Overview

Fast Ethernet Redundant Ring Capability (< 300 ms)

For industrial automation applications, redundancy is always an important issue to help increase the reliability of your system. MOXA EtherDevice™ Redundant Switch EDS-508 comes equipped with a redundant network protocol called Turbo Ring that was developed by Moxa. Turbo Ring gives users an easy way to establish a redundant Ethernet network, and with its ultra high-speed recovery time, once any segment of your network is disconnected, your automation system will be back to normal in less than 300 ms.

Couple several Turbo Rings for distributed applications

For some systems, it may not be convenient to connect all devices in the system to create a BIG redundant ring, since some devices could be located at a remote site. Turbo Ring's "Ring Coupling" function helps you separate those distributed devices into different smaller redundant rings, but in such a way that they can still communicate with each other.

IGMP Snooping for filtering multicast traffic

IGMP (Internet Group Management Protocol) is important in industrial networking, and may be used over Ethernet with some field bus protocols, such as Allen-Bradley EtherNet/IP, Siemens Profibus, and Foundation Fieldbus HSE (High Speed Ethernet). These industrial Ethernet protocols use publisher/subscriber communications models to multicast packets that could flood a network with heavy traffic. IGMP Snooping provides the ability to prune multicast traffic so that it travels only to those end destinations that require this kind of traffic, and consequently reduces the amount of traffic on the Ethernet LAN.

VLAN eases network planning

A VLAN is a group of devices that can be located anywhere on a network, but which communicate as if they are on the same physical segment. VLANs can be used to segment your network without being restricted by physical connections—a limitation imposed by traditional network design. Besides, since all automation systems incorporate sensitive devices that must be protected from unauthorized access, it is very important to have some type of authentication system set up that only allows authorized users to access the system. If devices belong to different VLANs, they cannot communicate with each other, providing extra security and protection from unwanted invastion, or traffic. The IEEE 802.1Q standard and GVRP protocol can exchange the same interoperable parameters to keep consistent VLAN settings over the entire network.

QoS increases determinism

Quality of Service (QoS) provides a traffic prioritization capability to ensure that important data is delivered consistently and predictably. EDS-508 Series can inspect IEEE 802.1p/1Q layer 2 CoS tags, and even layer 3 TOS information, to provide a consistent classification of the entire network. EDS-508 Series' QoS capability improves your industrial network's performance and determinism for mission critical applications.

Rate Limiting prevents unpredictable network status

Any single device on a network should not be given unlimited bandwidth, particularly when it malfunctions. The most well-known problem is the broadcast storms caused by setting up the wrong topology, or by devices that malfunction. The EDS-508 Series not only can prevent broadcast storms, but also can configure the ingress/egress rate of unicast/multicast/broadcast packets, and in this way give administrators full control of limited bandwidth to prevent unpredicatable faults.

Port Lock to allow authorized access by specific MAC addresses

The EDS-508 Series can assign protected static MAC addresses to specific ports. By using the Port Lock function, locked ports will not be able to learn other addresses but only allow the traffic that comes from the preset static MAC address, helping to block unwanted invasion and usage.

Port Mirroring for online monitoring

In some cases, a network is so large that it is difficult to achieve the expected level of communications. Industrial communications applications use more of a command-response style than the file-transfer style used in office network environments. This means that when first setting up an industrial Ethernet network, control engineers may need to use a second port to monitor the actual activity betwen their devices and computer host. EDS-508 Series' mirroring port function helps to ensure that the system behaves as expected.

Automatic warning by event

Since industrial Ethernet devices are often located at the endpoints of a system, such devices cannto always know what's happening elsewhere on the network. This means that industrial Ethernet switches that connect these devices must take responsibility for providing system maintainers with real-time alarm messages. Even when control engineers are out fo the control room for an extended period of time, they can still be informed of the status of devices almost instantaneously when exceptions occur.

The traditional way of determining device status is to poll devices periodically, but this is not "real-time" enough, and is not very efficient. Warning messages must be actively triggered by events. To take care of these requirements, industrial Ethernet Switches need features such as:

• Warning by e-mail
  The EDS-508 Series can send out a warning e-mail when an exception is detected, providing system managers with real-time alarm messages.
  
  

  Switch Events		Port Events
  Cold Start	Warm Start	Link On
  Power On/Off	Authentication Failure	Link Off
  Topology Change	Configuration Change	Traffic Overload

   

• Warning by relay output
  The EDS-508 Series provides two relay outputs that can be set up to indicate events with different importance to warn engineers in the field, so that engineers can use the appropriate emergency maintenance procedures to respond quickly to higher priority messages.
  
  

• DI to integrate other important sensors
  With two digital inputs, the EDS-508 Series can integrate sensors into its automatic alarm mechanism, turning warning messages into IP network by e-mail SNMP trap, or OPC.
  
  

Replace Faulty Devices

To reduce the effort required to repeatedly configure IP addresses, the EDS-508 Series comes equipped with DHCP/BootP server and RARP protocol to automatically set up IP addresses of Ethernet-enabled devices.

Line Swap Fast Recovery

Commercial Ethernet switches need 3 to 5 minutes of recovery time when networked devices change position. But since a recovery time of even 3 minutes is an absolute eternity for industrial applications, Moxa's patented Line-swap fast recovery feature—which responds in less than 1 second—was developed to keep your communication line open longer.

Easy Browser-based Configuration

The EDS-508 Series is easily configured over the network by web browser, Telnet console, or a Moxa provided Windows utility. In addition, Moxa's Batch Configurator can also be used to store and copy configuration parameters to multiple EDS-508 units simultaneously.

Network Management with SNMP-OPC Server

The SNMP OPC Server software package can convert SNMP into OPC format. The vertical integration of SNMP-Management information into existing OPC-based SCADA packages gives the customer the ability to establish an Ethernet Network Management Application that is integrated with existing Visualization and Control applications.

Features

Dimensions, unit = mm