NPort 6000 Series Module Settings
NM-TX01, NM-TX02, NM-FX01-M-SC,
NM-FX01-S-SC, NM-FX02-M-SC, NM-FX02-S-SC
Using Ethernet Redundancy
Setting up Ethernet Redundancy on your NPort 6000 network helps protect critical links against failure,
protects against network loops and achieve the Ring topology, and keeps network downtime at a minimum.
The Ethernet Redundancy function allows the user to implement several NPort 6000 units into a Ring topology
to provide a backup data transmission route in the event that a cable is inadvertently disconnected or damaged.
This is a particularly important feature for industrial applications, since it could take several minutes to
troubleshoot, such as locating the disconnected or severed cable. Several minutes of downtime could cause a
big loss in production and revenue. The NPort 6000 supports three different protocols for this Ethernet
redundancy function—Rapid Spanning Tree Protocol (IEEE-802.1w), Turbo Ring, and Turbo Ring 2.
ATTENTION
The Ethernet redundancy function can be used with NPort 6450 and NPort 66
00 units that have a network
expansion slot and are equipped with any of the network extension modules listed below:
NM-TX01/NM-TX01-T Ethernet module with 1 RJ45 port
NM-TX02/NM-TX02-T Ethernet module with2 RJ45 ports
NM-FX01-S-SC/
NM-FX01-S-SC-T
Ethernet module with a single-mode fiber port and SC connector
NM-FX01-M-SC/
NM-FX01-M-SC-T
Ethernet module with a multi-mode fiber port with SC connector
NM-FX02-S-SC/
NM-FX02-S-SC-T
Ethernet module with 2 single-mode fiber ports with SC connectors
NM-FX02-M-SC/
NM-FX02-M-SC-T
Ethernet module with 2 multi-mode fiber ports with SC connectors
Turbo Ring,” “Turbo Ring V2,” and STP/RSTP protocols cannot be mixed on the same ring. The table below lists
the key differences between each ring type. Use this information to evaluate the benefits of each, and then
determine which features are most suitable for your network.
Protocol STP RSTP
Topology Ring, Mesh Ring, Mesh
Recovery Time Up to 30 sec Up to 5 sec
Moxa developed the proprietary Turbo Ring protocol to optimize communication redundancy and achieve a
faster recovery time on the network. The protocol is implemented on both the Ethernet and the serial device
server. Because of the differences in behavior of a switch compared with a device server, the recovery times
will also different.
Protocol Turbo Ring Turbo Ring 2
Topology Ring Ring
Baudrate /
Recovery Time
921.6 Kbps Up to 100 ms 921.6 Kbps Up to 100 ms
9600 bps Up to 40 ms 9600 bps Up to 20 ms
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