EBYTE E95/E96-DTU-V8 Wireless Modem User Manual

EBYTE E95/E96-DTU-V8 Wireless Modem User Manual

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Introduction

Brief Introduction

E95/E96-DTU(433Lxx-485)-V8 is a wireless data transmission DTU that uses military-grade LoRa modulation technology. It has a variety of transmission methods.
It works at 410 ～ 441M (default 433MHz).
The DTU provides a transparent RS485 interface, plastic shell. rail type installation structure, support 8～28V（DC）/85～265V（AC）voltage input.
LoRa spread spectrum technology will bring a longer communication distance and has the advantage of strong anti-interference ability.
As a communication medium, wireless data transmission station has a certain scope of application like optical fiber, microwave and open wire: it provides real-time and reliable data transmission of monitoring signals in private networks under certain special conditions, with low cost, installation and maintenance Convenience, strong diffraction ability, flexible network structure, and long coverage, suitable for many and scattered locations, complex geographical environment and other occasions, can be connected with PLC, RTU, rain gauge, level gauge and other data terminals.

Features

• Adopt military-grade LoRa modulation technology, with data encryption, and the packet length can be set;
• Adopt flame-retardant plastic shell, guide rail type installation structure, convenient and efficient installation;
• Hidden buttons are used to switch working modes to avoid false triggers, and the equipment is more reliable in operation;
• Simple high-efficiency power supply design, support power supply configuration or line pressure mode, support 8～ 28V（DC）/85～265V（AC） power supply;
• The transmit power can reach up to 20/30dBm, and supports multi-level adjustment. All technical indicators meet European industrial standards;
• Support Modbus protocol transmission;
• Support wireless sending of command data packets, remote configuration or reading of DTU parameters;
• Support communication key function, effectively prevent data from being intercepted;
• Working temperature range: -40℃～+85℃, adapt to various harsh working environments;
• Multiple protection functions such as power pulse protection, reverse connection protection, and antenna surge protection increase the reliability of the DTU;
• Powerful software function, all parameters can be set by programming: such as power, frequency, air rate, address ID, etc.;
• Built-in watchdog and precise time layout.
  Once an abnormality occurs, the DTU will automatically restart and continue to work according to the previous parameter settings.

Quick Star

1. Prepare two E95-DTU(433L20-485)-V8
   

2. First install the antenna for the digital DTU, and then install the power supply.
   The user selects the power adapter for power supply according to the needs.
   

3. Use USB to RS-485 or other methods to connect the computer to the digital DTU.
   

4. Start two serial port debugging assistants, select the serial port baud rate to be 9600bps (default), and the check method to be 8N1 to make serial port transparent transmission.
   

5. If the customer needs to switch the working mode, it can be controlled by the Mode button to switch between different working modes (M0 indicator, M1 indicator).
   Hold and press the Mode button for 1 second and release it to switch the mode once.
   The mode switching details are shown in the table below:

transmission (factory default mode)
Mode 1| WOR Mode| Light
Off| Light
On| WOR transmission mode, data packet comes with wake-up code
Mode 2| Power Saving
Mode| Light
On| Light
Off| WOR receiving mode, saving its own receiving power consumption, this mode cannot transmit
Mode 3| Configuration
Mode| Light
On| Light
On| The DTU can be programmed using the configuration software

Note:

• The DTU has a power-down save mode function (the factory default setting is transparent transmission mode), the user needs to switch the corresponding mode according to the M1 and M0 indicators (effective immediately).
• “Quick Start” uses “E95-DTU (433L20-485)” as an example, other models refer to the configuration, pay attention to the power input of the AC equipment.

Parts Description

Size

Interface Description

Power interface description

E95/E96-DTU(433LXX-485)-V8 can be powered by 8～28V DC /85～265V (AC) power supply.
The wiring port is connected by a wiring terminal (2 Pin).

Communication interface description
E95/E96-DTU(433LXX-485)-V8 can be connected to the equipment through RS485/RS232 using terminal blocks.

interface
3| B| RS-485 bus B interface| RS-485 B interface is connected to device B interface

Note: When the device is connected with multiple devices, the communication is not smooth, but there is no such phenomenon when a single device is connected.
Please try to connect a 120Ω resistor in parallel between the 485_A terminal and the 485_B terminal.

