EBYTE E34-DTU Wireless Modem User Manual

E34-DTU (2G4H20) is a full duplex wireless data transmission module for point-to-point transmission( Has both RS232 and RS485), transmission power is 100mW, transparent transmission mode, working in 2400MHz band high-performance 2.4g wireless module, UART serial port interface, transparent transmission, at the same time support 3.3v or 5.0v system, packet loss automatic retransmission, support automatic frequency hopping, anti-interference ability is very strong.

E34-DTU (2G4H20) in order to ensure the secrecy and anti-interference of communication, compared with fixed-frequency communication, frequency-hopping communication is more covert and difficult to be intercepted.

Support address function, host can transmit data to any address of any channel module, network relay and other applications; The air speed is high, so the transmission speed is fast, the delay is small and the data throughput is large. It is especially suitable for applications requiring small delay and large data volume, such as real-time remote control with good anti-interference ability. Even if some frequency points are interfered, it can still carry out normal communication on other frequency points that are not interfered, and it has been mass produced and widely used in related industries E34-DTU (2G4H20) is Strictly abided by domestic and foreign design specifications such as FCC CE and CCC, meet various rf related certification, and meet export requirements

1.2. Features

All core components are originally imported; our transceiver modems have much advanced functions with smaller size and lower cost.
The top TX power is 100mW, all technical parameters meet European industrial standards.

Temperature compensators are adopted to make the frequency stability better than ±1.5PPM.
Operation temperature range: -40℃ ～ +85℃, applicable for various harsh environment, it is real industrial grade products.

Aluminum alloy case, compact size, great heat dispersion; good shielding, prime electromagnetic compatibility and strong anti-interference.
Power reverse & overload protection and antenna surge protection functions significantly improve the reliability.

Parameters can be configured by programming, such as TX power, frequency point, air data rate, address and so on.
Ultra-low power consumption, standby current is only 25.5mA (even lower under power-saving and sleep modes), TX current ≤0.14A .

Embedded watch-dog and precise time layout, modem will restart automatically upon abnormal situation and work with previous parameters.
The transceivers adopt original nRF24L01P+ chip, customers highly comment the products because of the super reliability.

2. Operation

Main parts

1、First step is to mount antenna, then battery, making sure the dial switch is on its right status. User gets on the power by choosing either VCC/GND or power adapter.

2、Using USB-(RS232) converter or USB-RS(485) converter or other way to link computer and DTU.

3、Firing up two XCOMs, choosing Baud rate 9600bps, 8N1, the setting which serial port transmission can be achieved.

4、User needs to open the mode switch first before link DTU with computer if the user want to modify parameters.
Firing up E34-DTU 数传电台配置软件(E34-DTU parameter configuration application) to modify related parameters.
The mode switch must be reopened to achieve transmission after the configuration.

3. Installation Specifications

3.1. Structure

3.2. Dimension

4. Interface Definition

4.1. Power interface definition

Users can choose ⑥ DC power interface, using the power adapter supply with the interface of the 5.5mm outer diameter , 2.5mm diameter ;
Also choose the VCC and GND terminal power supply, only choose any one of the power supply is OK;
E34-DTU can use 10~ 28V DC power supply, but it is recommended to use 12V or 24V DC power supply.

4.2. RS232 Interface definition
The E34-DTU can be connected to the device via RS-232 using the standard DB-9 interface.

4.3. RS485 Interface definition
E34-DTU can connect the 485_A terminal and 485_B terminal with the device RS-485 A terminal and B terminal.

Note: The transceiver will be in poor communication when connected to multiple devices, it is recommended to be connected to a single device, please try to use parallel 120Ω resistor between 485_A terminal and 485_B.

5. Technical indicators

5.1. Model specifications

★ Note: Test condition: in clear and open air without shelters, 12V /2A power supply, 5dBi gain sucker antenna over 2 meters height from the ground, with the factory default parameters.

5.2. General specification parameters

5.3. Frequency range and channels

Note: In the same area when multiple data transceivers are communicating one to one at the same time, it is recommended to set the channel spacing between each group of data transceivers at 2MHz or more.

5.4. Transmit power level

Note: The lower the transmit power, the closer the transmission distance, but the working current won’t be declined in exact proportion, it is recommended to use the maximum transmit power.

