|
|
|
|
The 805U module may be powered from either a 7 - 30 VDC or 10 - 24 VAC supply
Normal current drain 70mA (@12VDC) or 50mA (@24VDC)
Current when transmitting 350mA (@ 12V), 250mA (@ 24V).
Low power mode, normal current drain is 20mA (@ 12VDC), 15mA (@24VDC)
Environmental -30 to 60 degC (full performance), -40 to 70 degC (typical performance)
0 to 99 %RH
EMC Compliant ETS 300 683
Housing, extruded aluminium case 130 x 185 x 60 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).
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.
The following characters are supported (selectable) - 7 data bits, even or odd parity,1 start bit,1 or 2 stop bits; 7 data bits, no parity,1 start bit, 2 stop bits; 8 data bits, even or odd or no parity, 1 start bit,1 stop bit
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.
Terminal connectors provided for RS485.
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 five intermediate repeaters for controlled mode
- unlimited repeaters for transparent mode
Conforms to EN 300 220
Antenna connection is SMA coaxial
Transparent mode: Data is transmitted as a 520 byte packet with a system address.
Data transmission begins as soon as serial data is received.
For RS232, DCD signal is always high, and CTS is high while there is space in the input buffer.
All modules, with correct system address, which receive the data packets, output the data without error checking.
Controlled mode: Data is transmitted in packets with a system address, source address, destination address, up to five 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 before resetting the DCD output.
For RS232, the CTS signal is high if there is room in the input buffer.
Destination and repeater addresses may be configured by host using Hayes AT commands.
|
|
|
|
|
|
|
|
|
|
|
