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| Background |
| Throughout the world, utility
companies are faced with growing demands on the services
they provide, as well as the need to implement more
efficient management policies of these
systems. This is perhaps most evident in municipal
wastewater treatment, where legacy systems must
be continuously upgraded, and future expansion must
be adequately planned for. Wastewater treatment plants
use various kinds of SCADA systems that typically
involve multiple operator workstations interfaced
with PLCs at the wastewater treatment plant and
remote sites. Many wastewater infrastructures
include multiple plant sites spread out over a wide
geographic area, with each site including a mixture
of in-building networks that often do not link with
other buildings and processes on-site or to other
wastewater plant sites and remote locations. |
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| Ethernet networking gives municipalities
an efficient means of upgrading legacy equipment,
and establishes a data collection and
management infrastructure to support future expansion.
Municipalities are turning to Ethernet solutions
with a high-speed fiber backbone to support their
wastewater plant infrastructure. This allows utilities
to collect all data from numerous locations within
multiple plants and make it accessible from anywhere
on the network. The ability to connect all processes
and buildings at a single site, plus link together
multiple plant sites, brings numerous benefits. |
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| EDS-726 Features 26-port Fiber Optics |
| EDS-726's multiple optical cable
support and modular switch design provide
expansion flexibility along with the large number
of ports needed for centralized control. Consequently,
cost
savings
can
be attained due to the efficiency of the units, and
the elimination of the need for media converters.
To ensure network reliability, EDS-726 can support
a redundant network architecture based on either
the industry standard 802.1W/D RTSP/STP protocol
or Moxa's
own leading-edge technology—Turbo Ring.
EDS-726 allows multiple rings to be formed and
interconnected
through ring coupling, making it possible to connect
and manage switches in remote locations while providing
both local ring redundancy and redundant connections
between rings. This makes the system more reliable
and flexible by providing an alternate data
path
when one connection becomes disabled, resulting in
fast data recovery (< 300 ms) from anywhere on
the ring structure. |
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| A Perfect Fit
for Multiple Plant Infrastructures |
| EDS-726's ability to support
a redundant fiber backbone and provide multiple,
easily configured modularized ports that provide
room for
expansion, and support for long distance fiber networking,
make it the perfect device for building a wastewater
infrastructure. With numerous PLCs monitoring
and controlling processes such as tank levels, water
flow, temperature, and PH in multiple plant sites,
EDS-726 can simultaneously network all PLC
data with large-scale control center operations.
EDS-726
makes it easier to connect these fiber-based ring
topologies with a redundant, extremely reliable,
and easy to manage system. |
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| New Capabilities Increase Efficiency |
| Long distance fiber support makes
it possible for hundreds of processes to be monitored
from anywhere on the network. For example, a central
control office in District A can monitor plant #2
in District B twenty kilometers away. As a result,
human resources can be allocated more efficiently
at certain locations due to better unmanned support
and monitoring capabilities. EDS-726's
large number of ports means reduced cabling and larger
scale device support at central control locations.
The fiber structure provides the higher bandwidth
to support future network traffic for many years
to come, plus the ability to use more bandwidth intensive
applications. |
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Benefits
of Moxa's EDS-726 |
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Multiple
ports: EDS-726 has 24+2G ports |
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Modular
design: Flexible configuration, scalable performance |
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Standard compact flash slot allows for fast and easy commissioning |
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Multiple
fiber optic ports provide electromagnetic immunity
and support extended distance connections to large,
distributed facilities and plants |
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Web based browser management |
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Ensure
fault and failure tolerance: EDS-726 allows users
to build in dual Turbo Ring support for double media
redundancy and ring coupling. |
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SNMP OPC server easily integrates network management into HMI/SCADA |
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Rugged design |
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Intelligent network management supports QoS, IGMP Snooping/GMRP, VLAN & RMON |
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Additional EDS-726 Management Features |
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| EDS-726's intelligent
management features include IGMP Snooping and
GMRP for filtering multicast traffic for industrial
Ethernet protocols and SNMP V1/V2c/V3 for different
levels of network management security. EDS-726
is easily configured over the network by web
browser, Telnet console, Compact Flash card,
or a Windows utility provided by Moxa. The Windows
utility can also be used to store and copy configuration
parameters to multiple EDS-726 units simultaneously.
In addition, EDS-726 has import, export, and
TFTP functions for convenient back up and duplication
of the configuration file. Dual redundant DC
power inputs help guarantee non-stop operation.
The backup power input will take over immediately
when the primary DC power input fails. Two relay
outputs let you configure two warning levels
to notify engineers in the field automatically
when important events occur. Two digital inputs
can be used to integrate sensors into an automatic
alarm mechanism, sending warning messages to
an IP network by email, SNMP trap, or OPC. |
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