Technical Specification - Ebyte E90-DTU User Manual

907 MHzÿ922.5 MHz
Ebyte wireless data transceiver
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Note: The transceiver will be poor communication when connecting multiple devices , while connecting a single device is not, please
try to parallel connect 120Ω resistor between 485_A terminal and 485_B.

4. Technical specification

4.1. Model specification
Frequency
Model
MHz
E90-DTU （868M20） 868
E90-DTU （915M20）
907-922.5
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Note: Test conditions: clear weather, open area, no blockage, 12V1A power, 5dBi gain sucker antenna, 2 meters above ground, default parameters
4.2. General parameters
Model
E90-DTU（868M20） 82 * 62 * 25mm
E90-DTU（915M20） 82 * 62 * 25mm
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Notes: Operating temperature: it is recommended to be lower than 70℃. Antenna impedance: standard 50Ω characteristic impedance. Voltage:
higher than max value will damage the transceiver. Communication interface: standard DB9 hole/3.81 terminal. Baud rate: 1200~115200. Address:
65536 addresses.
4.3. Frequency and Channel
Model
E90-DTU（868M20）
E90-DTU（915M20）
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Notes: When multiple pairs work in same area, please set at least 2MHz channel interval between each pair to avoid interference.
4.4. Transmitting power
Model 10mw
E90-DTU（868M20） √
E90-DTU（915M20） √
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Notes: The lower the TX power, the shorter the communication distance. The current will not decrease at equal scale. Max power is recommended.
.
TX power Distance
W km
0.1 2
0.1 2
Size Weight Temperature
131g±3g -40 ~ 85℃
131g±3g -40 ~ 85℃
Default Frequency
MHz
868
907-922.5
25mW 50mW
√ √
√ √
Features
North America band, FEC, Stable
performance
European band，FEC, Stable
performance
Impedance Voltage
50 Ω 8 ~ 28V DC
50 Ω 8 ~ 28V DC
Frequency Band
MHz
855~880.5
900~925.5
64mW 100mW
√
√
E90-DTU series user manual
Recommended applications
Applicable for living, industrial areas and open mountain
area with a few obstacles
Applicable for living, industrial areas and open mountain
area with a few obstacles
Interface Baud rate
RS232/RS485 Default 9600
RS232/RS485 Default 9600
Channel Interval
MHz
0.1
0.1
125mW 250mW 500mW
Address code
Default 0
Default 0
Channel
256，half duplex
31 ，half duplex
5W
6