DIN EN IEC 62439-3 : 2018 Title: Industrial communication networks - High availability automation networks - Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR) (IEC 62439-3:2016); English version EN IEC 62439-3:2018 Year: 2018 Publisher: DIN Media GmbH Availability: Within 1-2 working days