Westermo RM-505U-2-E - Manual (Page 42)

505U Radio Telemetry Module
Page 42 © September 2002
Current Drain 120
µ
A
10mA + analogue loop
current
“Sleep” mode
Operating mode
Analogue loop supply Included 10 - 12V DC 50mA
Low Battery voltage status Monitored Can be transmitted to remote
modules
Radio Transmitter
Frequency 405 - 490 Mhz 12.5/20 kHz channel spacing
Synthesised Transmitter -
Frequency configurable range 10MHz Direct frequency modulation
Transmit power 10, 100, 500mW 250mW max. with internal
batteries (500mW with 3dB
antenna), 100mW max with 2 x AA
internal battery supply
Spurious emissions TX - <-37 dBm
Frequency Stability +/- 1.0 kHz
Expected line-of-sight range 2 km @ 10mW EIRP
5 km @ 100mW EIRP
10 km @ 500 mW EIRP Range may be extended by using up
to 5 intermediate 105U modules as
repeaters,
Antenna Connector Female BNC coaxial
Serial Ports
RS232 Port DB9 female DCE 4800 baud, no parity, 8 data bits, 1
stop bit
Data transmission
- digital inputs On change-of-state + after
update period elapsed Update time configurable 10 secs -
5 days. Separate, faster update time
may be configured when input is
ON
Data transmission
- pulse inputs Transmitted as pulse count Transmitted when count change
exceeds configured amount, or on
time elapsed since last transmission
(configurable 10 secs - 5 days)
2 pulse inputs may be
configured to a single count Suitable for quadrature or
incremental shaft encoders.