Ebyte E90-DTU User manual

E90-DTU (170L30)

Chengdu Ebyte Electronic Technology Co,;Ltd E90-DTU (170L30) user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 1
Content
1. Introduction .......................................................................................................................................2
1.1. Brief Introduction.................................................................................................................2
1.2. Certificate............................................................................................................................2
1.3. Features...............................................................................................................................3
2. Operation...........................................................................................................................................3
3. Installation Specification......................................................................................................................5
3.1. Structure..............................................................................................................................5
3.2. Dimension ...........................................................................................................................7
4. Interface Defination ............................................................................................................................8
4.1. Power interface definition ......................................................................................................8
4.2. RS232 Interface definition .....................................................................................................8
4.3. RS485 Interface definition .....................................................................................................8
5. Technical indicators ............................................................................................................................9
5.1. Model specifications .............................................................................................................9
5.2. Frequency range and channels ................................................................................................9
5.3. Transmit power level........................................................................................................... 10
5.4. Air data rate....................................................................................................................... 10
5.5. Current parameters.............................................................................................................. 10
5.6. Transceiver Length and Sub-packing Mode............................................................................ 10
6. Operating Mode.................................................................................................................................11
7. Connection diagram when programming.............................................................................................. 12
7.1. Diagrammatic drawing........................................................................................................ 12
7.2. Parameter setting instruction ................................................................................................ 13
8. Connection diagram in test and application .......................................................................................... 14
9. E90 Series........................................................................................................................................ 14
10. Practical application................................................................................................................... 15
11.Note................................................................................................................................................... 16
12.Important statement............................................................................................................................. 16
Revision history....................................................................................................................................... 17
About us................................................................................................................................................ 17

Chengdu Ebyte Electronic Technology Co,;Ltd E90-DTU (170L30) user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 2
1. Introduction
1.1. Brief Introduction
E90-DTU (170L30) is a data transmission station that adopts extremely advanced ultra-narrow band modulation
technology. On the originalbasis, power amplifier (PA) and low noise amplifier (LNA) are built in, so that the maximum
transmitting power reaches 1w and the receiving sensitivity is also improved to a certain extent. Compared with the
products without power amplifier and low noise amplifier, the overall communication s tability is greatly improved.
Different from analog FM stations and modems, digital radio provides transparent RS232/RS485 interface.
The station works in 170MHz frequency band and the communication distance can reach 8km. Wireless digital
radio as a medium of communication, as well as optical fiber, microwave, open wire, there is a certain scope of
application: it provides some special conditions, private network monitoring signals in real-time and reliable data
transmission, low cost, easy installation and maintenance, diffraction capability is strong, flexible network structure, the
coverage is far characteristic, suitable for some more and occasions, such as dispersion and complex geographical
environment with PLC, RTU, rain gauge,level gauge and other data terminal is connected.
1.2. Certificate
E90-dtu has obtained the "radio transmission equipment model approval certificate", whose approval code is ：
CMIIT ID:2017FP5780。
E90-DTU has obtained the "explosion-proof certificate", whose number is: test no.201711000975
E90-dtu has obtained the "electrostatic surge detection report" issued by China testing institute, whose number is
CNEx18.1461.
E90-dtu has obtained the "appearance design patent certificate", and its patent number is ZL 2016 3 0501980.3.
E90-DTU has obtained the "utility model patent certificate", and its patent number is ZL 2016 2 1410691.3.
E90-dtu has obtained the "CE certificate" (mandatory eu certification), whose verification number is
CCISE180514601V.
E90-DTU has obtained an "FCC certificate" with the ID of 2ALPH-E90-DTU.
E90-DTU has obtained the "RoHS certificate" (mandatory EU environmental protection certification), and its report
number is DTI201807025245.

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1.3. Features
★All the core components of the original import, compared with the current similar imported digital radio, the most
advanced function, the smallest size, the best price.
★Using military-grade LoRa modulation technology, greatly enhance the communication distance and
communication stability.
★Large single package, single package maximum support197 bytes,Modbus adaptation.
★Simple and efficient power supply design, support power supply device or line pressure mode, support 10~28V
power supply.
★Transmission power up to 1W, and support multi-level adjustable, all technical indicators up to the 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
★All aluminum alloy shell, compact size, easy installation, good heat dissipation; Perfect shielding design, good
electromagnetic compatibility, strong anti - interference ability.
★Power reverse connection protection, over-connection protection, antenna surge protection and other multiple
protection functions, greatly increasing the reliability of thestation.
★Powerful software functions, all parameters can be set through programming: such as power, frequency, air speed,
address ID, etc
★Ultra-low power consumption, the standby current is only 22mA (power saving mode and sleep mode power
consumption is lower), the emission current 0.3A.
★Built-in watchdog, and accurate time layout, once an exception, the module will automatically restart, and can
continue to work in accordance with theprevious parameter Settings.
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.

