VLT
®
AutomationDrive EtherNet/IP
MG.90.J1.02 – VLT is a registered Danfoss trademark
11
Ring/redundant line topology
AutomationDrive
VLT
AutomationDrive
VLT
AutomationDrive
VLT
AutomationDrive
VLT
AutomationDrive
VLT
½
AutomationDrive
VLT
AutomationDrive
VLT
N.B.:
For this type of topology it is crucial that the network switch supports Spanning Tree
Protocol (STP), and that STP is enabled.
For more information on Spanning Tree please refer to section
IP traffic
.
Network
It is of high importance that the media chosen for Ethernet data transmission are suitable.
Usually CAT 5e and 6 cables are recommended for industrial applications. Both types of cable are
available as Unshielded Twisted Pair and Shielded Twisted Pair.
Generally shielded cables are recommended for use in industrial environments and with frequency
converters.
A maximum cable-length of 100 m is allowed between switches.
Optical fibres can be used for gapping longer distances and providing galvanic isolation.
For connecting EtherNet/IP devices both hubs and switches can be used.
It is, however, recommended always to use suitable industrial graded Ethernet switches.
For more information regarding IP-switching, please refer to section:
IP Traffic
in this manual.