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EDS-726 Industrial 26-port Gigabit Managed Redundant
Ethernet Switch
* The EDS-726 has been replaced by the EDS-728.
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Korea |
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Water Treatment Plant |
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Business Benefits |
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EDS-726 provides long distance multimode
fiber support. |
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The Dual Turbo Ring feature made configuration and management easier for: |
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Double media redundancy |
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Network node redundancy |
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EDS-726 provides more ports to connect
office devices for central control. |
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Simplified networking |
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Savings on cabling costs |
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EDS-726 modular design allows for flexible configuration and expansion. |
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Korean Water Treatment Plant Uses
Moxa's EDS-726 to Upgrade Monitoring and Control |
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Introduction |
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Clean water is an important part of every community in the world. As communities grow, most water treatment plants scale their processes to collect and process water to meet the added demands of the area. Water treatment plants can be very large in size, and usually include land for storage tanks, processes, sediment ponds, maintenance buildings and more. Water is collected from multiple wells, reservoirs and rivers, and then pumped to the water treatment plant, where it is treated and then delivered to customers. To monitor and control processes, utilities have traditionally relied on proprietary communication protocols, so the costs of installation, maintenance, and replacement of spare parts can be high. |
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System Description |
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The Aha Sa water plant in Korea, a major
water treatment facility that has supported the local area's
population and industrial growth for the last twenty years,
recently upgraded its monitoring and control SCADA system
using Moxa's EDS-726, a 26-fiber port modular Ethernet
switch, to support a fiber-based Ethernet network infrastructure
with a dual turbo ring redundant fiber backbone. The plant
treats nearly all of the water used in the district using
workstations interfaced with proprietary PLC control equipment
to control pumps, valves, and other equipment that moves
the water through the various treatment processes. The
Aha Sa water plant was looking to upgrade their network
infrastructure utilizing state-of-the-art Ethernet technology
that was readily available, cost effective to integrate,
and could help collect data from numerous locations throughout
the plant. An added benefit included Ethernet's ability
to support future upgrades and expansion seamlessly. |
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The Aha Sa plant chose the EDS-726 26-port
managed gigabit Ethernet switch because it provided multiple,
easily-configured, modularized ports that support multimode
fiber for the long distances necessary to cover the entire
plant site. Furthermore, the switch offered excellent reliability
via self-healing network recovery in less than 300 ms from
broken LAN connections. EDS-726 can handle all PLC
data collection needs as well as central control and administrative
support, effectively reducing cabling with a more efficient
ring topology. The double media ring together with redundant
node configurations for all critical processes significantly
reduced possible system downtime and strengthened disaster
recovery. EDS-726 allowed the Aha Sa plant to move
away from their proprietary protocols, lower component
and maintenance costs, and add the gigabit bandwidth necessary
for additional monitoring and communications, such as video
and voice. The fiber backbone was also more resistant to
electromagnetic interference and transient voltages caused
by the harsh weather conditions the plant sometimes experienced. |
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Better Response and Control |
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After the upgrade, operators could easily check the status
of all processes from anywhere on the network. The ability
to monitor storage tanks, levels and flow rates in wells
and reservoirs and quickly open or close valves during
changes in demand, allows the plant to adjust
flow more efficiently to city water lines and maintain
a more stable system. It is easier to determine the cause
and
location
of malfunctions
and includes automatic notifications to operators and system
controllers for alarm events. The system has simplified
decision making by automating many processes like refilling
multiple storage sites that were previously hard to monitor
and control. The new system also allows the plant to store
the results of sampling, schedules and maintenance activities
more easily,
plus help supply data to generate the diagnostic
reports that are essential to any water treatment facility. |
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