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2、Using USB-(RS232) converter or USB-RS (485) converteror otherway to link computer and DTU.
3、Firing up two XCOMs, choosing Baud rate 9600bps, 8N1, the setting which serial port transmission can be
achieved.

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4、User needs to open the mode switch first before link DTU with computer if the user wants to modify parameters.
Firing up E90-DTU 数 传电 台 配置 软件 (E90-DTU parameter configuration application) to modify related
parameters. The mode switch must be reopened to achieve transmission after the configuration.
模式 0 出厂默认状态 模式 2 进行参数配置
3. Installation Specification
3.1. Structure

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Pin NO.
Name
Function
Description
1
DB-9 female socket
RS-232 interface
Standard RS-232 interface
2
3.81 terminal block
RS-485, powerinterface
Standard RS-485 interface and pressureline powerinterface
3
PWR-LED
Power LED
Red, lit when the poweris on
4
TXD-LED
Transmit LED
Yellow, blinks when sending data
5
RXD-LED
Receive LED
Yellow, blinks when receiving data
6
DC powerinterface
Power interface
In-line round hole, outerdiameter 5.5mm, diameter 2.5mm
7
DIP switch
DIP switch
Controlled by working mode
8
Antenna interface
SMA-K interface
external thread, 10mm, 50Ωcharacteristic impedance

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3.2. Dimension
单位：mm

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4. Interface Defination
4.1. Power interface definition
Users can choose ⑥DC 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 chooseany one of thepower supplyis OK;
E90-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 E90-DTU can be connected to the device via RS-232 using the standard DB-9 interface.
4.3. RS485 Interface definition
E90-DTU can connect the485_A terminal and 485_B terminal with the device RS-485 A terminal and B terminal.
Pin NO.
Definition
Function
Description
1
VCC
Crimping powerinterface, positive
10 ~ 28V DC, recommended 12V or 24V
2
GND
Crimping powerinterface, negative
The powersupply negativepole is connected to the system
ground and the housing
3
485_B
RS-485 interface, interface B
The RS-485 interface B is connected to the device interface B
4
485_A
RS-485 interface, interface A
The RS-485 interface A is connected to thedevice interface A

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★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
Model
Frequency
Transmit
power
Distance
Specifications
Application
Hz
W
km
E90-DTU (170L30)
170M
1
8
LoRa spread
spectrum
anti-interference
It is suitable for theapplication
environment with small amount of data
and many obstacles
★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.
NO.
Model
Specification
Description
1
Size（H*W*D）
82 * 62 * 25 mm
See more at 3.2 Dimension
2
Weight
130g
Tolerance: 4.5g
3
Temperature
-40℃～85℃
Meet industrial level
4
Antenna impedance
50 Ω
Standard 50 Ω characteristic impedance
5
Supply voltage
+10 ~ +28V DC
It is recommended to use 12V or 24V
6
Communication interface
RS232/RS485
Standard DB9 hole / 3.81 terminal block
7
Baud rate
Default 9600
from 1200 to 115200 bps
8
Address
Default 0
65536 configurable addresses
5.2. Frequency range and channels
Model
Default frequency
Frequency range
Channel
spacing
Channels
Hz
Hz
Hz
E90-DTU (170L30)
170M
160~173.5M
250K
55，half duplex
★Note: In the same area when multiple data transceivers are communicating one to one at the same time, it is
recommended to setthechannel spacing between each group of data transceivers at 2MHz or more.

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5.3. Transmit power level
Mode
1W
500mW
250mW
125mW
E90-DTU (170L30)
√
√
√
√
★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 usethe maximum transmit power.
5.4. Air data rate
Model
Default air data
rate
Levels
Air data rate(bps)
bps
bps
E90-DTU (170L30)
2.4k
6
0.3、0.6、1.2、2.4、4.8、9.6k
★Note: The higher the air data rate, the faster the transmission rate, the transmission distance is also closer; when the
rate meets the requirements, thelower air data rate, the better quality.
5.5. Current parameters
Model
Transmitting current mA
Standby current mA
12V
24V
12V
24V
E90-DTU (170L30)
293
146
22
13
★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
Model
Buffer
Sub-package
E90-DTU (170L30)
512 bytes
Automatic subcontractingof 197 bytestosend
★Note:
1. If the data received by the station in a single time is larger than the capacity of a single packet, the excess data
will be automatically allocated to the second transmission until the completion of transmission.
2. The data transceiver cannot receive data which is more than the buffer capacity;

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6. Operating Mode
E90-DTU (170L30) 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).
Categories
M1
M0
Description
Mode0
Normal Mode
ON
ON
OpenUART and RF，transparent transmissionis on
Mode1
Wake-up Mode
ON
OFF
Air wake-up mode, the packet comes witha wake-up code,
Mode2
Power-saving Mode
OFF
ON
The air wake-up receive mode, saving receive power,themode
cannot be transmitted
Mode3
Sleep Mode
OFF
OFF
Parameter settingusing theconfiguration software
★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.

