GE MDS MDS iNET-II 900, Справочное руководство

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10 iNET Series Reference Manual 05-2806A01, Rev. H
antenna, one feedline, one lightning protector and ancillary hardware.
Other cost reductions come from the system as a whole, such as reduced
management requirements. And above all, the radio offers potential for
future applications that run over Ethernet and IP, such as video for
remote surveillance.
1.3.5 Wireless LAN with Mixed Services
The iNET transceiver is an excellent solution for a long-range industrial
wireless LAN. It offers several advantages over commercial solutions—
primarily improved performance over extended distances. The rugged
construction of the radio and its extended temperature range make it an
ideal solution even in harsh locations. In extreme environments, a
simple NEMA enclosure is sufficient to house the unit.
The transceiver trades higher speed for longer range. Commercial
802.11a/b/g solutions are designed to provide service to relatively small
areas such as offices, warehouses and homes. They provide high data
rates but have limited range. The iNET transmits at a higher power level,
uses a different frequency band, has higher sensitivity, and a narrower
channel to concentrate the radio energy and reach farther distances. It is
designed for industrial operation from the ground up.
IP-based devices that may be used with the transceiver include a new
breed of more powerful Remote Terminal Units (RTUs) and Program-
mable Logic Controllers (PLCs). These, as well as other devices, may
be used in applications ranging from SCADA/telemetry monitoring,
web-based video, security monitoring, and voice over IP. Figure 1-7
shows a typical wireless IP network.
Invisible place holder
Figure 1-7. Extended-Range LAN with Mixed Applications
1.3.6 Upgrading Older Wireless Network with
Serial Interfaces
Millions of wireless data products have been sold in the last two decades
for licensed and license-free operation, many of them manufactured by
NMS Control
Point
SCADA Host
Modbus/IP
Access Point
Remote Bridge
Printer
Remote Bridge
IP Camera
IP/Ethernet Device
IP/Ethernet Device
IP/Ethernet Device