Technical Parameter

Model specifications

Model| Working Frequency| Trans mit
Power| Distance| Specifications| Recommended Application Scenarios
---|---|---|---|---|---
M Hz| dBm| km
E95-DTU(433L20-485)-V8| 410 ～ 441| 20| 3| LoRa spread spectrum anti-jamming, DC power supply| Suitable for small data volume and long-distance application environment
E95-DTU(433L30-485)-V8| 410 ～ 441| 30| 8| LoRa spread spectrum anti-jamming, DC power supply| Suitable for small data volume and long-distance application environment
E96-DTU(433L20-485)-V8| 410 ～ 441| 20| 3| LoRa spread spectrum anti-jamming, AC power supply| Suitable for small data volume and long-distance application environment
E96-DTU(433L30-485)-V8| 410 ～ 441| 30| 8| LoRa spread spectrum anti-jamming, AC power supply| Suitable for small data volume and long-distance application environment

Note: Sunny, open environment without obstruction, 12V/1A power supply, 5dBi suction antenna, antenna height 2 meters from the ground, use factory default parameters.

General parameter

3

| Working Temperature| -40℃～+85℃| Meet the needs of industrial use
4| Voltage Range| 8～28V（DC）
85～265V（AC）| 12V or 24V recommended for DC version
110V/220V for AC version
5| Interface| RS485| RS485
6| Baud Rate| Default 9600| Baud rate range 1200～115200
7| Address Code| Default 0| A total of 65536 address codes can be set

Frequency range and channel number

Model| Default Frequency| Frequency Range| Channel Spacing| Number of Channels
---|---|---|---|---
Hz| Hz| Hz
E95/E96-DTU(433Lxx-485)-V8| 433M| 410～441M| 1M| 32，Half Duplex

Note: In the same area, multiple groups of digital DTUs are used for one- to-one communication at the same time.
It is recommended that each group of digital DTUs set the channel spacing above 2MH

Transmit power level

Model| 20dBm / 30dBm| 17dBm / 27dBm| 13dBm / 24dBm| 10dBm / 21dBm
---|---|---|---|---
E95/E96-DTU(433Lxx-485)-V8| Factory Default| √| √| √

Note: The lower the transmission power, the closer the transmission distance, but the working current will not decrease in the same proportion.
It is recommended to use the maximum transmission power.

Air data rate level

The higher the air speed setting, the faster the transmission rate and the shorter the transmission distance; therefore, when the speed meets the requirements of use, it is recommended that the airspeed be as low as possible.

Current parameter

Note: It is recommended to reserve more than 50% of the current margin when selecting the power supply, which is conducive to the long-term stable operation of the DTU.

Sending and receiving length and sub-packing method

Note:

1. If the DTU’s single received data is greater than the single packet capacity, the excess data will be automatically allocated to the second transmission until the transmission is completed;
2. The single received data of the DTU cannot be larger than the buffer capacity

Function Details

Point-to-Point transmission (hexadecimal)

Broadcast transmission (hexadecimal)

Broadcast address

• Example: Set the address of DTU A to 0xFFFF and the channel to 0x04.
• When DTU A is used as a transmitter (same mode, transparent transmission mode), all receiving DTU under the 0x04 channel can receive data to achieve the purpose of broadcasting

Listening address

• Example: Set the address of DTU A to 0xFFFF and the channel to 0x04.
• When DTU A is receiving, it can receive all the data under channel 0x04 to achieve the purpose of monitoring.