5.5. Current parameters

Note: It is recommended to retain more than 50% of the current margin when selecting the power supply, which will help the data transceiver to work steadily for a long time.

5.6. Transceiver Length and Sub-packing Mode

Note:

When the receiving data is more than a single packet capacity, the beyond part will be automatically assigned to the second transmission until it is completed;

The data transceiver cannot receive data which is more than the buffer capacity;

6. Operating mode

E34-DTU(2G4H20) has four operating modes, if low power consumption is not required, normal communication is recommended to configure the data transceiver for the normal mode (mode 0);
The factory default is normal mode (mode 0).

Note: no need to care about the wake-up mode (mode 1) and power saving mode (mode 2) if it doesn’t request low power consumption.

7. Connection diagram when programming

7.1. diagrammatic drawing

Note:

programming can only be carried on in a specific mode(see above), if fails, please confirm the work mode.
If there’s no complicated programming, opening the E34-DTU 数传电台配置软件(E34-DTU parameter configuration application) to modify parameters.

7.2. Parameter setting instruction

8. Connection diagram in test and application

9. E32-DTU series

10. Practical application

The data transceiver of CDEBYTE is applied for all kinds of point to point, one point to multiple points wireless data transmission system, such as smart home, Internet of things transformation, power load monitoring, distribution network automation, hydrological and hydrological forecasting, water pipe network monitoring, urban street lamps Monitoring, air defense alarm control, railway signal monitoring, centralized control of railway water supply, oil supply pipe network monitoring, GPS system, remote meter reading, electronic crane, automatic reporting, seismic forecasting, fire prevention, environmental monitoring and other industrial automation system, as shown below:

11. Note

Please keep the warranty card of the equipment which includes the factory number (and important technical parameters) and is important for user’s future maintenance and new equipment.
Transceiver during the warranty period, if the quality of the product itself rather than man-made damage or lightning and other natural disasters caused by damage, enjoys free warranty; please do not repair by yourself, the problem and please contact with our company when problem occurring, we offer the first-class after-sales service.

Please do not operate the transceiver in some flammable places such as coal mines or near explosive atmospheres (such as detonators).
Please use the appropriate DC power supply, high frequency interference ability, small ripple, and enough load capacity are required; it’s better to have over current, over voltage protection and lightning protection and other functions to ensure that transceiver working properly.
Please do not use it in the working environment beyond the transceiver environmental characteristics , such as high temperature, humidity, low temperature, strong electromagnetic fields or dust larger environment.

Please do not continuously keep transceiver to transmit in full capacity, or the transmitter might be damaged.
Please connect the ground with the external ground of the power supply (such as PC, PLC, etc.) , otherwise it is easy to burn out the communication interface; do not plug the interface with power supplying.
When testing, please connect the antenna or 50 Ω load, otherwise transceiver will be damaged easily ;the distance from the antenna is better than 2 meters, so as to avoid harm, please do not touch the antenna when transmitting.

Wireless data transceiver has different communication distance in different environments, communication distance is influenced by temperature, humidity, obstacle density, obstacle volume and electromagnetic environment; in order to ensure stable communication, it is recommended to reserve at least 50 % of the communication distance.
When communication distance is not perfect, it is recommended to improve the antenna quality and the installation mode of the antenna. You can send mail to support@cdebyte.com for support.
When choosing power supply, it is recommended to keep at least 50% current left and the ripple must not exceed 100mV.

12. Important statement

CDEBYTE reserves the right of final interpretation and modification of all the contents of this manual.
As the hardware and software products continuously improving, this manual may subject to change without notice, please refer to the latest version.

Everyone is responsible for protecting the environment: to reduce the use of paper, we only provide electronic documents of the English manual, if necessary, please go to our official website to download; In addition, for special requirements, we agree to offer certain amount of documents according to order quantity, not every data transceiver are supplied with one manual, please understand;

Revision history

About us
Technical support: support@cdebyte.com
Documents and RF Setting download link: https://www.ru-ebyte.com
Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com
Address: Building B5, 199 West Avenue, High-tech West District, Chengdu

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EBYTE E34-DTU Wireless Modem [pdf] User Manual
E34-DTU Wireless Modem, E34-DTU, Wireless Modem, Modem

References

User Manual