C-1
Wireless Transceiver
with RS-232 Interface
OMWT-XREC-SER-900
⻬ Built-in 900 MHz
Frequency Hopping
Radio for Long-Range
Wireless Interface
⻬ Receives Data from
OMWT-REP Wireless
Repeater,
Data Can be Displayed
and Logged Using
OMWT-SOFT Software
⻬ Can Also be
Used as a General
Purpose Radio Modem
in SCADA Applications
$
382
Basic Unit
The OMWT-XREC-SER Wireless
Transceiver is a general purpose
compact data transceiver perfect
for those needing high performance
and dependable operation. Its
wireless modem transfers data
at 9600 baud up to 1/4 mile in a
city environment with 1/2 wave
antenna or greater than 10 miles
line-of-sight with a YAGI directional
antenna.
It is ideally suited for applications
in supervisory control and data
acquisition (SCADA), remote meter
reading, home automation, security,
instrument monitoring, point of sale
systems (POS) and myriad other
applications.
Transceiver modules have built-in
support for multi-drop networking
protocols. Multiple independent
networks can operate in the same
vicinity by using distinct network
identifiers.
The radios integrate quickly and
seamlessly into any new or existing
design. Simply output serial data
from a micro-controller or RS-232
port into the radio to send FCC
approved, frequency hopping
spread spectrum data through the
air and capture it on all receivers
within range on the same network.
The system behaves as a virtual
half-duplex parallel-wired network.
The OMWT-XREC-SER-900
wireless transmitter is supplied
standard with a 1/2 wave monopole
antenna. For longer distance
outdoor use, optional Omni-
Directional and YAGI directional
line-of-site antennas are available.
Specifications
Frequency Range:
900 MHz unlicensed ISM band
Type: frequency hopping
spread spectrum transceiver
Frequency Control: Direct FM
Transport Protocol: Various
monitoring and addressing modes
Channel Capacity: Hops through
25 channels, 7 different hop
sequences and 65,000 network
identifiers
Serial Data Interface:
Asynchronous CMOS (TTL)
signals, 5 V levels
Serial Interface Baud Rate
(from serial port on transceiver
to host computer): Configurable
from 2400 to 57600 baud
Data Throughput (radio to radio):
9600 baud
Network Topology:
Point–multipoint, point-to-point
multi-drop via transparent
networking
Channel Data Rate:
10K bps at 9600 baud (the half-
duplex transmission of the
OMWT-XREC-SER can sustain
a continuous data stream at 9600
baud data rate)
Transmit Power Output: 100 mW
Rx Sensitivity: -110 dBm
Transceiver Range Indoor
(with standard 1/2 wave
monopole antenna):
180 to 396 m (600 to 1300'),
900 MHz
Transceiver Range Outdoor
(with optional Omni-Directional
Antenna):
Up to 7 mi (11 km), 900 MHz
Transceiver Range Outdoor
(with optional YAGI antenna):
Up to 20 mi (32 km), 900 MHz
Interface Rejection: 70 dB
at pager and cellular phone
frequencies
Power: 6 to 24 Vdc, 200 mA
Operating Temperature:
0 to 70°C (32 to 158°F)
Storage Temperature:
0 to 70°C (32 to 158°F)
Humidity: 10 to 90% RH
non-condensing
Dimensions (without antenna):
70 H x 127 W x 35 mm D
(2.75 x 5.00 x 1.375")
Weight: 142 g (5 oz)
OMWT-XREC-SER-900, $382,
shown smaller than actual size