Operating Mode

E95-DTU has four working modes.
When there is no demanding low power consumption requirement, it is recommended to configure the DTU to transparent transmission mode (mode 0) if normal communication is required;
The default setting of the DTU at the factory is transparent transmission mode (mode 0).

default mode)
Mode 1| WOR Mode| Light
Off| Light
On| WOR transmission mode, data packet comes with wake-up code
Mode 2| Power Saving
Mode| Light
On| Light
Off| WOR receiving mode, saving its own receiving power consumption, this mode cannot transmit
Mode 3| Configuration
Mode| Light
On| Light
On| The DTU can be programmed using the configuration software

Transparent transmission mode (mode 0)

Type| When the M0 indicator light is off and the M1 indicator light is off, the DTU is working in mode 0
---|---
Sending| Users can input data through the serial port, and the DTU will start wireless transmission.
Receiving| The DTU receiving function is turned on, and after receiving the wireless data, it will be output through the serial port TXD pin.

WOR mode (mode 1)

Type| When the M0 indicator light is on and the M1 indicator light is off, the DTU is working in mode 1
---|---
Description| WOR transmission mode, data packet comes with wake-up code

Power Saving mode (mode 2)

Type| When the M0 indicator light is off and the M1 indicator light is on, the DTU is working in mode 2
---|---
Description| WOR receiving mode, saving its own receiving power consumption, this mode cannot transmit

Configuration mode (mode 3)

Type| When the M0 indicator light is on and the M1 indicator light is on, the DTU is working in mode 3
---|---
Description| The DTU can be programmed using the configuration software

PC Configuration Instruction

The following figure shows the display interface of the E95/E96-DTU(433LXX-485)-V8 configuration host computer.
The user can switch to the configuration mode through the MODE button, and quickly configure and read the parameters on the host computer.

The air rate is high, the data transmission speed is fast, and the time delay for transmitting the same data is small, but the transmission distance will be shortened.
Frequency channel| The working frequency of the DTU, each channel corresponds to its different working frequency, in theory, different frequency channels cannot communicate with each other.
If there are multiple groups of wireless data transmission stations in the same area, it is recommended that the communication frequency be separated by 2~5MHz.
TX power| The output power is the power radiated to the outside.
In order to ensure the working efficiency, it is recommended to use the maximum power.
If the transmit power is reduced, the communication distance will be shortened, and the current consumed will be reduced.
DTU address| The internal address of the DTU has nothing to do with the Modbus address.
Only DTU with the same radio address can communicate with each other.
This feature can be used to realize software filtering and grouping.
Input range: 0～65535, decimal number.
TX method| Transparent transmission: Fixed point: send data to fixed point in Hex format
Wake-up time| It is not directly related to the communication delay.
If customers need low-power applications, they need to adjust this option as required.
In the power saving mode, the longer the wake-up time, the lower the power consumption of the receiver, and the greater the communication delay.

Program the DTU

Operating
Mode| M1| M0| Remark
---|---|---|---
Configuration mode| Light On| Light on| Only use the configuration software to program the DTU in the current mode

1. Programming can only be carried out in a specific working mode (see the above table).
   If the programming fails, please confirm whether the working mode of the DTU is correct.

2. If you don’t need complicated programming to open the E95/E96-DTU(433LXX-485)-V8 configuration software, you can modify the relevant parameters

Connection Diagram in Test and Practical Application

Related Products

Model| Interface Type| Frequency Hz| Transmit power dBm| Distance km| Features
---|---|---|---|---|---
E32-DTU (433L37) -V8| RS232 RS485| ****

410-441M

| 37| 20| LoRa spread spectrum, long-distance anti-interference
E32-DTU (900L30) -V8| RS232 RS485| ****

862-930M

| 30| 8| LoRa spread spectrum, long-distance anti-interference
E32-DTU (900L20)-V8| RS232 RS485| ****

