EDS-405 User’s Manual
Supported Ethernet Network Topologies
Redundant Ring Topology
Moxa developed the proprietary Turbo Ring protocol for better network
reliability and faster recovery time. Moxa Turbo Ring’s recovery time is less than
300 ms compared to a 3- to 5-minute recovery time for commercial switches,
decreasing the possible loss caused by network failures in an industrial setting.
The Turbo Ring protocol identifies one switch as the “master” of the network,
and then automatically blocks packets from traveling through any of the
network’s redundant loops. In the event that one branch of this ring becomes
disconnected from the rest of the network, the Turbo Ring protocol automatically
readjusts the ring (if possible) so that the part of the network that was
disconnected can reestablish contact with the rest of the network. The actual
topology of the redundant ring, i.e., which segment will be blocked, is
determined by the number of EDS-405s that make up the ring.
port 4/5
port 4/5
port 4/5
Master
port 4/5
port 4/5
port 4/5
EDS-405
1
2
3
4
5
10M
100M
PWR1
PWR2
FAULT
RING
MASTER
EDS-405
1
2
3
4
5
10M
100M
PWR1
PWR2
FAULT
RING
MASTER
EDS-405
1
2
3
4
5
10M
100M
PWR1
PWR2
FAULT
RING
MASTER
4-2
