E840-DTU(NB-03) is a NB-IoT DTU produced by Ebyte. It features a certain cope of applications which cover most common application scenarios. The user can realize bidirectional transparent data transmission from the serial port to the network server by simple setting.

E840-DTU(NB-03) supports DC and terminal power supply. Its voltage ranges from 5V to 36V. RS232 and RS485 apply electric isolation which enables anti-interrence. It is applicable in some environment with strong electromagnetic interrence like power sector.