Ebyte E90-DTU User manual

成都亿佰特电子科技有限公司 E90-DTU(400SL30P)用户使用说明书
Copyright ©2012–2019，成都亿佰特电子科技有限公司
E90-DTU(400SL30P)

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
1
Contents
1. Introduction.................................................................................................................................................................3
1.1 Brief introduction..............................................................................................................................................3
1.1.1 Certificate...............................................................................................................................................3
1.1.2 Features.................................................................................................................................................. 3
2. Quick Start.................................................................................................................................................................. 5
3. Dimensions................................................................................................................................................................11
3.1 Parts description..............................................................................................................................................11
4. Interface definition....................................................................................................................................................13
4.1 Power interface............................................................................................................................................... 13
4.2 RS232..............................................................................................................................................................14
4.3 RS485..............................................................................................................................................................14
5. Technical specification..............................................................................................................................................15
5.1 Model specification.........................................................................................................................................15
5.2 General specification parameter..................................................................................................................... 15
5.3 Frequency and channel numbers.................................................................................................................... 15
5.4 Transmitting power......................................................................................................................................... 15
5.5 Air data rate.....................................................................................................................................................16
5.6 Current............................................................................................................................................................ 16
5.7 TX and RX FIFO and sub-packing method....................................................................................................16
6. Function Description.................................................................................................................................................16
6.1 Fixed Transmission（Hexadecimal）............................................................................................................16
6.2 Broadcast Transmission（Hexadecimal）.....................................................................................................17
6.3 Broadcast Address........................................................................................................................................17
6.4 Monitor Address..............................................................................................................................................17
7.1 Normal mode（Mode 0）..............................................................................................................................18
7.2 Wor sending mode（Mode 1）......................................................................................................................18
7.3 WOR receiving mode（Mode 2）.................................................................................................................18
8. Relay networking mode............................................................................................................................................ 19
9. Configuration instructions on computer................................................................................................................... 21
9.1 Configuration considerations..........................................................................................................................21
9.2 Factory default parameters............................................................................................................................. 21
9.3 Configuration software and parameter description........................................................................................ 21
Three main configuration function descriptions.......................................................................................... 22
Local configuration.......................................................................................................................................23
Remote configuration................................................................................................................................... 24
RSSI real-time monitoring............................................................................................................................25
9.4 Configuration parameter description of upper computer............................................................................... 25
10. Programming the modem........................................................................................................................................29
10.1 Connection diagram......................................................................................................................................29
11. Connection diagram in test and practical application.............................................................................................30
12.E90-DTU(SL Series)................................................................................................................................................31
13.Application field...................................................................................................................................................... 32
14.Operation notes........................................................................................................................................................ 33

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
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Important statement...................................................................................................................................................... 34
Revision history............................................................................................................................................................ 34
About us........................................................................................................................................................................ 34

