Chengdu Ebyte Electronic Technology Co., Ltd.
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co., Ltd.
2
1. Introduction
1.1 Brief introduction
E90-DTU (400SL22P) is a true high-quality industrial-grade wireless digital radio. The power supply supports
3-level protection, RS485 and RS232 support 4-level protection, and the RF port supports 4-level ESD protection. It can
be used in industrial applications where the electromagnetic environment is more complicated. The radio adopts LORA
spread spectrum technology, and its powerful anti-interference ability makes wireless communication more stable and
reliable in the industrial field.
It has multiple transmission modes, working in the (410.125 ~ 493.125MHz) frequency band (default 433.125MHz),
the radio provides transparent RS232/RS485 interface, 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. The module has 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 actively correct the
interfered data packets, greatly improving reliability and transmission distance. In the absence of FEC, such packets can
only be discarded. The radio has data encryption function, and the data transmitted by the radio in the air has randomness.
The data interception is meaningless through strict encryption and decryption algorithms; the packet length setting is
supported, and different real-time and data packets are supported.
As a communication medium, wireless digital radio 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 and installation and maintenance. Convenient, strong diffraction ability, flexible network
structure and long coverage. It is suitable for multi-point and location dispersion, complex geographical environment, etc.
It can be connected with PLC, RTU, rain gauge, liquid level meter and other data terminals.
1.1.1 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
：
CNEx18.1461.
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.
