Datasheet

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Terminal Servers
Overview
CN2600 Series
LCD panel for easy IP address configuration ›
Dual-LAN cards with two independent MAC addresses and IP ›
addresses
Redundant COM function available when both LANs are active ›
Dual-host redundancy can be used to add a backup PC to your ›
system
Dual AC power inputs ›
Real COM/TTY drivers for Windows and Linux ›
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.
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.
Redundant COM
The “Redundant COM” (patent pending) operation mode can be used
to set up a redundant LAN between the CN2600’s COM ports and the
host computer. The redundant structure involves using the CN2600’s
two LAN ports to set up two independent LANs that connect the
CN2600 to the host computer. If either of the two LANs fails, the other
LAN will continue transmitting packets between the serial devices and
the host, with the data transmitted through the CN2600. One of the
biggest advantages of using Moxa’s Redundant COM mode is that the
“switching time” is zero. What this means is that if one of the LANs
fails, data transmission between the PC host the serial devices will not
be interrupted.
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.
Host
Data A
LAN A
LAN B
Data A
Data A
Serial
Data A
Data A
Ethernet
RTU
Host
LAN A
LAN B
Data A
Data A
Serial
Data A
Ethernet
RTU
Failure
Host 1
Data A
LAN A
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