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
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1. Introduction
1.1 Brief introduction
E90-DTU (400SL30P) is a true high-quality industrial-grade wireless digital radio. The power supply supports
electrostatic discharge anti-interference level 4 protection,fast transient anti-interference level 4 protection,surge impact
anti-interference Level 3 Protection. It can be used in industrial applications where the electromagnetic environment is
more complicated. The radio adopts LORA spread spectrum technology, and its powerful anti-interference ability makes
wireless communication more stable and reliable in the industrial field.
It has multiple transmission modes, working in the (410.125 ~ 493.125MHz) frequency band (default 433.125MHz),
the radio provides transparent RS232/RS485 interface, supports 8 ~ 28V voltage input. LoRa direct-sequence spread
spectrum technology will bring longer communication distances, and has the advantages of concentrated power density
and strong anti-interference ability. The module has a software FEC forward error correction algorithm, which has high
coding efficiency and strong error correction capability. In the case of sudden interference, it can actively correct the
interfered data packets, greatly improving reliability and transmission distance. In the absence of FEC, such packets can
only be discarded. The radio has data encryption function, and the data transmitted by the radio in the air has randomness.
The data interception is meaningless through strict encryption and decryption algorithms; the packet length setting is
supported, and different real-time and data packets are supported.
As a communication medium, wireless digital radio has the same scope as optical fiber, microwave and bright line:
it provides real-time and reliable data transmission of monitoring signals in private networks under certain special
conditions, with low cost and installation and maintenance. Convenient, strong diffraction ability, flexible network
structure and long coverage. It is suitable for multi-point and location dispersion, complex geographical environment, etc.
It can be connected with PLC, RTU, rain gauge, liquid level meter and other data terminals.
1.1.1 Certificate
E90-DTU is certified with “EMC high protection level certification”，ID: AGXA119W00150;
E90-DTU is certified with CMIIT ID:2017FP5780 by SRRC;
E90-DTU is certified with “Certificate of conformity on explosive application protection”，ID: 201711000975.;
E90-DTU is certified with “Electrostatic surge test report” by National Institute of Measurement and Testing
Technology，ID：CNEx18.1461;
E90-DTU is certified with “Certificate of Design Patent”，Patent Number：ZL 2016 3 0501980.3;
E90-DTUis certified with “Utility model patent certificate”，Patent Number：ZL 2016 2 1410691.3;
E90-DTU is certified with “CE” , ID：CCISE180514601V;
E90-DTU is certified with “FCC”, ID：2ALPH-E90-DTU;
E90-DTU is certified with “RoHS”，ID：DTI201807025245.
1.1.2 Features
supports electrostatic discharge anti-interference level 4 protection,fast transient anti-interference level 4
protection,surge impact anti-interference Level 3 Protection.
Environmental field strength dynamic indication, data packet RSSI dynamic indication;
Software and hardware dual watchdogs;

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Wireless air configuration;
Dust and moisture resistance;
The product is easy to use and configured by the host computer;
6-year warranty;
Using the latest LoRa technology, it has a longer distance and more powerful performance than traditional LoRa
digital radio stations;
Using military-grade LoRa modulation technology, with data encryption, the packet length is available for
configuration;
Large single package, single package is up to 240 bytes;
Simple and efficient power supply design, support power adapter or crimping mode, support 8~28V power supply.
Transmit power is up to 1W, multi-level adjustable, with all technical indicators meeting European industrial
standards.
Support LBT function, the transceiver automatically waits to send data according to the current ambient noise
intensity. The communication success rate of the module in harsh environments is greatly improved.
Remotely configure or read wireless module parameters by sending command packets wirelessly.
Support communication key function to effectively prevent data from being intercepted;
Multi-level relay networking can be realized ，which effectively extends communication distance for
ultra-long-distance communication.
With temperature compensation circuit, the frequency stability is better than ±1.5PPM.
Operating temperature range: -40 ° C ~ +85 ° C, to adapt to a variety of harsh working environment.
All-aluminum alloy casing, compact size, easy installation and good heat dissipation; perfect shielding design, with
good electromagnetic compatibility and strong anti-interference ability.
Multiple protection functions such as power reverse connection protection, over-current protection, and antenna
surge protection greatly increase the reliability of the device.
Powerful software functions, all parameters can be programmed: such as power, frequency, air data rate, address ID,
etc.
Ultra-low power consumption, standby current is only 12V / 42mA (lower power consumption in power saving
mode and sleep mode);
with built-in watchdog and precise time layout, once an exception occurs, the transceiver will automatically restart,
and continue to work according to the previous parameters.

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
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2. Quick Start
You need to prepare items below,
Note: The distance between two high-power DTUs should be more than 1 meter, otherwise it may cause damage!
1. First install the antenna for the digital radio station, and then use USB to RS-232 or USB to RS-485 to connect
the computer to the digital radio station. The computer opens the host computer software, selects and opens the serial port,
and clicks to search for the device (at this time the host computer The status bar shows: Establishing connection !!!).

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
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2. Then plug in the radio power, and the device will automatically connect with the host computer (the status bar of
the host computer will display: The configuration connection is successful !!!)

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
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3. After the connection is established, you can use the host computer to configure the parameters of the radio, or
remotely configure other module radios.
Please read the parameters before configuration. After selecting the parameters that need to be set and clicking the
write parameter button, the parameters can be written into the radio, and it will take effect after exiting the
configuration mode.

