E840-DTU(NB-02) Wireless transceiver Serial to NB-IoT wireless Remote Monitoring Terminal RS232 RS485 RTU
[Antenna Interface]： SMA-K
[Size]：84*82*25mm
[Interface]：RS232/RS485
[Weight]： 133±5g
[Introduction]：E840-DTU(NB-02) can realize the communication between serial port device and network server via NB network. With simple AT command, users can easily use this product to achieve bidirectional transparent data transmission from the serial port to the network. The transparent transmission is between UART devices（referring to PC） and net sever (replaced by TCP testing tools).
| RF Parameter | Value | Remark |
|---|---|---|
| Frequency | Band5 | Receiving Frequency：869MHz~894MHz Transmitting Frequency：824MHz~849MHz |
| Hardware Features | Value | Description |
|---|---|---|
| Antenna Type | SMA-K | - |
| Interface | RS485 / RS232 | Electrical isolation, with RS485/RS232 interface |
| Baud Rate | 9600bps | Baud rate: 1200~115200, default: 9600 |
| Max. Transmitting power | 23dBm ± 2dB | - |
| Sensitivity | -129dBm ± 1dB | - |
| Dissipative Flows（typical） | PSM： 3.6uA Idle： 2mA @DRX=1.28s | - |
| Working voltage | DC 8V~28V | - |
| Working Temperature | -40℃- 70℃ | - |
| Storage Temperature | -40℃- 85℃ | - |
| Size | 82×84×25mm | - |
| Software Features | Description |
|---|---|
| Wireless Rate | SingleTone，subcarrier 15kHz and 3.75kHz：21.25kbps (downstream)， 15.625kbps (upstream). |
| Wokring Mode | Power-saving mode（PSM) Idle mode（Idle) Connection mode（Active） |
| Set Command | Abidy by 3GPP TS27.007 V14.3.0 and Quectel intensified AT command. |
| Network Protocal | Supporting multiple protocal, such as CoAP，UDP，IPv4 , LwM2M etc. |
| Device ID | Use AT command to configure Device ID. |