Ebyte E32-DTU(900L300)-V8 User manual

E32-DTU (900L30)-V8

Chengdu Ebyte Electronic Technology Co.,Ltd. E32-DTU (900L30)-V8_User Manual_EN
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd I
Content
1. Introduction ................................................................................................................................................................ 1
1.1. Brief Introduction ............................................................................................................................................1
1.2. Features ........................................................................................................................................................... 1
2. Operation .................................................................................................................................................................... 2
3. Installation Specifications .......................................................................................................................................... 4
3.1. Structure .......................................................................................................................................................... 4
3.2. Dimension ....................................................................................................................................................... 6
4. Interface Defination ....................................................................................................................................................7
4.1. Power interface definition ............................................................................................................................... 7
4.2. RS232 Interface definition .............................................................................................................................. 7
4.3. RS485 Interface definition .............................................................................................................................. 7
5. Technical indicators ....................................................................................................................................................8
5.1. Model specifications ....................................................................................................................................... 8
5.2. General specification parameters ....................................................................................................................8
5.3. Frequency range and channels ........................................................................................................................ 9
5.4. Transmit power level .......................................................................................................................................9
5.5. Air data rate ..................................................................................................................................................... 9
5.6. Current parameters .......................................................................................................................................... 9
5.7. Transceiver Length and Sub-packing Mode ................................................................................................. 10
6. Operating mode ........................................................................................................................................................ 10
7. Program the DTU ..................................................................................................................................................... 11
7.1. diagrammatic drawing ...................................................................................................................................11
7.2. Parameter setting instruction .........................................................................................................................12
8. Connection diagram in test and application .............................................................................................................13
9. Related Products .......................................................................................................................................................13
10. Practical application ............................................................................................................................................... 14
11. Precautions for Use ................................................................................................................................................ 15
Revision history ............................................................................................................................................................16
About us ........................................................................................................................................................................16

Chengdu Ebyte Electronic Technology Co.,Ltd. E32-DTU (900L30)-V8_User Manual_EN
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd II
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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.

Chengdu Ebyte Electronic Technology Co.,Ltd. E32-DTU (900L30)-V8_User Manual_EN
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd 1
1. Introduction
1.1. Brief Introduction
E32-DTU(900L300)-V8 is a wireless data transceiver of 868M with standard RS232/RS485 connectors. They are
half-duplex. TX & RX modems with LoRa technology and transparent transmission mode. Voltage supply ranges from
8V to 28V, Working frequency: 862-930MHz (Default:868MHz).
The LoRa direct sequence spread spectrum technology enables the longer communication distance and better power
density concentration as well as superior anti-interference ability. The FEC algorism enables higher coding efficiency and
correction ability. The interfered data packets will be corrected proactively upon sudden interference, which significantly
improves reliability and communication distance. Without FEC, the interfered data packet will be dropped. The
transceivers feature data encryption and compression. The data transmitted in air features randomness, the rigorous
algorism makes data interception meaningless. The data compression function has possibility to reduce the data
transmission time, which in turn reduces the possibility of being interfered, thus improves the reliability and
communication efficiency.
1.2. Features
All core components are originally imported, our transceiver modems have much advanced functions with smaller
size and lower cost.
The top TX power is 100mW, all technical parameters meet 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.
Aluminum alloy case, compact size, great heat dispersion; good shielding, prime electromagnetic compatibility and
strong anti-interference.
Power reverse & overload protection and antenna surge protection functions significantly improve the reliability.
Parameters can be configured by programming, such as TX power, frequency point, air data rate, address and so on.
Ultra-low power consumption, standby current is only 39mA (even lower under power-saving and sleep modes), TX
current ≤0.7A .
Embedded watch-dog and precise time layout, modem will restart automatically upon abnormal situation and work
with previous parameters.
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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Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd 2
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.
2、Using USB-(RS232) converter or USB-RS(485) converter or other way to link computer and DTU.
3、Firing up two XCOMs, choosing Baud rate 9600bps, 8N1, the setting which serial port transmission can be

Chengdu Ebyte Electronic Technology Co.,Ltd. E32-DTU (900L30)-V8_User Manual_EN
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achieved.
4、User needs to open the mode switch first before link DTU with computer if the user want to modify parameters.
Firing up to configuration Tool modify related parameters. The mode switch must be reopened to achieve
transmission after the configuration.

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Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd 4
3. Installation Specifications
3.1. Structure
Pin
NO.
Name
Function
Description
1
DB-9 female socket
RS-232 interface
Standard RS-232 interface
2
3.81 terminal block
RS-485, power interface
Standard RS-485 interface and pressure line
power interface
3
PWR-LED
Power LED
Red, lit when the power is on

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4
TXD-LED
Transmit LED
Yellow, blinks when sending data
5
RXD-LED
Receive LED
Yellow, blinks when receiving data
6
DC power interface
Power interface
In-line round hole, outer diameter 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
Unit：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 choose any one of the power supply is OK;
DTU can use 8~ 28V DC power supply, but it is recommended to use 12V or 24V DC power supply.
4.2. RS232 Interface definition
The DTU can be connected to the device via RS-232 using the standard DB-9 interface.
4.3. RS485 Interface definition
DTU can connect the 485_A terminal and 485_B terminal with the device RS-485 A terminal and B terminal.
★
Pin NO.
Definition
Function
Description
1
VCC
Crimping power interface, positive
8 ~ 28V DC, recommended 12V or 24V
2
GND
Crimping power interface, negative
The power supply negative pole is connected to
the system ground and the housing