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
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3. After the parameters are configured, click the exit button, the radio will exit the connection and work according to the

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
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set working mode and parameters (no need to restart the radio);
4. Communication test, start two serial port debugging assistants, select the serial port baud rate and verification method
that are consistent with the radio parameters, and then realize the serial port transparent transmission (note: the
parameters of the two radios need to be set the same);

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
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Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
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3. Dimensions
3.1 Parts description

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
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No.
Name
Function
Note
1
RS-232
RS-232 interface
Standard RS-232 interface
2
RS485 A
RS485 interfaceA
RS485 interface A is connected to device A
interface
3
RS485 B
RS485 interfaceB
RS485 interface B is connected to device B
interface
4
DC-IN -
Crimping power
input negative
Power reference ground
5
DC-IN +
Crimping power
input positive
Power input
6
DC-IN stand
DC socket
5.5*2.1mm
Power input
7
PWR-LED
Power Indicator
Red, lit when the power is on
8
TX/RX-LED
Data sending and
receiving indicator
Green, blinking when sending data.
Blue, blinking when receiving data.
9
MODE-LED
Status Indicator
Cyan light on: transparent transmission mode
Blue light on: WOR send mode
Green light on: Wor receive mode
10
Ground screw
Connect with the
earth
Connect with the earth
11
Antenna interface
SMA-K interface
external thread, 10mm, 50Ωcharacteristic
impedance

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4. Interface definition
4.1 Power interface
Users can choose ⑥DC power interface,using the power adapter supply with the interface of the 5.5mm outer

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
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diameter , 2.5mm diameter ;
Also users can choose the VCC and GND terminal power supply from ②, both are optional；
It can also be powered by ⑤VCC terminal and ④GND terminal, just choose any one of the power supply modes;
8 ~ 28V DC power supply, it is recommended to use 12V or 24V DC power supply for E90-DTU.
4.2 RS232
The E90-DTU can be connected to the device via RS-232 using the standard DB-9 interface.
4.3 RS485
E90-DTU can use ②485_A terminal and ③485_B terminal to connect RS-485 A terminal and B terminal of the
device respectively.
Pin NO.
Definition
Function
Description
2
485_A
RS-485 interface，A interface
The RS-485 interface A is connected to the device
interface A
3
485_B
RS-485 interface，B interface
The RS-485 interface B is connected to the device
interface B
4
GND
Crimping power interface,
negative
The power supply negative pole is connected to the
system ground and the housing
5
VCC
Crimping power interface,
positive
8 ~ 28V DC, recommended 12V or 24V
Note: When the radio is connected to multiple devices, communication is not smooth, but it is not the case with a single
device. Please try to connect a 120Ωmatching resistor in parallel between the 485_A terminal and the 485_B terminal.

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL30P)User manual
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5. Technical specification
5.1 Model specification
Model No.
Frequency
TX power
Distance
Features
Recommended application
Hz
W
km
E90-DTU(400SL30P)
433.125M
1
10
LoRa，
anti-interference
Suitable for transmission of fast
speed in complex environment
with data interference over a long
distance
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 parameter
No.
Item
Value
Note
1
Size
108*75*37mm
See more in 3.Dimensions
2
Weight
237.8g
±4.5 g
3
Temperature
-40℃～+85℃
Meet industrial request
4
Antenna
impedance
50Ω
Standard 50 Ω characteristic impedance
5
Supply voltage
8～28V 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 1200~115200
8
Address
Default 0
65536 configurable address
5.3 Frequency and channel numbers
Model No.
Default
Frequency
Frequency Range
Channel
Interval
Channel numbers
Hz
Hz
Hz
E90-DTU(400SL30P
)
433.125M
410.125～493.125M
1M
84，half duplex
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 Transmitting power
Model No.
1W
500mW
250mW
125mW

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E90-DTU(400SL30P)
Default
√
√
√
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 Air data rate
Model
Default
Levels
Air data rate (bps)
bps
bps
E90-DTU(400SL30
P)
2.4k
8
0.3、1.2、2.4、4.8、9.6、19.2、38.4、62.5k
Note: The higher the air data rate, the faster the transmission rate, the transmission distance is also closer; when the rate
meets the requirements , the lower air data rate, the better quality.
5.6 Current
Model
Supply voltage V
TX current mA
Standby current
mA
E90-DTU(400SL30
P)
8
436
60
12
288
42
24
149
23
28
130
20
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.
5.7 TX and RX FIFO and sub-packing method
Model No.
Buffer
Sub-packing method
E90-DTU(400SL30P
)
1000 字节
Can be sub-packed to 32/64/128/240 byte each time
via command
Note: 1. 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;
2. The data transceiver can not receive data which is more than the buffer capacity;
6. Function Description
6.1 Fixed Transmission（Hexadecimal）
During fixed-point transmission, the module recognizes the first three bytes of the serial data received as:
Address high + address low + channel, and use it as a wireless transmission target.

