SIEMENS FIELD DEVICE CUOPLER FDC 157 6ES7157-0AC83-0XA0 6ES7 157-0AC83-0XA0, Field Device Coupler FDC 157-0 physical interface for PROFIBUS PA or Foundation Fieldbus H1 integrated bus supply up to 1000 mA with redundancy capability integrated diagnostics Degree of protection IP20 for extended temperature range