GE MDS Mercury 900, Справочное руководство

Страница: 22 / 211

05-4446A01, Rev. E Mercury Reference Manual 13
rower channel to concentrate the radio energy, reaching farther dis-
tances. It is designed for industrial operation from the ground up.
IP-based devices that may be used with the transceiver include new,
powerful Remote Terminal Units (RTUs) and Programmable 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 1-9 shows a typ-
ical wireless IP network.
Invisible place holder
Figure 1-9. Extended-Range LAN with Mixed Applications
1.3.7 Upgrading Older Wireless Network with Serial
Interfaces
Millions of wireless data products have been installed in the last two
decades for licensed and license-free operation, many of them manufac-
tured by GE MDS. There are several ways that these systems can benefit
from incorporating Mercury equipment. The chief advantages are inter-
face flexibility (serial and Ethernet in one unit), and higher data
throughput. By taking advantage of its built-in serial and Ethernet inter-
faces, the transceiver is well suited to replace leased lines, dial-up lines,
or existing “multiple address” data transceivers.
Replacing Legacy Wireless Products
In most cases, legacy radio transceivers supporting serial-interface
equipment can be replaced with Mercury transceivers. Legacy equip-
ment can be connected to the transceiver through the
COM1
port with a
DB-25 to DB-9 cable wired for EIA-232 signaling. The
COM1
port acts
as a Data Communications Equipment (DCE) port.
NMS Control
Point
SCADA Host
Modbus/IP
Access Point
Remote Bridge
Printer
IP/Ethernet
IP/Ethernet
Remote Bridge
IP/Ethernet
IP Camera