Ebyte E90-DTU-V8 User manual

E90-DTU (433L33)-V8

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

Content

Content ............................................................................................................................................................................ I

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. Related Products .......................................................................................................................................................13

9. Practical application ................................................................................................................................................. 13

10. Precautions for Use ................................................................................................................................................ 14

Revision history ............................................................................................................................................................16

About us ........................................................................................................................................................................16

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

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

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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.

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

1. Introduction

1.1. Brief Introduction

E90-DTU(433L33)-V8 is a wireless data transceiver of 433M 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: 410~441MHz (Default:433MHz).

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 28mA (even lower under power-saving and sleep modes), TX

current ≤0.2A .

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.

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

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-(RS485) 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. E90-DTU (433L33)-V8_User Manual_EN

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.

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

3. Installation Specifications

3.1. Structure

NO.

Name

Function

Description

DB-9 female socket

RS-232 interface

Standard RS-232 interface

3.81 terminal block

RS-485, power interface

Standard RS-485 interface and pressure line

power interface

PWR-LED

Power LED

Red, lit when the power is on

TXD-LED

Transmit LED

Yellow, blinks when sending data

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

RXD-LED

Receive LED

Yellow, blinks when receiving data

DC power interface

Power interface

In-line round hole, outer diameter 5.5mm,

diameter 2.5mm

DIP switch

Controlled by working mode

Antenna interface

SMA-K interface

external thread, 10mm, 50Ωcharacteristic

impedance

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

3.2. Dimension

Unit：mm

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU (433L33)-V8_User Manual_EN

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

VCC

Crimping power interface, positive

8 ~ 28V DC, recommended 12V or 24V

GND

Crimping power interface, negative

The power supply negative pole is connected to

the system ground and the housing

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