Eaton C441R User Manual

Also see for C441 Series: User manual

Contents

9User Manual MN04200002EEffective January 2016C441 Ethernet module user manual(C441R, C441T, C441U, C441V)EATON www.eaton.comLinear Network ConnectionIn a Linear network the number of external switch ports can bereduce, or the external switch can be eliminated all together. Thefigure below depicts three Motor Insight modules connected to aPLC without any external switch.Figure 6. Linear Network Connection ExampleIt does not matter which port (P1 or P2) is used for each connectionshown in the diagram.Ring Network ConnectionSome PLC systems and external switches provide support for ringnetwork topologies. In these systems a closed ring is formed anda special algorithm is used to allow communications to continueeven if a cable becomes disconnected or one of the ring devices isremoved.Figure 7. Ring Network Connection ExampleIt does not matter which port (P1 or P2) is used for each connectionshown in the diagram.P1P2P1P2P1P2PLCP1P2P1P2P1P2PLC(WithRingSupport)Two common ring algorithms are:• Rapid Spanning Tree Protocol (RSTP)• Device Level Ring (DLR)While the Motor Insight does NOT directly execute these algorithms,it has been designed to be included in these two types of rings. Thefigure below depicts three Motor Insight units connected in a ringwith a PLC that supports a ring algorithm.