode, making it ideal for time critical applications. Key Features Supports S2 system redundancy and media redundancy (MRP) Multi hot