Specifications

Industrial Networking Solutions
3-11
[e-mail]
www.moxa.com
3
Industrial Ethernet Switches >
Introduction to Managed Ethernet Switches
Moxa’s managed Ethernet switches (not including the EDS-400A) can
use the Port Lock function to assign protected static MAC addresses to
specific ports. Locked ports will not be able to learn other addresses,
but only allow traffic that comes from the preset static MAC address,
helping block unwanted invasion and usage.
Port Lock Limits Access by MAC Address
Device without authorized MAC address
Device with authorized MAC address
Normal
Traffic
Normal
Traffic
Mirrored Traffic
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 between
their devices and computer host. The mirroring port function on
Moxa’s managed Ethernet switches helps ensure that the system
behaves as expected.
Port Mirroring for Online Monitoring
PLC
LAN
PLC
Switch Events Port Events
Cold Start Warm Start Link On
Power On/Off Authentication Failure Link Off
Topology Change Configuration Change Traffic Overload
Since industrial Ethernet devices are often located at remote parts of a
network, it may be hard for system administrators to keep track of the
status of such devices. The traditional method used to determine the
status of devices is to poll devices periodically, but this is not “real-
time” enough for many modern applications, and also wastes precious
computing resources. A more modern solution to this problem is to
Automatic Warning by Event
Warning Notification
e-mail
Warning by e-mail
Moxa’s managed Ethernet switches send out a warning e-mail when an
exception is detected, providing system managers with real-time alarm
messages.
Warning by Relay Output
The managed Ethernet switches provide relay outputs that can be
configured to indicate the importance of events when notifying or
warning engineers in the field. In response, engineers can respond
quickly and with the appropriate emergency maintenance procedures
to higher priority messages.
DI for Integrating Other Important Sensors
Moxa’s managed Ethernet switches (not including the EDS-400A or
IKS series switches) have two digital inputs for integrating sensors
into the Ethernet switches’ automatic alarm mechanism. This is
done by redirecting warning messages to an IP network by e-mail
notification.
e-mail
use industrial Ethernet switches that provide system maintainers with
real-time alarm messages almost instantaneously when exceptions
occur. In other words, warning messages are triggered actively when
the events occur. In order to handle these requirements, industrial
Ethernet switches need a number of important features, as described
below.