Power Supply
• 10 - 30 VDC or 10 - 24 VAC supply
• Normal current drain 70mA/12VDC or 50mA/24VDC
• Current when transmitting 350mA/12V or 250mA/ 24V
• Low power mode current drain 20mA/12VDC or 15mA/24VDC
General
• Environmental -40 to 60 degC, 0 to 99 %RH
• EMC Compliant ETS 300 683
• Housing, extruded aluminium case 114 x 185 x 30 mm DIN
rail mounting, removable terminal blocks for ease of module
replacement, terminals suitable for 2.5sqmm conductors.
• LED indication for unit OK, radio TX and RX, serial TX and RX,
DCD (comms OK).
Serial Port
• Standard data rates 1200 to 115200 baud.
• RS232 and RS485 standard interface connections provided,
each connected to the same serial port. Serial interfaces are
asynchronous non-return-zero (NRZ) format.
• Characters supported 7 or 8 data bits, even/odd/no parity,
1 or 2 stop bits
• RS232 connection provides full duplex operation as a DCE
device with RTS/CTS hardware handshaking- standard D9
connector.
• RS485 connection provides half duplex operation for twisted-
pair multidrop networks.
• Input and output buers 2Kbyte
Radio Transceiver
• Single channel, synthesised transceiver
• Frequency 869.4 - 869.65 MHz, 250KHz channel
• Transmit Power 500mW
• RSSI -60 to -120 dBm
• Expected line-of-sight range, 5 km at 19200 bits/sec
• RF Data Transmission Rate - 19200 baud, 38400 baud,
76800 baud
• Range may be extended by:-
- up to ve intermediate repeaters for controlled mode
- inlimited repeaters for transparent mode
• Conforms to EN 300 220
• Antenna connection is SMA coaxial
Data Transmission
• Transparent mode: Data is transmitted with a system and
group address. Data transmission begins as serial data is
received – maximum packet size is 530 bytes. All modules,
with correct system address, which receive the data packets,
outputs the data - error checking is optional.
• Controlled mode: Data is transmitted in packets with a
system address, source address, destination address, up to
ve intermediate repeater addresses, and a 16 bit CRC error
check. If the packet is received with a correct error check,
only the destination module will output the data and will
also return an ACK transmission.
If the source module does not receive the ACK, it will retry a
further four times. DCD provides communications status.
• Auto-connect and dial-up-control modes are available.
• CTS/RTS ow control provided based on input buer
availability.
Conguration and Diagnostics
AT commands. Radio noise, signal strength and bit error
rate (BER) diagnostics included. Radio signal strength value
available on-line to host device.
Elpro 805U
Specications
Wireless Solutions for Process Applications
ELPRO
Technologies
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