862-930M

| 20| 3| LoRa spread spectrum, long-distance anti-interference
E32-DTU (433L30) -V8| RS232 RS485| 410-441M| 30| 8| LoRa spread spectrum, long-distance anti-interference
E32-DTU (433L20) -V8| RS232 RS485| 410-441M| 20| 3| LoRa spread spectrum, long-distance anti-interference
E90-DTU (433L37) -V8| RS232 RS485| 410-441M| 37| 20| LoRa spread spectrum, long-distance anti-interference
---|---|---|---|---|---
E90-DTU (433L20) -V8| RS232 RS485| 410-441M| 20| 3| LoRa spread spectrum, long-distance anti-interference
E90-DTU (433L30) -V8| RS232 RS485| 410-441M| 30| 8| LoRa spread spectrum, long-distance anti-interference
E95-DTU (433L20-485)-V8| RS485| 410-441M| 20| 3| LoRa spread spectrum, long- distance anti-interference
E95-DTU (433L30-485)-V8| RS485| 410-441M| 30| 8| LoRa spread spectrum, long- distance anti-interference
E96-DTU (433L20-485)-V8| RS485| 410-441M| 20| 3| LoRa spread spectrum, long- distance anti-interference
E96-DTU (433L30-485)-V8| RS485| 410-441M| 30| 8| LoRa spread spectrum, long- distance anti-interference
E800-DTU (400SL20-485)-V8| RS485| 410-441M| 20| 3| LoRa spread spectrum, long- distance anti-interference
E800-DTU (400SL30-485)-V8| RS485| 410-441M| 30| 8| LoRa spread spectrum, long- distance anti-interference

Practical Application

Ebyte DTU is suitable for all kinds of point-to-point and point-to-multipoint wireless data transmission systems, such as smart homes, IoT transformation, power load monitoring, distribution automation, hydrology and water regime monitoring and reporting, tap water pipe network monitoring, urban street lights Industrial automation such as monitoring, air defense alarm control, railway signal monitoring, railway water supply centralized control, oil and gas supply pipeline network monitoring, GPS positioning system, remote meter reading, electronic hoisting scale, automatic target reporting, earthquake observation and reporting, fire prevention and theft prevention, environmental monitoring, etc.
System, as shown below:

Precautions for Use

1. Please take good care of the warranty card of the device.
   The warranty card contains the factory number (and important technical parameters) of the device, which has important reference value for the user’s future maintenance and new equipment.

2. During the warranty period, if the DTU is damaged due to the quality of the product itself rather than man-made damage or natural disasters such as lightning strikes, it enjoys free warranty; please do not repair by yourself, and contact our company if there is a problem. Ebyte provides first-class After-sales service.

3. Do not operate this DTU in the vicinity of some flammable places (such as coal mines) or explosive dangerous objects (such as detonators for detonation).

4. A suitable DC stabilized power supply should be selected, which requires strong anti-high frequency interference, small ripple, and sufficient load capacity; preferably, it should also have over-current, over-voltage protection and lightning protection functions to ensure that the DTU is normal jobs.

5. Do not use it in a working environment that exceeds the environmental characteristics of the DTU, such as high temperature, humidity, low temperature, strong electromagnetic field or dusty environment.

6. Don’t let the DTU continuously be in full load transmitting state, otherwise the transmitter may be burnt out.

7. The ground wire of the DTU should be well connected with the ground wire of the external equipment (such as PC, PLC, etc.) and the ground wire of the power supply, otherwise the communication interface will be burnt easily; do not plug or unplug the serial port with power on.

8. When testing a DTU, you must connect a matching antenna or a 50Ω dummy load, otherwise the transmitter will be easily damaged; if the antenna is connected, the distance between the human body and the antenna should be more than 2 meters to avoid injury. Touch the antenna when transmitting.

9. Wireless data transmission stations often have different communication distances in different environments.
   The communication distance is often affected by temperature, humidity, obstacle density, obstacle volume, and electromagnetic environment; in order to ensure stable communication, it is recommended to reserve more than 50% The communication distance margin.

10. If the measured communication distance is not ideal, it is recommended to analyze and improve the communication distance from the antenna quality and antenna installation method.
    You can also contact [email protected] for help.

11. When selecting the power supply, in addition to keeping 50% of the current margin as recommended, it should also be noted that its ripple must not exceed 100mV.

12. Wireless communication products need to be connected to an impedance-matched antenna to work normally.
    Even short-term tests cannot be omitted.
    Product damage caused by this reason will not be covered by the warranty

Revision History

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References

• EBYTE-LoRa/WiFi/Bluetooth/ZigBee wireless modules Manufacturers, industrial IoT terminals suppliers

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