Chengdu Ebyte Electronic Technology Co.,Ltd.
E32-DTU (433L20) user manual
Copyright ©2012–2021，
Chengdu Ebyte Electronic Technology Co,;Ltd
2
This manual may change with the continuous improvement of the product. Please refer to the latest version of the
instruction. Chengdu Ebyte Electronic Technology Co., Ltd. reserves all rights of final interpretation and modification of
this manual.
1.Introduction
1.1.
Brief Introduction
E32-DTU (433L20) 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: 425~450.5MHz (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.
★
The transceivers adopt original SEMTECH SX1278 chip, customers highly comment the products because of the
super reliability.
Summary of Contents for 433L20
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