Chengdu Ebyte Electronic Technology Co.,Ltd
E90-DTU(400SL44) User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd
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1. Introduction
1.1 Brief introduction
E90-DTU (400SL44) is a true high-quality industrial wireless data transceiver. The transceiver uses LORA spread
spectrum technology. Its strong anti-interference ability makes wireless communication more stable and reliable in
industrial sites.
It has multiple transmission modes, working in the (410.125
～
493.125MHz) frequency band (the default is
433.125MHz), and the radio provides a transparent RS232 / RS485 interface. LoRa Direct Sequence Spread Spectrum
technology will bring longer communication distance and has the advantage of strong anti-interference ability. The
module has 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, which greatly
improves reliability and transmission distance. Without FEC, such packets can only be discarded. The transceiver has a
data encryption function. The data transmitted by the transceiver over the air is random. Through strict encryption and
decryption algorithms, the data interception is meaningless. Packet length setting is available to support different
real-time and data packets.
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.
1.2 Features
Environmental field strength dynamic indication, data packet RSSI dynamic indication;
Dual watchdog of software and hardware;
Dust-proof and moisture-proof;
easy to use and configured by the host computer;
Warranty for 6 years;
Use the latest LoRa technology, longer distance and more powerful performance than traditional LoRa digital radio
stations;
Use military-grade LoRa modulation technology, with data encryption function, the packet length is available for
configuration.
Large single packet, single packet is up to 240 bytes;
Simple and efficient power supply design, using crimping mode, support 12V power supply;
Transmit power can reach up to 25W;
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;
Support communication key function to effectively prevent data from being intercepted;