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6.2 Broadcast Transmission（Hexadecimal）
6.3 Broadcast Address
For example: Set the address of module A as 0xFFFF and channel as 0x04;
When module A is the transmitter (same mode, transparent transmission), all modules under channel 0x04 will
receive the data, the purpose of broadcast is realized.
6.4 Monitor Address
For example: Set the address of module A as 0xFFFF and channel as 0x04;

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When module A is the receiver, it can receive the data sent from all modules under channel 0x04. The purpose of
monitor is realized.
7.Operating mode
The E90-DTU has three working modes, which are configured by the host computer software. Among them, when
there is no demand for low power consumption and normal communication is required, it is recommended to configure
the radio to the general mode (mode 0); the factory default setting is the general mode (Mode 0).
Categories
Notes
Mode 0
Normal Mode
Serial port open, wireless open, transparent transmission (factory default
mode), support special command air configuration.
Mode 1
Wor sending
mode
WOR sender
Mode 2
WOR
receiving
mode
WOR receiver
Note: if there is no need for low power consumption, there is no need to care about the wor receiving mode (mode
2).
7.1 Normal mode（Mode 0）
Type
Software configuration module working in mode 0
Transmitting
The user can input data through the serial port, and the module will start the
wireless transmission.
Receiving
The wireless receiving function of the module is turned on, and the wireless data
will be output through the serial port pin after receiving.
7.2 Wor sending mode（Mode 1）
Type
Software configuration module working in mode 1
Transmitting
When defined as a transmitter, a wake-up code will be automatically added for a
certain period of time before transmission.
Receiving
It can receive data normally, and the receiving function is equivalent to mode 0
7.3 WOR receiving mode（Mode 2）
Type
Software configuration module working in mode 2
Transmitting
Wireless transmission off
Receiving
Sleep at ordinary times. Periodically wake up to check whether there is data. If
there is data, receive it and enter sleep after processing.

成都亿佰特电子科技有限公司 E90-DTU(400SL30P)用户使用说明书
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8. Relay networking mode
No.
Relay mode description
1
After setting the relay mode through configuration, switch to the general mode and the relay starts to work.
2
In the relay mode, ADDH and ADDL are no longer used as module addresses, but are forwarded to the
NETID respectively. If one network is received, it is forwarded to the other network. The repeater's own
network ID is invalid.
3
In the relay mode, the serial port of the relay module cannot send and receive data and cannot perform
low-power operation.
4
When the user enters other modes from mode 3 (sleep mode) or during the reset process, the module will
reset the user parameters, during which AUX outputs low level.
Relay network rules:
1. Forwarding rules. The relay can forward data in both directions between two NETIDs.
2. In relay mode, ADDH \ ADDL is no longer used as the module address, and is forwarded and matched as NETID.
3. In the relay mode, please do not send more than the set single packet sub-byte
As shown in the figure:
①Primary relay
"Node 1" has a NETID of 08.
"Node 2" has a NETID of 33.
ADDH \ ADDL of relay 1 is 08 and 33 respectively.
So the signal sent by node 1 (08) can be forwarded to node 2 (33)
At the same time, node 1 and node 2 have the same address, so the data sent by node 1 can be received by node 2.
②Secondary relay
The ADDH \ ADDL of relay 2 is 33,05, respectively.
So relay 2 can forward the data of relay 1 to the network NETID: 05.
Thus node 3 and node 4 can receive node 1 data. Node 4 normally outputs data. Node 3 and Node 1 have different
addresses, so no data is output.
③Two-way relay
As shown in the figure, the data sent by node 1 can be received by nodes 2 and 4, and the data sent by node 2 and 4
can also be received by node 1.