Ebyte E90-DTU User manual

Chengdu Ebyte ElectronicTechnology Co.,Ltd
j.
Wireless Modem
User Manual
E90-DTU(230SL30)
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Chengdu Ebyte Electronic Technology Co., Ltd.

Chengdu Ebyte Electronic Technology Co., Ltd.
E90-DTU SL User Manual
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EBYTE
1. Introduction
1.1 Brief introduction
E90-DTU (230SL30) is a data transceiver with military-grade LoRa modulation technology. With multiple transmission modes, it
works in the (220.125-236.125MHz) frequency band (default 230.125MHz). The transceiver provides transparent RS232/RS485
interface and 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. It features 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 proactively correct the interfered data packets, greatly improving reliability and transmission distance. In the absence of FEC,
such packets can only be discarded. It has data encryption. The data transmitted by the transceiver over the air is random, and the data
interception is meaningless through strict encryption and decryption algorithms. Packet length setting is available to support different
real-time and data packets.
It works in the ISM 230MHz band with a communication distance of up to 5km. As a communication medium, wireless data
transceiver 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, installation and maintenance. It is convenient,
has strong diffraction ability, flexible networking structure and long coverage. It is suitable for occasions with many points and
scattered, complex geographical environment, etc. It can be connected with PLC, RTU, rain gauge, liquid level meter and other data
terminals.
1.1. Certificate
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:
CNExl8.1461.
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.
1.2. Features
★ All core components are imported, featuring the most advanced functions, the smallest volume and the best price.
★ 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, adapt to Modbus.
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E90-DTU SL User Manual
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★ 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.
★ 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 0 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, the standby current is only 10mA (lower than power consumption in power-saving mode and sleep
mode), and the transmitting current is <0.1 A.
★ 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.
2. Quick Start
You need to prepare items below,
1, First install the antenna for device, then install the power supply, and ensure that the dial switch is in the correct state. The user can
select the crimping method or the power adapter to supply power according to the requirements.;
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E90-DTU SL User Manual
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2, C onnect the DTU to computer via USB to RS-232 or USB to RS-485 converter etc.;
3, S tart two serial port debugging assistants, select the baud rate 9600bps, check mode as 8N1 to realize transparent transmission;
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4. I f customer needs to modify the parameters, please dial the switch in the configuration mode and connect to the computer. Open the
E90-DTU SL configuration software, you can modify the relevant parameters. After completing the configuration, you must restore the
DIP switch status for communication.
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Mode 0 Factory default Mode 2 Parameter configuratio
3. Dimensions
3.1. Parts description
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E90-DTU SL User Manual
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No. Name
Function
Note
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 DIP switch Controlled by working mode
8
Antenna interface SMA-K interface
external thread, 10mm, 50£2characteristic
impedance
3.2. Dimensions
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485_B
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Unit: mm
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4. Interface definition
4.1. P ower interface
Users can choose © DC power interface,using the power adapter supply with the interface of the 5.5mm outer
diameter , 2.5mm diameter ;
Also users can choose the VCC and GND terminal power supply from (D , both are optional;
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 be connected to the 485 A terminal and 485 B terminal from (D with the RS-485 A terminal
and B terminal of other device respectively.
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
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
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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 120£2 resistor between 485 A terminal and 485_B.
5. Technical specification
5.1. Model specification
Model No.
Frequency TX power Distance
Features
Recommended application
Hz mW km
E90-DTU(230SL30) 230.125M 1000 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
82 * 62 * 25 mm See more in 3.2. Dimensions
2
Weight
130g
±4.5 g
3
Temperature
-40°C ~ 85°C
Meet industrial request
4
Antenna
impedance
50 n
Standard 50 fi 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
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E90-DTU SL User Manual
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5.3. F requency and channel numbers
Model No.
Default Frequency Frequency Range Channel Interval
Channel numbers
Hz Hz Hz
E90-DTU(230SL22)
230.125M 220.125-236.125MHz
250k
65, 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. T ransmitting power
Model No. 30dBm 27dBm 24dBm 21 dBm
E90-DTU(230SL30) V V V V
★ 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. A ir data rate
Model
Default
Levels
Air data rate (bps)
bps bps
E90-DTU(230SL30) 2.4k 7
0.3, 0.6, 1.2, 2.4, 4.8, 9.6, 15.6k
★ Note: The higher the air data rate, the faster the transmission rate, the transmission distance is also closer; when
the rate meets the requirements , the lower air data rate, the better quality.
5.6. C urrent
Model
TX current mA Standby current mA
12V 24V 12V 24V
E90-DTU(230SL30) 276 141 21
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.
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5.7. TX and RX FIFO and sub-packing method
Model No. Buffer
Sub-packing method
E90-DTU(230SL30) 1000 bytes
Can be sub-packed to 32/64/128/240 byte each time via
command
★ Noted. 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
00 03 04 AA BB
Target address Target channel Data
Address Channel
No output
No output
Address Channel
6.2 Broadcast Transmission
: F FF04 AA BE
Address Channel Data
' ' I
Address Channel
No output
Address Channel
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