Ebyte E800-DTU V8 Series User manual
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E800-DTU(433Lxx-485)-V8
Chengdu Ebyte Electronic Technology Co.,Ltd E800-DTU(433Lxx-485)-V8 UserManual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd I
Contents
1. Product Overview .......................................................................................................................................................1
1.1. Brief introduction............................................................................................................................................1
1.2. Features........................................................................................................................................................... 1
2. Quick start .................................................................................................................................................................. 2
3. Installation Dimension............................................................................................................................................... 4
3.1. Pin description.................................................................................................................................................4
3.2. Dimension....................................................................................................................................................... 5
4. Interface definition ..................................................................................................................................................... 6
4.1. Power supply...................................................................................................................................................6
4.2. RS485 interface ...............................................................................................................................................6
5. Technical indicator ..................................................................................................................................................... 7
5.1. Model specification.........................................................................................................................................7
5.2. General specification parameters ....................................................................................................................7
5.3. Frequency range and channels ........................................................................................................................ 7
5.4. Transmit power level.......................................................................................................................................8
5.5. Air data rate ..................................................................................................................................................... 8
5.6. Current parameter............................................................................................................................................8
5.7. Transceiver Length and Sub-packing Mode ................................................................................................... 8
6. Operating mode..........................................................................................................................................................9
7. Connection diagram when programming ...................................................................................................................9
7.1. Parameter setting details............................................................................................................................... 10
8. Connection diagram in test and practical application............................................................. 错误！未定义书签。
9. Related products .......................................................................................................................................................11
10. Practical application Fields .................................................................................................................................... 11
11. Precautions for Use ................................................................................................................................................ 13
Revision History ...........................................................................................................................................................14
About us ........................................................................................................................................................................14
Chengdu Ebyte Electronic Technology Co.,Ltd E800-DTU(433Lxx-485)-V8 UserManual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd II
Disclaimer
EBYTE reserves all rights to this document and the information contained herein.
Products, names, logos and designs described herein may in whole or in part be
subject to intellectual property rights. Reproduction, use, modification or disclosure to
third parties of this document or any part thereof without the express permission of
EBYTE is strictly prohibited.
The information contained herein is provided “as is” and EBYTE assumes no
liability for the use of the information. No warranty, either express or implied, is given,
including but not limited, with respect to the accuracy, correctness, reliability and
fitness for a particular purpose of the information. This document may be revised by
EBYTE at any time. For most recent documents, visit www.cdebyte.com.
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1. Product Overview
1.1. Brief introduction
E800-DTU is a wireless data transceiver with the function of digital data processing, digital modulation and
demodulation, FEC, balanced soft decision, etc.. Wireless data transceiver provides transparent RS232 / RS485
interface, different with the analog FM transceiver plus MODEM analog digital transceiver.
Wireless data transceiver working as a communication medium, as well as the fiber, microwave, the same line,
has a certain scope of application: it provides some special conditions in the private network monitoring signal
real-time, reliable data transmission, with the features of low cost, convenient installation and maintenance,
diffraction ability, flexible network structure, range of coverage, suitable for the occasion of dot and scatter,
complex geographical environment , connecting with PLC, RTU, rain gauge, level gauge and other data terminals.
1.2. Features
Transmission power is optional, all technical indicators have met the European industry standards.
Use temperature compensation circuit, the frequency stability is better than ±2PPM.
With operating temperature range: -40 ℃ ~ +85 ℃, adapting to a variety of harsh working environment.
All with aluminum alloy shell, compact, easy installation, good heat dissipation; perfect shielding design, good
electromagnetic compatibility and strong anti-interference ability.
Power reverse protection, over-protection, antenna surge protection and other multiple protection functions,
greatly increase the reliability of the transceiver.
Powerful software features, all parameters can be programmed to set: such as power, frequency, air data rate,
address ID, etc.
Ultra-low power consumption, standby current is 20mA (the power consumption of power saving mode and
sleep mode is lower), the transmitting current ≤ 350A (1W).
With watchdog and accurate time layout, in the event of an exception, the module will automatically restart
and continue to follow the previous parameters to operate.
All the core components are imported originally , compared with the current imports of digital transceiver , we
are the most advanced, most cost effective and the smallest one.
