Moxa CN2650-8-2AC-T Terminal Server 仕様ガイド
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Terminal Servers
Overview
LCD panel for easy IP address configuration (not included with
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wide temperature models)
Dual-LAN cards with two independent MAC addresses and IP
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addresses
Redundant COM function available when both LANs are active
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Dual-host redundancy can be used to add a backup PC to your
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system
Dual AC power inputs
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Real COM/TTY drivers for Windows and Linux
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CN2600 Series
8 and 16-port RS-232/422/485 terminal servers with dual LAN redundancy
Redundancy is an important issue for industry, and several different
solutions have been developed to prevent damage caused by
equipment or software failures. “Watchdog” hardware is required to
utilize redundant hardware, and a “Token” switching mechanism is
required for software. The CN2600 terminal server uses its built-in
Dual-LAN ports to implement a “Redundant COM” mode that keeps
your applications running smoothly.
solutions have been developed to prevent damage caused by
equipment or software failures. “Watchdog” hardware is required to
utilize redundant hardware, and a “Token” switching mechanism is
required for software. The CN2600 terminal server uses its built-in
Dual-LAN ports to implement a “Redundant COM” mode that keeps
your applications running smoothly.
Dual-LAN Redundancy
The CN2600 has two separate LAN ports that can be connected to
separate LAN networks. Dual-LAN redundancy involves setting up two
separate physical networks to connect the PC host with the CN2600.
In this case, the PC host must also be installed with two LAN cards. If
one of the networks fails, the PC host will still be able to communicate
with your serial devices over the redundant LAN.
separate LAN networks. Dual-LAN redundancy involves setting up two
separate physical networks to connect the PC host with the CN2600.
In this case, the PC host must also be installed with two LAN cards. If
one of the networks fails, the PC host will still be able to communicate
with your serial devices over the redundant LAN.
Redundant COM
Moxa provides an easy-to-use function, called “Redundant COM,” for
duplicating the CN2600’s data transmissions. In this case, when the
CN2600 receives a data packet from a connected device, the CN2600
will automatically duplicate the packet and send both packets over
separate LANs. If either of the two LANs fails, the other LAN will
continue transmitting packets between the serial devices and the host
to prevent lost packets. The Moxa driver is programmed to compare
packets received from the two LANs, and then discard duplicate
packets to prevent the host AP from receiving the same packet twice.
The Redundant COM function not only prevents data loss when one of
the LANs fails, but also prevents the host AP from receiving garbage
data.
duplicating the CN2600’s data transmissions. In this case, when the
CN2600 receives a data packet from a connected device, the CN2600
will automatically duplicate the packet and send both packets over
separate LANs. If either of the two LANs fails, the other LAN will
continue transmitting packets between the serial devices and the host
to prevent lost packets. The Moxa driver is programmed to compare
packets received from the two LANs, and then discard duplicate
packets to prevent the host AP from receiving the same packet twice.
The Redundant COM function not only prevents data loss when one of
the LANs fails, but also prevents the host AP from receiving garbage
data.
Dual-host Redundancy
The CN2600’s dual LAN cards can also be used to set up “dual-host”
redundancy. In this case, both networks (LAN A and LAN B in the
figure) are connected to two different hosts. If either of the two hosts
shuts down unexpectedly, the other host will continue transmitting
packets to (and receiving packets from) the serial devices connected
to the CN2600.
redundancy. In this case, both networks (LAN A and LAN B in the
figure) are connected to two different hosts. If either of the two hosts
shuts down unexpectedly, the other host will continue transmitting
packets to (and receiving packets from) the serial devices connected
to the CN2600.
Host
Data A
LAN A
LAN B
LAN B
Data A
Data A
Serial
Data A
Data A
Ethernet
RTU
Host
LAN A
LAN B
LAN B
Data A
Data A
Serial
Data A
Ethernet
RTU
Failure
Host 1
Data A
LAN A
LAN B
LAN B
Data A
Host 2
Data A
Data A
Ethernet
Data A
Serial
Data A
RTU
Dual-LAN Redundancy
Redundant COM
Dual-host Redundancy