Ebyte E34-DTU, 2G4H20 User Manual

E34-DTU (2G4H20)

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

Content

1.Introduction............................................................................................................................................ 2

1.1.Brief Introduction .......................................................................................................................... 2

1.2.Features........................................................................................................................................ 2

2.Operation ................................................................ ............................................................................... 3

3.Installation Specifications................................................................................................ ......................... 5

3.1.Structure....................................................................................................................................... 5

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 ......................................................................................................... 8

5.4.Transmit power level................................................................ ...................................................... 9

5.5.Current parameters ........................................................................................................................ 9

5.6.Transceiver Length and Sub-packing Mode....................................................................................... 9

6.Operating mode ...................................................................................................................................... 9

7.Connection diagram when programming .................................................................................................. 10

7.1.diagrammatic drawing .................................................................................................................. 10

7.2.Parameter setting instruction ................................................................ ..........................................11

8.Connection diagram in test and application ................................ ............................................................... 12

9.E32-DTU series .................................................................................................................................... 13

10.Practical application................................................................ ............................................................. 13

11.Note................................................................ ................................................................................... 14

12.Important statement ............................................................................................................................. 15

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

1.Introduction

1.1. Brief Introduction

E34-DTU (2G4H20) is a full duplex wireless data transmission module for point-to-point transmission( Has both RS232 and RS485), transmission power is 100mW, transparent transmission mode, working in 2400MHz band high-performance 2.4g wireless module, UART serial port interface, transparent transmission, at the same time support

3.3v or 5.0v system, packet loss automatic retransmission, support automatic frequency hopping, anti-interference ability is very strong.

E34-DTU (2G4H20) in order to ensure the secrecy and anti-interference of communication, compared with fixed-frequency communication, frequency-hopping communication is more covert and difficult to be intercepted. Support address function, host can transmit data to any address of any channel module, network relay and ot her applications; The air speed is high, so the transmission speed is fast, the delay is small and the data throughput is large. It is especially suitable for applications requiring small delay and large data volume, such as real-time remote control with good anti-interference ability. Even if some frequency points are interfered, it can still carry out normal communication on other frequency points that are not interfered, and it has been mass produced and widely used in related industries

E34-DTU (2G4H20) is Strictly abided by domestic and foreign design specifications such as FCC CE and CCC, meet various rf related certification, and meet export requirements

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℃, applicab le 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 25.5mA (even lower under power -saving and sleep modes), TX

current ≤0.14A .

★ Embedded watch-dog and precise time layout, modem will restart automatically upon abnormal situation and work with previous parameters. ★ The transceivers adopt original nRF24L01P+ chip, customers highly comment the products because of the super reliability.

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

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.

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

3、 Firing up two XCOMs, choosing Baud rate 9600bps, 8N1, the setting which serial port transmission can be

achieved.

4、 User needs to open the mode switch first before link DTU with computer if the user want to modify parameters.

Firing up E34-DTU 数传电台配置软件 (E34-DTU parameter configuration application) to modify related parameters. The mode switch must be reopened to achieve transmission after the configuration.

Mode 0 Default Mode 3 Parameter setting

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

3. Installation Specifications

3.1. Structure

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

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

Controlled by working mode

8

Antenna interface

SMA-K interface

external thread, 10mm, 50Ωcharacteristic impedance

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

3.2. Dimension

Unit：mm

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

4. Interface Defination

4.1. Power interface definition

Users can choose ⑥ DC 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;

E34-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 E34-DTU can be connected to the device via RS-232 using the standard DB-9 interface.

4.3. RS485 Interface definition

E34-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

10~ 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

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 the device interface A

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

★ 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

Frequenc

y

Transmit

power

Distance

Specifications

Application

Hz W km

E34-DTU（2G4H20)

2400

0.1

2

Automatic frequency

hopping, automatic packet

loss retransmission

Suitable for open environment

with few 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.

5.2. General specification parameters

NO.

Model

Specification

Description

1

Size（H*W*D）

82 * 62 * 25mm

See more at 3.2 Dimension

2

Weight

131g

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

5.3. Frequency range and channels

Model

Default frequency

Frequency range

Channel

spacing

Channels Hz

Hz

E34-DTU（2G4H20）

2400 MHz

2400 ~ 2518 MHz

MHz

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.

