C-1
The OMWT-REC232 is a 418 MHz
radio receiver designed to receive
and decode packet data from all
OMWT Series wireless transmitters.
The OMWT-REC232 decodes the
CRC-16 encoded packets and
translates them to ASCII strings that
are sent out the RS-232 serial port
to the PC at 19200 Baud. No
hardware handshaking or command
protocol is required; all data packets
are decoded and transmitted
serially as they are received. The
OMWT-REC232 is very low power;
most RS-232 ports provide enough
power to operate the receiver.
External power input is provided for
host serial ports that cannot provide
the necessary current. A simple
design approach results in a low
cost receiver that provides error
checked ASCII data for all OMWT
series wireless transmitters.
The OMWT-REC232 is supported
by the OMWT-SOFT Windows
software. This makes connecting all
OMWT Series wireless transmitters
to your PC easy.
⻬ High Performance
418 MHz Receiver
⻬ Serial Connection
Directly to PC
⻬ Powered by RS-232
Port or External Source
⻬ ASCII Radio Packet
Data Output
⻬ Decodes CRC-16 Error
Encoded Radio Packets
⻬ Up to 180 m
(600') Range
⻬ Receives Data from up
to 100 OMWT Series
Wireless Transmitters
$
222
Basic Unit
Wireless Receiver
with RS-232 Interface
OMWT-REC232
Software
The OWMT-SOFT Windows
software shows trends, minimum
and maximum values and also
indicates alarms. All data collected
may be viewed graphically in real
time or as a historical display.
ASCII data logging to a file is also
available to allow import into other
programs such as spreadsheets
and data base programs. OPC
(OMWT-SOFT-OPC) and DDE
(OMWT-SOFT-DDE) server
software is also included.
OWMT-SOFT can be used to
collect data from a wireless
network. Currently supported
sensors include:
OMWT-TEMP15 Temperature
OMWT-TEMPRH Humidity
OMWT-AIN5V Analog 5 Volt
OMWT-AIN10V Analog 10 Volt
OMWT-AIN20MA Analog 20 MA
OMWT-VIB Vibration
OMWT-MOT Motion
OWMT-SOFT is actually a DDE client
application that works in concert with
the included DDE server application
called OWMT-SOFT-DDE.
OWMT-SOFT-DDE handles the
details of communicating or receiving
data from the wireless sensors.
OWMT-SOFT-DDE verifies that the
communication is correct, processes
the sensor samples and then
forwards the data to the DDE client.
The OWMT-SOFT Windows software
is responsible for the presentation
and analysis of the collected data.
The OMWT-SOFT Windows
software can receive data from up
to 100 of the OMWT Series wireless
sensors, however it can only display
data from up to six sensors at a
time. If more than six sensors need
to be displayed at any given time
then the included OPC or DDE
server software can be used to
transfer data to other third party
SCADA software packages.
OMWT-REC232,
$222, shown
smaller than
actual size
OMWT-SOFT, $100, displays
real-time historical chart or
numerical data
C-2
C
Specifications
Supply Voltage: 5.0 Vdc min,
12 Vdc typical, 16 Vdc max
Supply Current: 18 mA min,
20 mA typical, 25 mA max
Transmission Range: 180 m (600')
Transmission Frequency: 418 MHz
To Order
(Specify Model Number)
Model No. Price Description
OMWT-REC232 $222 Wireless receiver with RS-232 interface
OMWT-SOFT 100 OMWT Series Windows software
CS-3780 20 Reference Book: Starting Electronics
Each unit comes with complete operator’s manual.
OMWT-REC232 wireless receiver is supplied with 1.8 m (6') RS-232 cable
with DB9F connection to PC and 110 Vac adaptor.
Ordering Example: OMWT-REC232 wireless receiver and OMWT-SOFT Windows software,
$222 + 100 = $322.
Baud Rate: 19200
Operating Temperature: -40 to 85°C (-40 to 185°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Humidity: 10 to 90% RH non-condensing
Dimensions (with antenna): 57 H x 79 W x 57 mm D
(2.25 x 3.125 x 2.25")
Weight: 85 g (3 oz)
AVAILABLE FOR FAST DELIVERY!
OMWT-SOFT, $100
OMWT-REC232,
$222, shown
smaller than
actual size
As many as 100 transmitters can be used
PC Running OMWT-SOFT
Windows Software
(Laptop not included)
serial cable
OMWT-MOT, $145, Series
Wireless Transmitter
OMWT-AIN5V, $156, Series
Wireless Transmitter
OMWT-TEMPPRH, $200, Series
Wireless Transmitter
OMWT-REC232 418
MHz Receiver, $222
OMWT Series wireless transmiters can send
data up to 600 ft to the OMWT-REC232
receiver. This receiver communicates with
the PC via RS-232 communications.
OMWT Series Wireless Transmitters with Receiver
Low Power 418 MHz System
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