- Overview
- Details
- Documents
- Dev. tools
- Accessories
- Applications
- Case study
- FAQ
- Sales Network
Product discontinued.
For new projects, please use replacement model available in 2022.
CDT-TX-02M-R and CDT-RX-02M-R are CE certified radio modules operating in the 434 MHz ISM band. In addition to the high performance narrow band FM (MSK) radio unit, the modules include switch signal input / output processing circuits allowing switch signals to be transmitted and received without the addition of external circuits. Six input and output terminals are available. Four selectable channels are preprogrammed.
Features
- 10 mW RF output power
- TX 2.2 V to 12 V @ 27 mA, 1 uA at stand-by
- RX 3.0 V to 12 V operation
- MSK modulation
- Receiver sensitivity -120 dBm
- 6 switching signal transmission
- RED compliant (EN 300 220)
- 426 MHz version available (Japan)
Applications
- Remote control applications
- Emergency light
- Alarm systems
- Start / Stop control for motor operated equipment
Other products related to this product
Specifications
Common
Parameter | Specification | Remarks |
---|---|---|
Applicable standard | EN 300 220 | |
Communication method | One way | |
Emission type | F2D | Sub-carrier MSK |
Frequency | 434.075 / 433.920 / 434.600 / 434.700 MHz | |
Number of RF channels | 4 channels | |
RF bit rate | 1,200 bps | |
Operating temperature range | -20 to +60 degree C | No dew condensation |
Communication range | 500 to 1,000m | Line of sight |
Transmitter Part
Parameter | Specification | Remarks |
---|---|---|
Transmitter type | PLL controlled VCO | |
RF output power | 10 mW | |
Inputs | 6 Switch inputs | Negative logic |
Antenna | 1/4 lambda whip antenna | |
Supply voltage | 2.2 to 12 V DC | Max. rating 14.5 V |
Supply current | 27 mA typ. (TX) 1 uA typ. (Stand by) |
|
Dimension | 36 x 26 x 8 mm | Excluding protrusion |
Weight | 15 g |
* Antenna, ANT-LEA-01-R, is included.
Receiver Part
Parameter | Specification | Remarks |
---|---|---|
Receiver sensitivity | -120 dBm | BER 1% |
Outputs | 6-photo MOS relay outputs | |
Output relay | Max. 48 V, 100 mA | AC/DC |
Operating mode | One-shot, Toggle, Keying, Continuous | Set by 3 input ports |
Antenna | 1/4 lambda whip antenna | |
Supply voltage | 3.0 to 12.0 V DC | Max. rating 14.5 V |
Supply current | 16 mA (6 outputs off) 50 mA (6 outputs on) |
|
Dimension | 53 x 35 x 12mm | Excluding protrusion |
Weight | 35 g |
* Antenna, ANT-LEA-01-R, is included.
External View
CDT-TX-02M-R

* Antenna, ANT-LEA-01-R, is included.
CDT-RX-02M-R

* Antenna, ANT-LEA-01-R, is included.
Operation Guide
Version 2.0 | ![]() |
---|
Supplementary Information
Differences between 434MHz and 426MHz | ![]() |
---|---|
Application example video – Sensor and warning system | ![]() |
Telecommand transmitter and receiver, CDT-TX-02M-R and CDT-RX-02M-R 434 MHz | ![]() |
Certifications
DoC for CE (CDT-TX-02M-R, CDT-RX-02M-R) | ![]() |
---|
Parts Change Notice (PCN)
PCN2031001 (Jun. 2020) | ![]() |
---|
Product Discontinuation Notice (PDN)
PDN1907002 (Jul. 2019) | ![]() |
---|
Evaluation Tools : TB-CDT-TX-01 , TB-CDT-RX-01

The test board will save your time and effort for evaluation of CDT-TX-02M-R and CDT-RX-02M-R modules.Communication range can be tested easily by checking the LEDs on the decoder board TB-CDT-RX-01.
TB-CDT-TX-01 and TB-CDT-RX-01 do not include modules CDT-TX-02M-R and CDT-RX-02M-R. Please make sure to order them if needed.The boards can be used for both CDT-TX/RX-01 and CDT-TX/RX-02M-R.
Features
- 6-push buttons and output LEDs.
- Dip switch for receiver mode setting.

External View
TB-CDT-TX-01

TB-CDT-RX-01

Battery holder
Accessories
ANT-LEA-01-R

Lead antenna with plug
...more infoANT-RIG-01-R

Rigid antenna with plug
...more infoANT-01-R

434MHz antenna with extension coaxial cable for the receiver
...more infoCBL-TMP-01-R

Coaxial cable
...more info-
Even in areas with no access to a power supply, the solar powered radio warning system ensures complete safety management in dangerous construction areas such as disaster prone areas and erosion control works.
CDT-TX-02M, CDT-RX-02M, WT-01
The construction area on the river and the general mountainous area around it carry a high risk of mudflow and landslides. While keeping construction workers safe, for the local residents in the area an emergency warning system that can immediately supply a warning is used.
Company name
Hokuyo Construction Co. Ltd.
- What is RSSI? And how to use it?
- What is 12dB SINAD?
- For CDT-TX/RX-02M-R, is it possible to send multiple switching signals at the same time?
- Is it possible to use the CDT-TX/RX-02M-R for data communication?
- What is the reason for long communication range when using CDT-TX/RX-02M-R module?
- How long does it take to start transmission after switching on the CDT-02?
- What is the minimum input pulse width to the CDT-TX-02M-R to cause an output from CDT-RX-02M-R?
- For CDT-TX-02M-R, what does standby mean?
- For the CDT-RX-02M-R, what is the current consumption during listening?
- What kind of battery is used for the transmitter CDT-TX-02M-R 434MHz?
- What is a PhotoMOSFET relay?
- For the CDT-TX-02M-R, can I interface to a microcontroller instead of mechanical switches?
- I want to put the RF module in my enclosure? What do I need to be careful of?
- There is a problem with communication range. What is the problem? What should be checked?
- How should the antenna be handled?
- Can Circuit Design module communicate with a tablet?
- I'd like to use my own antenna on your module. Where can I find the suitable connector (e.g. SP06022)?