DIN EN 62439-4 (2009-09)被替代
Industrial communication networks: high availability automation networks Part 4: Cross-network Redundancy Protocol (CRP) (IEC 65C/519/CDV:2008); English version FprEN 62439-4:2008
出版：German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻
