EBYTE E95-DTU 433L20P-485 Wireless Modem User Manual
- June 6, 2024
- ebyte
Table of Contents
- EBYTE E95-DTU 433L20P-485 Wireless Modem
- Introduction
- Quick Star
- Interface Description
- Technical Index
- Function Details
- Operating Mode
- PC Configuration Instruction
- Program the DTU
- Related Products
- Precautions for Use
- Important Statement
- Revision History
- About us
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
EBYTE E95-DTU 433L20P-485 Wireless Modem
Disclaimer and Copyright Notice
The information in this article, including the URL address for reference, is
subject to change without notice. The document is provided “as is” without any
guarantee responsibility, including any guarantee for merchantability,
suitability for a specific purpose, or non-infringement, and any guarantee
mentioned elsewhere in any proposal, specification or sample. This document
does not take any responsibility, including the responsibility for
infringement of any patent rights caused by the use of the information in this
document. This document does not grant any license for the use of intellectual
property rights in estoppel or other ways, whether express or implied.
The test data obtained in the article are all obtained by the Ebyte
laboratory, and the actual results may vary slightly.
All brand names, trademarks and registered trademarks mentioned in this
article are the property of their respective owners, and it is hereby
declared.
The final interpretation right belongs to Chengdu Ebyte Electronic Technology
Co., Ltd.
Note: The content of this manual may be changed due to product version
upgrades or other reasons. Ebyte Electronic Technology Co., Ltd. reserves the
right to modify the contents of this manual without any notice or prompt. This
manual is only used as a guide. Chengdu Ebyte Electronic Technology Co., Ltd.
makes every effort to provide accurate information in this manual. However,
Chengdu Ebyte Electronic Technology Co., Ltd. does not guarantee that the
contents of the manual are completely free of errors. All statements in this
manual , Information and suggestions do not constitute any express or implied
guarantee.
Introduction
Brief Introduction
E95-DTU(433L20P-485) 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) frequency band (default 433MHz). The DTU provides a
transparent RS485 interface, plastic shell. rail type installation structure,
support 8～28V（DC）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)power supply; -
The transmit power can reach up to 20dBm, 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;
-
The communication port and power interface adopt isolation and high protection;
-
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
You need to prepare two E95-DTU(433L20P-485)
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.
Use USB to RS485 or other methods to connect the computer to the digital
DTU.
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.
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:
No.
| ****
Type
| ****
M1
| ****
M0
| ****
Description
---|---|---|---|---
Mode 0
| Transparent Transmission
Mode
| ****
Light Off
| ****
Light Off
| ****
Serial port open, wireless open, transparent 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).
Interface Description
Technical Index
Model specifications
Model
|
Working Frequency
| Tra nsmi t Pow
er
|
Distance
|
Specifications
|
Recommended Application Scenarios
---|---|---|---|---|---
M Hz| dBm| km
E95-DTU(433L20-485)
| 410 ～
441
|
20
|
3
| LoRa Spread spectrum
anti-interference、DC power supply
| Suitable for small data
volume and long-distance application.
E95-DTU(433L20-232)| 410 ～
441
| 20| 3| LoRa Spread spectrum
anti-interference、DC power
| Suitable for small data
volume and long-distance
| supply | application. |
|---|
E95-DTU(433L30-485)
| 410 ～
441
|
30
|
8
| LoRa Spread spectrum
anti-interference、DC power supply
| Suitable for small data volume and long-distance
application.
E95-DTU(433L30-232)
| 410 ～
441
|
30
|
8
| LoRa Spread spectrum
anti-interference、DC power supply
| Suitable for small data
volume and long-distance application.
E95-DTU(433L20P-48 5)
|
410 ～
441
|
20
|
3
| LoRa Spread spectrum
anti-interference、DC power supply、
Isolated version
| Suitable for small data volume, long-distance application, high
protection.
E95-DTU(433L20P-23 2)
|
410 ～
441
|
20
|
3
| LoRa Spread spectrum
anti-interference、DC power supply、
Isolated version
| Suitable for small data volume, long-distance application, high
protection.
E95-DTU(433L30P-48 5)
|
410 ～
441
|
30
|
8
| LoRa Spread spectrum
anti-interference、DC power supply、
Isolated version
| Suitable for small data volume, long-distance application, high
protection.
E95-DTU(433L30P-23 2)
|
410 ～
441
|
30
|
8
| LoRa Spread spectrum
anti-interference、DC power supply、
Isolated version
| Suitable for small data volume, long-distance application, high
protection.
E96-DTU(433L20-485)
| 410 ～
441
|
20
|
3
| LoRa Spread spectrum
anti-interference、AC power supply、
| Suitable for small data volume, long-distance
application
E96-DTU(433L20-232)
| 410 ～
441
|
20
|
3
| LoRa Spread spectrum
anti-interference、AC power supply、
| Suitable for small data volume, long-distance
application
E96-DTU(433L30-485)
| 410 ～
441
|
30
|
8
| LoRa Spread spectrum
anti-interference、AC power supply、
| Suitable for small data volume, long-distance
application
E96-DTU(433L30-232)
| 410 ～
441
|
30
|
8
| LoRa Spread spectrum
anti-interference、AC power supply、
| Suitable for small data volume, long-distance
application
Note: In fine weather, open environment without obstruction, 12V/1A power supply, 5dBi suction cup antenna, the antenna is 2 meters above the ground, and the factory default parameters are used.
General specification
| No. | Terms | Specifications | Description |
|---|---|---|---|
| 1 | Size | 926730 mm | Review installation dimensions for details |
| 2 | Weight | 95 g | Weight tolerance 5g |
| 3 | Working |
Temperature
| -40℃～+85℃| Meet the needs of industrial use
4| Voltage Range| 8～28V（DC）| It is recommended to use 12V or 24V for DC
5| Interface| RS485| RS485， subject to product identification
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-DTU(433L20P-485)| 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 2MHz.
Transmit power level
Model
|
20dBm
|
17dBm / 27dBm
|
13dBm / 24dBm
|
10dBm / 21dBm
---|---|---|---|---
E95-DTU(433L20P-485)| 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 speed class
Model
| Default Air Rate|
Level
| Air Speed Class
---|---|---|---
bps| bps
E95-DTU(433L20P-485)| 2.4k| 6| 0.3k、1.2k、2.4k、4.8k、9.6k、19.2k
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.
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
No.
|
Type
|
M1
|
M0
|
Description
---|---|---|---|---
Mode 0
| Transparent
transmission mode
|
Light Off
|
Light Off
|
Serial port open, wireless open, transparent 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
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-DTU(433L20P-485)
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.
Program the DTU
Operating
Mode
| ****
M1
| ****
M0
| ****
Remark
---|---|---|---
Configuration
mode
| ****
Light On
| Light Off| Only use the configuration software to program the DTU in the
current mode
- 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.
- If you don’t need complicated programming to open the E95-DTU(433L20P-485) configuration software, you can modify the relevant parameters.
Related Products
Model
| ****
Interface Type
| ****
Frequency Hz
| Transmit power
dBm
| Dista nce
km
| ****
Features
---|---|---|---|---|---
E95-DTU(433L20-485)
| ****
RS485
| ****
410 ～ 441
| ****
20
| ****
3
| Cost-effective LoRa, rail type, RS485,
E90-DTU L series intercommunication, DC power supply
E95-DTU(433L20-232)
| ****
RS232
| ****
410 ～ 441
| ****
20
| ****
3
| Cost-effective LoRa, rail type, RS232,
E90-DTU L series intercommunication, DC power supply
E95-DTU(433L30-485)
| ****
RS485
| ****
410 ～ 441
| ****
30
| ****
8
| Cost-effective LoRa, rail type, RS485,
E90-DTU L series intercommunication, DC power supply
E95-DTU(433L30-232)
| ****
RS232
| ****
410 ～ 441
| ****
30
| ****
8
| Cost-effective LoRa, rail type, RS232,
E90-DTU L series intercommunication, DC power supply
E95-DTU(433L20P-485)
| ****
RS485
| ****
410 ～ 441
| ****
20
| ****
3
| Cost-effective LoRa, rail type, RS485,
E90-DTU L series intercommunication, high protection, DC power supply
E95-DTU(433L20P-232)
| ****
RS232
| ****
410 ～ 441
| ****
20
| ****
3
| Cost-effective LoRa, rail type, RS232,
E90-DTU L series intercommunication, high protection, DC power supply
E95-DTU(433L30P-485)
| ****
RS485
| ****
410 ～ 441
| ****
30
| ****
8
| Cost-effective LoRa, rail type, RS485,
E90-DTU L series intercommunication, high protection, DC power supply
E95-DTU(433L30P-232)
| ****
RS232
| ****
410 ～ 441
| ****
30
| ****
8
| Cost-effective LoRa, rail type, RS232,
E90-DTU L series intercommunication, high protection, DC power supply
E96-DTU(433L20-485)
| ****
RS485
| ****
410 ～ 441
| ****
20
| ****
3
| Cost-effective LoRa, rail type, RS485,
E90-DTU L series intercommunication, AC power supply
E96-DTU(433L20-232)
| ****
RS232
| ****
410 ～ 441
| ****
20
| ****
3
| Cost-effective LoRa, rail type, RS232,
E90-DTU L series intercommunication, AC power supply
E96-DTU(433L30-485)
| ****
RS485
| ****
410 ～ 441
| ****
30
| ****
8
| Cost-effective LoRa, rail type, RS485,
E90-DTU L series intercommunication, AC power supply
---|---|---|---|---|---
E96-DTU(433L30-232)
| ****
RS232
| ****
410 ～ 441
| ****
30
| ****
8
| Cost-effective LoRa, rail type, RS232,
E90-DTU L series intercommunication, AC power supply
Precautions for Use
- 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.
- 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.
- 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).
- 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.
- 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.
- Don’t let the DTU continuously be in full load transmitting state, otherwise the transmitter may be burnt out.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
Important Statement
- Ebyte reserves the right of final interpretation and modification of all contents in this manual.
- Due to the continuous improvement of product hardware and software, this manual may be changed without prior notice. The latest version of the manual shall prevail.
- It is everyone’s responsibility to protect the environment: In order to reduce the use of paper, this manual only prints the Chinese part, and the English manual only provides electronic documents. If necessary, please download it from our official website; in addition, if not specifically requested by the user, the user can order in bulk At the time, we only provide product manuals according to a certain percentage of the order quantity, not every DTU is matched with it, please understand.
Revision History
| Version | Date | Description | Issued By |
|---|---|---|---|
| 1.0 | 2020-08-17 | Original Version | ken |
| 1.1 | 2021-02-05 | L series integration | ken |
About us
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