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2. Quick start
We need devices below,
Step 1: First install the antenna for the data transmission, then turn on the power, and connect the USB to serial cable (USB to
RS485);
Step 2: Use USB to RS-232,USB to RS-485 or other methods to connect the computer to the digital radio;
Step 3: Start two serial port debugging assistants, select the serial port baud rate as 9600bps and the verification method as 8N1, then
the serial port transparent transmission can be realized;
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Step 4: 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 light, M1 indicator light). Press and hold the Mode button for 1 second and then release it to
switch the mode once. The details of the mode switch are shown in the following table:
Categories
M0
M1
Description
Mode 0
Normal Mode
OFF
OFF
Open UART and RF，transparent transmission is on
( factory default )
Mode 1
Wake-up
Mode
ON
OFF
Transmitting WOR mode, the packet comes with a
preamble code
Mode 2
Power-saving
Mode
OFF
ON
Receiving WOR mode, saving receive power, the mode
can not be transmitted
Mode 3
Sleep Mode
ON
ON
Parameter setting using the configuration software
Note: The DTU has the function of power-down saving mode (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).
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3. Installation Dimension
3.1. Pin description
Pin
NO.
Name
Function
Description
1
3.81mm terminal
block
UART interface/
Power supply
interface
Standard RS-232&485 interface/
Screwing power supply interface
2
PWR-LED
Power LED
Red, lit when the power is on
3
TXD-LED
Transmit LED
Yellow, blinks when sending data
4
RXD-LED
Receive LED
Yellow, blinks when sending data
5
M0-LED
Mode LED
Red,M0 M1 indicate the Operating mode
together
6
M1-LED
Mode LED
Red,M0 M1 indicate the Operating mode
together
7
Mode switch
Tact switch
Control the Operating mode
8
Antenna interface
SMA-K interface
External thread, 10mm, 50Ωcharacteristic
impedance
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4. Interface definition
4.1. Power supply
Users can choose ①the VCC and GND terminal power supply, E800-DTU can use 8~ 28V DC power supply,
but it is recommended to use 12V or 24V DC power supply.
4.2. RS485 interface
E800-DTU can use the 485_A terminal and the 485_B terminal in ②to connect the A terminal and the B terminal of the RS-485
of the device respectively.
Pin NO.
Definition
Function
Description
1
VCC
Screwing power interface,
positive
8 ~ 28V DC, 12V or 24V( recommended )
2
GND
Screwing power interface,
negative
The power supply negative pole is connected to
the system ground and the housing
3
GNDA
RS232 common terminal
Connected to RS 232 device GND
4
B/TXD
Serial port terminal
RS-485: Connected to RS 485 device interface
B
RS-232: Output terminal,connected to RS 232
device RXD
5
A/RXD
Serial port terminal
RS-485: Connected to RS 485 device interface
A
RS-232: Input terminal, connected to RS 232
device TXD
Note: The DTU will be in poor communication when connecting multiple devices , while connecting a single
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device is not, please try to parallel connect a 120Ω resistor between 485_A terminal and 485_B terminal.
5. Technical indicator
5.1. Model specification
Model
Frequency
TX power
Distance
Feature
Application
Hz
W
km
E800-DTU(433LX
X-485)-V8
433M
1
8
LoRa
anti-interfer
ence
To the environment with
small data, far distance
★Note: Test condition: in clear and open air without shelters, 12V /1A power supply, 5dBi gain sucker antenna
over 2 meters height from the ground, with the factory default parameters.
5.2. General specification parameters
NO.
Parameter
Specification
Description
1
Size
82*62*25mm
2
Weight
79g
+/- 4.5g
3
Operating
temperature
-40℃～+85℃
For industrial application
4
Antenna
impedance
50Ω
Standard 50 Ω characteristic impedance
5
Supply voltage
10～28V DC
It is recommended to use 12V or 24V
6
Communication
interface
RS485
Standard DB9 hole / 3.81 terminal block
7
Baud rate
Default 9600
1200 to 115200 bps
8
Address
Default 0
65536 configurable addresses
5.3. Frequency range and channels
Model
Frequency
Band range
Channel gap
Channel numbers
Hz
Hz
Hz
E800-DTU(433LX
X-485)-V8
433M
410～441M
1M
32，half-duplex
★Note: In the same area, multiple groups of DTU are used for one-to-one communication at the same time. It is recommended that
each group of devices should be set with a channel interval of more than 2MHz.
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5.4. Transmit power level
Model
20dBm / 30dBm
17dBm / 27dBm
13dBm / 24dBm
10dBm / 21dBm
E800-DTU(433LXX-485)-
V8
Factory default
√
√
√
★Note: The lower the transmit power, the closer the transmission distance, but the working current will not decrease proportionally.
It is recommended to use the maximum transmit power.
