The RFI 9256 is a license free high performance data radio capable of functioning
in hostile
RF environments with data throughput of 115 Kbps.
Receiver design provides superior rejection of unwanted signals in hostile crowded
spectrum environments.
Features
• Economical
• Dual RS-232 ports (one for the data equipment, the
other for a PC to set up the modem & monitoring the network)
• Suitable for voice and data
• Forward error correction
• ARQ is software selectable (Automatic Repeat reQuest:
the receiving station requests retransmission if an error)
• Air data speeds 115 Kbps
• In built diagnostic channel
• Up to 30 Kms point to point
• User friendly intuitive software
• Interface speeds 110 to 115000 bps
• RF power up to 1 Watt software selectable
• Programmable I/O for SCADA applications
• Front panel indicators for RSSI, TX power and status (RSSI=Received
Signal Strength Intensity)
• Can be installed and commissioned without test equipment
Applications
Point to Multipoint Data Acquisition and Control
Intelligent built in Modem can interface with virtually any standard Data logger,
PLC, computer; i.e. any RS232
device. In built buffers handshake with Input/output devices at data speeds
up to 115,000 bps and transparently
move data to the other end.
Linking of local and remote RS232 serial ports
Depending upon the geography and terrain, the Radio modems can communicate reliably
over considerable
distances. Good line of site paths from mountain top to hill can extend useful
range up to 30 km.
The RFI 9256 can be used as a repeater to extend range indefinitely.
Parallel digital I/O and expansion
8 parallel digital I/O in addition to the standard RS232 serial port, are provided
in the RFI 9256 Radio modems.
Expansion radio interface modules (RIM) permit very large SCADA capability.
For more details regarding interface parameters, please enquire.
Diagnostics functions
The second RS 232 port can be used as a diagnostics channel for monitoring network
performance, and for
additional data routing if required.
Specifications
RFI 9256 Series 3PHYSICAL
Dimensions 190mm L x 80mm W x 35mm H
Weight 260 grams
Construction Alodined aluminium chassis and cover, with integrated display
GENERAL
Operating voltage 9 to 16VDC negative ground
Operating current
Standby mode 150 mA
Transmit mode (1Watt) Averages 350mA
Operating temperature range -10 to +60 deg C
Operating Humidity range Up to 95% non-condensing RH @ 50 deg C
Parameter and mode settings In built software
TRANSMITTER
Output Power 1mW to 1 Watt software selectable
Spurious emissions <-60 dBc
Output protection Transmitter is fully protected for any load @ full power @
60 deg C
RECEIVER
Sensitivity <-108dBm for BER 1 part in 10^-4
End to end performance Better than 1 in 10^-6 BER for S/N 20 dB or better
Frequency range 915–928 MHz (Australia) 902–928 MHz (FCC) 921-929
MHz (NZ)
RSSI display range -110 to -60 dBm in 5 dB steps
DATA SYSTEM
RS 232 handshaking Hardware/ software/ none software selectable
Protocol modes All common variants / PLCs supported including
point / point, point / multipoint and Hayes modes
Interface data speed 110 to 115,000 bps, software selectable all modes