[Antenna Interface] : SMA-K
[Size] : 84*82*25mm
[Interface] : RS232/RS485
[Weight] : 133±5g
[Feature] : Wide coverage,Support multiple network protocols
[Introduction] : E840-DTU(NB-03) is a NB-IoT DTU produced by Ebyte. It features a certain scope of applications which cover most common application scenarios.
| 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 | 115200 bps | - |
| Max. Transmitting power | 23dBm ± 2dB | - |
| Sensitivity | -129dBm ± 1dB | - |
| Dissipative Flows（typical） | Idle Mode(Idle): 18.4mA | - |
| Working voltage | DC 5V~36V | - |
| 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 | Network transmission mode, cloud platform working mode |
| 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. |
| Pin No. | Name | Description |
| 1 | RS232 | RS232 interface |
| 2 | 485_A | Side A of external interface for other RS485 devices |
| 3 | 485_B | Side B of external interface for other RS485 devices |
| 4 | GND | Ground electrode |
| 5 | VCC | Power supply，default: 5~36V |
| 6 | PWR | Power indicator |
| 7 | WORK | UART communication indicator |
| 8 | NET | Net working indicator |
| 9 | DC-IN | 5~36V |
| 10 | RST | Reset switch(downward, reset) |
| 11 | Restore | Restore factory settings switch(downward, 5-10S) |
| 12 | SIM | SIM card slot |
| 13 | ANT | Antenna interface(SMA-K, 50Ω) |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://www.aliexpress.com/store/2798183 |
| 【Alibaba】：https://www.alibaba.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| Model | Interface | Transmission protocol | AT command | TCP/UDP | Package | Size(mm) | Feature | Manual | Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| E840-DTU(EA01) | RS232 RS485 | NB-IoT | - | - | support | support | screwing/DB9 | 82*84*24 | two-way transparent data transmission | ||
| E840-DTU(4G-02E) | RS232 RS485 | 4G | - | - | Support | Support | DB9 | 84*82*25 | Realize two-way data transparent transmission from serial port to network | ||
| E840-TTL-4G02E | UART | 4G | - | - | Support | Support | Screwing | 42*40*9.7 | Whole network，TCP/UDP | ||
| E840-DTU(NB-03) | RS232 RS485 | NB-IoT | - | - | - | - | Screwing/DB9 | 82*84*25 | Wide coverage,Support multiple network protocols | ||
| E840-TTL-NB03 | UART | NB-IoT | - | - | Support | Support | Screwing | 42*40*9.7 | AT mode,TCP/UDP | ||
| E840-TTL-GPRS03 | UART | GPRS | - | - | Support | Support | Screwing | 42*40*9.7 | Supporting quad-frequency | ||
| E840-DTU(GPRS-03) | RS485/RS232 | GPRS | - | - | Support | Support | Screwing | 84*82*25 | Supporting quad-frequency, AT command set | ||
| E840-DTU(GPRS-01) | RS485/RS232 | GPRS | - | - | Support | Support | Screwing | 84*82*25 | Supporting quad-frequency, AT command set | ||
| E840-DTU(NB-02) | RS232 RS485 | NB-IoT | - | - | - | - | Screwing/DB9 | 82*84*25 | Low power consumption,customization |
