Total Solutions for Industrial Device Networking
1-21
www.moxa.com e-mail: info@moxanet.com
EDS-508A/505A Series
PLC
LAN
PLC
IP
New Device
• Email
• SNMP
• OPC
Warning Notication
Normal
Trafc
Normal
Trafc
Mirrored Trafc
Switch Events Port Events
Cold Start Warm Start Link On
Power On/Off Authentication failure Link Off
Topology Change Conguration Change Trafc Overload
1
Managed Ethernet Switch
Since industrial Ethernet devices are often located at the
endpoints of a system, such devices cannot 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 of
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:
IEEE 802.1X enhances user authentication
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. EDS-508A/505A
series’ mirroring port function helps to ensure that the system
behaves as expected.
Warning by e-mail
The EDS-508A/505A series can send out a warning e-mail
when an exception is detected, providing system managers
with real-time alarm messages.
Warning by Relay Output
The EDS-508A/505A series provides two relay outputs that can
be set up to indicate events with different importance to notify
or warn engineers in the field, so the engineer 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-508A/505A series can
integrate sensors into its automatic alarm mechanism, by
redirecting warning messages to an IP network by e-mail,
SNMP trap, or OPC.
To reduce the effort required to configure IP addresses
repeatedly, the EDS-508A/505A series comes equipped with
DHCP/BootP server and RARP protocol to set up IP addresses
of Ethernet-enabled devices automatically.
Port Mirroring for Online Monitoring
Automatic Warning by Event
Replace Faulty Devices
(16 paginas)
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