Chengdu Ebyte Electronic Technology Co.,Ltd
E90-DTU(400SL44) User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd
7
4
Antenna
impedance
50Ω
Standard 50 Ω characteristic impedance
5
Supply voltage
12V DC
Recommended to support instantaneous current 10A
6
Communication
interface
RS232/RS485
Standard DB9 hole / 5.08 terminal block
7
Baud rate
Factory default 9600
Baud rate range 1200
～
115200
8
Address code
Factory default 0
65536 configurable address codes
5.3 Frequency and channel numbers
Model No.
Default
Frequency
Frequency Range
Channel
Interval
Channel numbers
Hz
Hz
Hz
E90-DTU(400SL44)
433.125M
410.125
～
493.125M
1M
84
，
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 interval between each group of data transceivers at 2MHz or more.
5.4 Transmit power
Model No.
25W
E90-DTU(400SL44)
Factory default, not adjustable
5.5 Air data rate
Model No.
Default
Levels
Air data rate (bps)
bps
bps
E90-DTU(400SL44)
2.4k
8
0.3
、
1.2
、
2.4
、
4.8
、
9.6
、
19.2
、
38.4
、
62.5k
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 Current parameter
Model No.
Supply voltage V
TX current mA
Standby current
mA
E90-DTU(400SL44)
12
5500
84
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.
5.7 TX and RX FIFO and sub-packing method
