Chengdu Ebyte Electronic Technology Co.,Ltd
E90-DTU(400SL44) User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd
6
4. Interface definition
4.1 Power interface
Users uses the crimping method to supply power, 12V / 10A DC power supply.
4.2 RS232
E90-DTU can be connected to the device via RS232 using the standard DB-9 interface.
4.3 RS485
E90-DTU can use A, B, G of RS485 interface and A, B, G of equipment's RS485 respectively.
Note: When the radio is connected to multiple devices, communication is not smooth, but it is not the case with a
single device. Please try to connect a 120 ohm matching resistor in parallel between the 485_A and 485_B terminals.
5. Technical specification
5.1 Model specification
Model No.
Frequency
TX power
Distance
Features
Recommended application
Hz
W
km
E90-DTU(400SL44)
433.125M
25
40
LoRa,
anti-interference
Suitable for long distance and
susceptible environments
Note: Test condition: in clear and open air without shelters, 12V /10A 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
160*137*44mm
See chapter 3.Size for details
2
Weight
846.2g
Weight tolerance 4.5g
3
Temperature
-40
℃～
+85
℃
Meet the needs of industrial grade use
