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Synetcom's 1 Watt Serial SCADA Radio Modem can be used
to link SCADA
devices such as PLCs. The radio delivers
transparent error-free serial data in adverse
industrial environments, even with other in band
interference (other nearby spread spectrum
radios).
Simpler SCADA systems are
easily constructed without PLC and RTU devices
by connecting the 1 Watt SCADA Radio Modem to Synetcom's
Radio Telemetry I/O Expander module.
The combination creates high I/O count 4-20 mA current loop,
discrete and relay connections between sites
without cables, PLCs (and associated PLC
programming expenses). As few as one I/O
point between a pair of locations can be easily
and incrementally expanded to many I/O points
between many locations. Only one 1 Watt SCADA
Radio Modem is required at each site. No
programming is required.
The Serial SCADA Radio Modems are shipped factory-configured and tested.
There is no field configuration necessary. Typical
installation involves simply mounting and powering
the units and connecting the antennas and serial
ports.
The 1 Watt 900 MHz Radio Modem utilizes frequency
hopping spread spectrum with advanced protocols
that greatly increase the communications reliability
in high noise and interference environments.
Modbus interfaces are compatible with higher
speed (>9,600 baud) Radio Modem versions. Point
to point or point to multipoint communication
between Modbus host and field PLC or RTU remotes
is supported with one serial Radio Modem at each
location.
Radio Modem repeaters are used wherever either distance
or major obstructions cause the radio signals
to be weak. In large facilities, the repeater is
typically located at the highest point so that
coverage is obtained everywhere. The
control room only needs radio coverage to the
repeater, greatly simplifying installation and
guaranteeing low data latency - unlike meshed
systems which can have very high latency.
The repeater consists of a pair of 1 Watt SCADA Radio modems
in a null data connection. Data is processed through
the Repeater
in digital form so sensor reading accuracy is
never affected.
Synetcom offers a complete line of accessories
and system enhancements including:
- Antennas and coaxial cable for short and
long distance applications
- Lightning and external surge / loop
isolation equipment
- NEMA plastic and metal enclosures with
internal DIN rail mounts - designed to house the
radio, power supply and other options
- Solar panel, battery, radio enclosure
optimized for installations where AC power is
not available.
Transmission
Range: Synetcom specifies a
40 mile (900 MHz 1 Watt) range that includes a 20 dB margin (if the
signal fades as much as 20 dB - a factor of
1/100 - the link continues to operate). Obstructions in the line of sight path
reduces range, depending on the type of
obstruction. Contact our factory for
assistance.
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Radio Modem Choices:
o For short range (<1000')
indoor or outdoor applications, our
lower
cost 900 MHz serial radio modem is
recommendedo If the link is obstructed or must be secure, or if long
range is needed at 900 MHz, choose the 256
bit AES encrypted 1 watt 900 MHz serial
data radio modem (40
miles). |
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