Device Servers offer simultaneous dual-LAN redundancy.
May 13, 2008 -
Combining 1 or 2 RS-232/422/485 serial ports with 2 x Ethernet ports, Models EKI-1521 and EKI-1522 create redundant environment in which users can establish 2 physical networks, 1 for primary connection and another as backup host that can connect to servers directly when primary connection fails. Each COM port provides 921 Kbaud technology with throughput up to 1.2 Mbps. Both servers include built-in dual-power inputs from 12-48 Vdc, with power fail relay output to detect power operation status.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Advantech Automation Corp.
1320 Kemper Meadow Dr., Suite 500
Cincinnati, OH, 45240
USA
Powerful & Highly Reliable Serial Device Servers Now Available from Advantech
The Industrial Automation Group of Advantech introduces the powerful EKI-1521 and EKI-1522 Serial Device Servers, which combine rugged, compact and fast 1 or 2 x RS-232/422/485 serial ports with 2 x Ethernet ports. This unique design allows the EKI-1521 and EKI-1522 to create a reliable redundant environment, providing the fastest and most reliable Serial Device Servers available in the industrial market. Furthermore, each high-speed COM port provides 921K-baud technology with a throughput up to 1.2 Mbps, which fulfills high data transmission needs. EKI-1521 and EKI-1522 also has built-in dual-power inputs (DC 12-48V) with 1 power fail relay output to detect power operation status and ensure the device works normally.
With 2 x Ethernet ports packed into the professional EKI casing, highly reliable Ethernet redundancy is realized. This means that through the EKI-1521 and EKI-1522, users can establish 2 physical networks, one for the primary connection, and the other is a backup host that can connect to the device servers directly when the primary connection fails. Furthermore, the 2 Ethernet ports can be set to two different networking domains to support various network applications.
Simultaneous Dual-LAN Redundancy
An exclusive new feature for Advantech's Serial Device Servers is support for simultaneous connection redundancy. In this case, both LAN's are connected to multiple hosts (Max 5) and if either of the two connections fail, the other LAN will continue the communications between the Serial Devices and the Hosts.
Ethernet Redundancy
Advanced Multi-Access Functionality
EKI-1521 and EKI-1522 combines various operations; such as COM port redirection, TCP server/client and UDP mode to fulfill advanced needs. EKI-1000 series also supports Multi-Access functionality to provide 5 host connections for each serial port with broadcast and polling operations. In Broadcast Mode, EKI Serial Device Servers handle a command from one application and reply to the data from the serial port to all applications connected to this serial port.
Broadcast Mode
In Polling Mode; EKI Serial Device Servers handle the commands from one application and reply to this applicAation only. Query from other applications must be queued and wait for current process completion.
Polling Mode
The EKI-1521 and EKI-1522 are now available for ordering. Contact your local Advantech sales representative, or Advantech directly to learn more.
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