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7. Connection diagram when programming
7.1. Diagrammatic drawing
Mode
M1
M0
Description
Mode3
Command mode
Off
Off
Only be programmed using theconfiguration softwarein thecurrent mode

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★Note:
1.programming can only be carried on in a specific mode (see above), if fails, please confirm the work mode.
2.If there’s no complicated programming, opening the E90-DTU数传电台配置软件 (E90-DTU parameter configuration
application) to modify parameters.
7.2. Parameter setting instruction
Parameter
Description
Baud rate
The serial port baudrate of a wireless data stationat work，1200bps～115200bps。
Odd-even
check
Support 8N1:nocheck ；8E1:even-check；8O1:odd-check；Both are 8-bit data bits and 1-bit stop bits.
Air data rate
（bps）
Wireless communication rate, also known as air baud rate air rate high, data transmissionspeed, transmission
of the same data time delay is small, but the transmissiondistance will become shorter.
Transmitting
power
In order to ensure the working efficiency, it is recommended to use themaximum power. If the transmitted
poweris reduced, the communication distance will become shorterand the required current will be reduced
FEC
The lost or interfered data can be partially corrected by complex encoding, which can improve theequivalent
receiving sensitivity by about 3dBm. Turning off thisfunction can reduce thecommunication delay.
Transmission
mode
Fixed length transmission: automatic subcontractingin traditional wireless transmission mode, witha
maximum of 77 bytesperpacket.
Continuous transmission: unlimited packet length, supportingwireless continuous transmission.
Wake Up
Time
There is no direct relationship with the communication delay. If thecustomer needs low-powerapplications,
this optionshall be adjusted as required. In the power-savingmode, thelonger the wake-up time, the lower the
powerconsumptionof the receiving end, and the greater the communication delay.

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Station
Address
Internal address of wireless data station,stationswiththesame address as thoseindependent of Modbus
address can communicate with each other.This feature can be used to realize software filtering grouping input
range :0~65535, decimal number.
Frequency
Channel
It is equivalent to theworking frequency of the wireless data transmission station.Each channel corresponds to
its different working frequency. Theoretically, different frequency channels cannot communicate witheach
other，If there are multiple groups of wireless data stationsin the same area, thecommunication frequency
interval is suggested to be 2~5MHz.
Cipher
function
Only stationswiththe same ciphertext can communicate, and the secondary ciphertext can only be writtenbut
cannot be read.
Cipher text set
Radio ciphertext, input range :0 ~ 65535, decimal number.
8. Connection diagram in testand application
9. E90 Series
Mode No.
Interface
Frequency
Hz
Tx power
dBm
Distance
km
Function feature
E90-DTU(170L30)
RS232 RS485
170M
30
8
LoRa spread spectrum,ultra-strong through
diffraction
E90-DTU(433L30)
RS232 RS485
433M
30
8
LoRa spread spectrum,long distance, anti -
interference
E90-DTU(433L37)
RS232 RS485
433M
37
20
LoRa spread spectrum,20km long distance,
anti - interference

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E90-DTU(433C30)
RS232 RS485
433M
30
3
High-speed continuous transmission, support
ModBus protocol
E90-DTU(433C33)
RS232 RS485
433M
33
4
High-speed continuous transmission, support
ModBus protocol
E90-DTU(433C37)
RS232 RS485
433M
37
10
High-speed continuous transmission, support
ModBus protocol, long distance
E90-DTU(230N27)
RS232 RS485
230M
27
5
Low frequency narrow band, suitable for
complex environment
E90-DTU(230N33)
RS232 RS485
230M
33
8
Low frequency narrow band, suitable for
complex environment
E90-DTU(230N37)
RS232 RS485
230M
37
15
Low frequency narrow band, suitable for
complex environment, superdiffraction
10. Practicalapplication
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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11.Note
1. 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.
2. 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.
3. Please do not operate the transceiver in some flammable places such as coal mines or near explosive atmospheres
(such as detonators).
4. 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.
5. 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.
6. Please do not continuously keep transceiver to transmit in full capacity, or the transmitter might be damaged.
7. 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.
8. 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.
9. 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 ensurestable communication, it is recommended to reserve at least 50 % of the communication dis tance.
10. 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 [e-mail] support.
11. When choosing power supply, it is recommended to keep at least 50% current left and the ripple must not exceed
100mV.
12.Important statement
1. CDEBYTE reserves the right of final interpretation and modification of all the contents ofthis manual.
2. As the hardware and software products continuously improving, this manual may subject to change without notice,
please refer to the latest version.
3. 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;

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Revision history
version
Date
Description
Issued by
1.20
2019-04-12
initial version
Molly
About us
Technical support:[e-mail]
Documents and RF Setting download link: www.ebyte.com
Thank you for using Ebyteproducts! Please contact us with any questionsor suggestions: [e-mail]
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Fax: [phone] ext. 821
Web: www.ebyte.com
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