The International Electrotechnical Commission (IEC) has unanimously approved Sercos III, the real-time Ethernet version of the Sercos interface, as part of international standard IEC 61784-2 (Digital data communications in control technology) and IEC 61158 (Field bus for industrial control systems).
This third generation of the widely accepted interface integrates with the open Ethernet protocol offering high-speed data transfer at 100 MBit per second. Additional innovations include improved safety, the construction of efficient networks with minimum cabling due to a redundant ring and line structure, and specific cross communication traffic between control systems.
Version 3 offers a clear migration path from previous versions. Sercos I has been a worldwide standard since 1995, and the more flexible Sercos II followed in 1999. Now, all three generations conform to the international IEC standards, which ensures the interoperability of products from diverse manufacturers, using the same standard interfaces, operating commands and synchronization methods.
Version 3 works with CAT-5 copper cables as well as optical fiber waveguides. It transfers data packets according to the TCP/IP Internet protocol. Several security functions and secure full duplex operation ensure trouble-free real-time operation.
: Design World :
Filed Under: Ethernet — cables • hubs • switches