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

5.4. Transmit power level

Mode

1.3mW

5mW

25mW

100mW

E34-DTU（2G4H20)

√ √ √

√

★ 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. Current parameters

Model

Transmitting current mA

Standby current mA

12V

24V

12V

24V

E34-DTU（2G4H20)

143

86

25.5

32

★ Note: It is recommended to retain more than 50% of the current margin when selecting the power supply, which w ill help the data transceiver to work steadily for a long time.

5.6. Transceiver Length and Sub-packing Mode

Model

Buffer

Sub-package

E34-DTU（2G4H20)

256Byte

Automatic subcontracting of 27 bytes to send

★ 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 cannot receive data which is more than the buffer capacity;

6. Operating mode

E34-DTU(2G4H20) 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

Mode 0

Normal Mode

ON

Open UART and RF，transparent transmission is on

Mode 1

Wake-up Mode

ON

OFF

Air wake-up mode, the packet comes with a wake-up code,

Mode 2

Power-saving Mode

OFF

ON

The air wake-up receive mode, saving receive power, the mode can not be transmitted

Mode 3

Sleep Mode

OFF

Parameter setting using the configuration software

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

★ 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.

7. Connection diagram when programming

7.1. diagrammatic drawing

Mode

M1

M0

Description

Mode 3

Sleep Mode

Off

Only be programmed using the configuration software in the current mode

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

★ 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 E34-DTU 数传电台配置软件 (E34-DTU parameter configuration application) to modify parameters.

7.2. Parameter setting instruction

Parameter

Description

Baud rate

The serial port baud rate of a wireless data station at work，1200bps～115200bps。

Odd-even check

Support 8N1:no check ；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 transmission speed, transmission of the same data time delay is small, but the transmission distance will become shorter. 64kbps is the most recommended value

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

Transmitting power

In order to ensure the working efficiency, it is recommended to use the maximum power. If the transmitted power is reduced, the communication distance will become shorter and the required current will be reduced

FEC

The lost or interfered data can be partially corrected by complex encoding, which can improve the equivalent receiving sensitivity by about 3dBm. Turning off this function can reduce the communication delay.

Transmission mode

Transparent transmission, and send-as-received fixed points, broadcasting is not supported

Wake Up Time

There is no direct relationship with the communication delay. If the customer needs low-power applications, this option shall be adjusted as required to ensure the communication stability. This parameter is self-adaptive and needs no attention from the user.

IO driven

By default, select the internal TTL signal drive mode。

Station Address

Internal address of wireless data station, stations with the same address as those independent 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 the working frequency of wireless data transmission station. Each channel corresponds to its different working frequency. Theoretically, different frequency channels cannot communicate with each other.

8. Connection diagram in test and application

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

9. E32-DTU series

Mode No.

Interface

Frequency Hz

Tx power

dBm

Distance

km

Function feature

E34-DTU(2G4H27)

RS232 RS485

2.4G

27

5

Automatic frequency hopping, automatic packet loss retransmission

E34-DTU (2G4D20)

RS232 RS485

2.4G

20

2

Full duplex, two-way simultaneous transmission.

E34-DTU (2G4H20)

RS232 RS485

2.4G

20

2.5

Automatic frequency hopping, automatic packet loss retransmission

10. Practical application

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:

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

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 ensure stable communication, it is recommended to reserve at least 50 % of the communication distance.

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 support@cdebyte.com for support.

11. When choosing power supply, it is recommended to keep at least 50% current left and the ripple must not exceed

100mV.

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

12.Important statement

1. CDEBYTE reserves the right of final interpretation and modification of all the contents of this 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;

Chengdu Ebyte Electronic Technology Co.,Ltd. E34-DTU (2G4H20) user manual

Revision history

Version

Date

Description

Issued by

1.00

2018/8/30

Initial version

huaa

1.10

2019/4/2

M odel No. split

molly

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

------------------------------------------------------------------------------------------------Fax: 028-64146160 ext. 821 Web: www.ebyte.com Address: Innovation Center D347, 4# XI-XIN Road,Chengdu, Sichuan, China

Ebyte E34-DTU, 2G4H20 User Manual

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