New integrated radio modules for long range wireless remote control
Circuit Design, Inc. has announced the release of the CDT-TX-02M-R / CDT-RX-02M-R, an embedded low power radio transmitter and receiver suitable for long-range On/Off remote control.
The modules incorporate highly reliable radio components and input and output
processing circuitry, enabling simple communication with up to six contacts.
MSK modulation and high receiver sensitivity (-120 dBm 12 dB SINAD) ensures
good noise immunity and stable communication, while the battery operable
10
mW transmitter has a line-of-sight range over 1 km.
You can select from four preprogrammed frequencies using the onboard DIP
switches, allowing simultaneous use in the same area. The frequencies take
third-order intermodulation into account and are programmed to have little
impact on each other.
Each transmitter module has a specific 32-bit ID to prevent errors caused by
receiving signals from other transmitters operating on the same frequency. The
safety of this system is amply demonstrated by Circuit Design’s remote control
units where this system is being used in more than 1 million units.
A total of up to 100 transmitter IDs can be registered in the receiver. This
ensures that control of the receiver from multiple transmitters, or control of
multiple receivers from one transmitter can be performed without any concern
about malfunction.
The interface for the output port of the receiver uses photo MOSFET, enabling
direct drive with loading of up to AC/DC48 V/100 mA. In addition, you can select
from four operation modes (continuous, toggle, switching, and one shot)
depending on the requirements. In the continuous mode, the output port is active
while the unit is receiving a signal from the transmitter. In the other modes,
the status of the output port being controlled can be changed according to the
mode setting when the unit receives momentary signals from the transmitter. When
output from the transmitter is of short duration, the impact on other equipment
using the same frequency can be minimized. The radio waves are used more
efficiently and the transmitter consumes less power.
The technical features and applications ofCDT-TX-02M-R / CDT-RX-02M-R are as
follows.
Technical features
- Stable operation with MSK (FM) narrow band radio transmission 25 kHz
span
- Long distance communication (1 km line of sight) thanks to high receiver
sensitivity of -120 dBm and MSK modulation
- Transmitter output 10 mW, standby current less than 1 uA
- 6 switch inputs and outputs
- Direct drive is possible with relay loading etc. (Max. AC/DC48 V/100 mA)
- Select from 4 operation modes (continuous, toggle, switching, and one
shot) depending on the requirements
- The receiver is equipped with a SAW filter with sharp filtering
characteristics to prevent radio interference
- All units have a unique 32-bit ID
Main specifications
- Relevant standard EN300220
- Frequency band 434 MHz
- Number of channels 4 fixed channels
- Output 10 mW
- Operating temperature range -20 to +60°C
- Operating voltage Transmitter 2.2 V to 12 V Receiver 3.0 V to 12 V
- Operating current Transmitter 27 mA Receiver 16 mA (when off) 50 mA
(when on)
- Size Transmitter 36 × 26 × 8 mm Receiver 53 × 35 × 12 mm (excluding
protrusions)
Applications
- Transmission of a variety of switch signals
- Remote control of industrial equipment
- Emergency stopping devices, revolving lights, and various kinds of
warning devices
- Control of traffic signals at building sites and factories
- Summoning devices for shopping centres, restaurants etc.
- Remote sensing and monitoring devices
Unit price
Samples Transmitter 10,000 yen Receiver
20,000 yen
More info -
Circuit Design, Inc.
20111005045.10.2011TelecommunicationCIRCUIT DESIGN, INC.