User's Manual

105 Radio/Serial Telemetry Module User Manual
Page 42 © March 2000
Chapter Five SPECIFICATIONS
General
Radio standards – 905U FCC Part 15.247 902 – 928 MHz, 1W
Housing 130 x 185 x 60mm
DIN rail mount
Powder-coated, extruded aluminium
Terminal blocks Removable Suitable for 2.5 mm
2
conductors
LED indication Power supply,
OK operation, digital I/O, RX
and TX
Operating Temperature -20 to 60 degrees C
Power Supply
Battery supply 11.3 - 15.0 VDC
AC supply 12 - 24 VAC, 50/60 Hz Overvoltage protected
DC supply 15 - 30 VDC Overvoltage and reverse voltage
protected
Mains supply 110-250 VAC via plug-pack transformer
Battery Charging circuit Included for 1.2-12 ahr sealed lead acid battery
Solar regulator Included Direct connection of solar panel (up to
30W) and solar battery (100 Ahr)
Current Drain 70 mA quiescent for ‘U’
45 mA quiescent for ‘S’
+ 10 mA/active digital input
+ 25 mA/active digital output
+ 2 x analogue I/O loop (mA)
Analogue loop supply Included 24V DC 150 mA
Mains fail status Monitored Can be transmitted to remote modules
Battery voltage Monitored As above
Radio Transceiver (905U)
Type Spread Spectrum Frequency Hopping
Frequency 902 - 928 Mhz 250 kHz channel spacing
Transmit power Fixed 1 W
Signal detect / RSSI -120 to -80 dBm
Aerial Connector Reverse SMA Coaxial
Serial Ports
RS232 Port DB9 female DCE 9600 baud, no parity, 8 data bits, 1 stop
bit
RS485 Port 2 pin terminal block 9600 baud, no parity, 8 data bits, 1 stop
bit,