5.5. Air data rate
Model
Default air data
rate
Levels
Air data rate levels
bps
bps
E800-DTU(433LXX-485)-
V8
2.4k
6
0.3k、1.2k、2.4k、4.8k、9.6k、19.2k
★Note: The higher the air rate, the faster the transmission rate, but the shorter the transmission distance; therefore, if the rate meets
the requirements for use, it is recommended that the lower the airspeed, the better.
5.6. Current parameter
Model
Tx current mA
Stand-by current mA
12V
24V
12V
24V
E800-DTU(433LXX-485)
-V8
306
150
22
12
★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 radio.
5.7. Transceiver Length and Sub-packing Mode
Model
Buffer
Sub-packing mode
E800-DTU(433LXX-485
)-V8
512 bytes
Automatically send 58 bytes per package
Note: 1. When the receiving data is more than a single packet capacity (100 bytes), the beyond part will be
automatically assigned to the second transmission until it is completed;
2. The data transceiver can not receive data which is more than the buffer capacity;
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6. Operating mode
There are four operating modes, if low power consumption is not required, it is recommended to configure the
data transceiver for the normal mode (mode 0). The factory default is normal mode (mode 0).
No.
Categories
M0
M1
Description
Mode 0
Normal Mode
OFF
OFF
Open UART and RF，transparent transmission is on
( factory default )
Mode 1
Wake-up
Mode
ON
OFF
Transmitting WOR mode, the packet comes with a
preamble code
Mode 2
Power-saving
Mode
OFF
ON
Receiving WOR mode, saving receive power, the mode
can not be transmitted
Mode 3
Sleep Mode
ON
ON
Parameter setting using the configuration software
★Note: no need to care about the wake-up mode (mode 1) and power saving mode (mode 2) if power
consumption is not a problem.
7. Connection diagram when programming
Operating
mode
M1
M0
Description
Configuration
mode
Light on
Light on
The DTU can only be programmed using the configuration
software in the current mode
★Note: 1. Programming can only be done in a specific working mode (see the table above). If the programming
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fails, please confirm whether the working mode of the DTU is correct.
2. If you don't need complex programming to open the E90-DTU configuration software, you can modify the
relevant parameters.
7.1. Parameter setting details
Parameter
Details
Baud rate
Baud rate when operating 1200bps～115200bps
Parity
8N1:none；8E1: odd；8O1:even；8 data bit，1 stop bit
Air data rate
Wireless communication rate, also called air baud rate. 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.
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8. Related products
Model
Interface
Frequency Hz
TX power dBm
Test distance km
Features
E32-DTU (433L37) -V8
RS232 RS485
410-441M
37
20
LoRa, Anti-interference
E32-DTU (900L30) -V8
RS232 RS485
862-930M
30
8
LoRa, Anti-interference
E32-DTU (900L20)-V8
RS232 RS485
862-930M
20
3
LoRa, Anti-interference
E32-DTU (433L30) -V8
RS232 RS485
410-441M
30
8
LoRa, Anti-interference
E32-DTU (433L20) -V8
RS232 RS485
410-441M
20
3
LoRa, Anti-interference
E90-DTU (433L37) -V8
RS232 RS485
410-441M
37
20
LoRa, Anti-interference
E90-DTU (433L20) -V8
RS232 RS485
410-441M
20
3
LoRa, Anti-interference
E90-DTU (433L30) -V8
RS232 RS485
410-441M
30
8
LoRa, Anti-interference
E95-DTU (433L20-485)-V8
RS485
410-441M
20
3
LoRa, Anti-interference
E95-DTU (433L30-485)-V8
RS485
410-441M
30
8
LoRa, Anti-interference
E96-DTU (433L20-485)-V8
RS485
410-441M
20
3
LoRa, Anti-interference
E96-DTU (433L30-485)-V8
RS485
410-441M
30
8
LoRa, Anti-interference
E800-DTU (400SL20-485)-V8
RS485
410-441M
20
3
LoRa, Anti-interference
E800-DTU (400SL30-485)-V8
RS485
410-441M
30
8
LoRa, Anti-interference
9. Practical application Fields
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:
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10. 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.
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Revision History
Version
Date
Description
Issued By
1.0
2022-06-07
Original Version
LC
About us
Technical support: support@cdebyte.com
Documents and RF Setting download link:：www.ebyte.com
Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com
-------------------------------------------------------------------------------------------------
Official hotline:028-61399028
Web: www.cdebyte.com
Address: B5 Mould park, 199# Xiqu Ave, High tech District, Chengdu, Sichuan, China
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