[Interface]：RS485
[Working voltage]：DC 8V～28V
[Installation method]：guide rail + positioning hole
[Size]：102*28*27mm
[Product weight]：40g
[Introduction]：E840-DTU (EC05-485)E is a small-sized 4G DTU developed by Chengdu Ebyte Electronic Technology Co., Ltd. using 4G CAT1 technology for use in the Asia-Pacific region, Australia, New Zealand and other regions. It has small size, high speed, low latency It is low cost and easy to use. Simple configuration can realize the serial port device networking function (two-way transparent transmission between the serial port device and the network server). The product uses 2.54 spring crimp terminals and supports installation on guide rails and positioning holes. Simple configuration can realize the serial port networking process, which is very convenient to integrate into Internet of Things projects.
| Parameter name | Parameter value | Description |
| Characteristic parameters | Support frequency band | LTE-TDD: B34/B38/B39/B40/B41 |
| LTE-FDD: B1/B3/B5/B8 | ||
| Network protocol characteristics | Support TCP/UDP/MQTT/HTTP/DNS protocols | |
| RF interface | SMA-K (external thread internal hole) | |
| Hardware features |
Data interface | RS485 (2.54mm spring terminal) |
| baud rate | 1200-230400, default 115200bps | |
| data bits | 8 | |
| Stop bit | 1 (default), 2 | |
| Check Digit | None (default), Odd, Even | |
| Operating Voltage | DC 8V～28V | |
| Operating temperature | -40～+85℃ | |
| Dimensions | 80*28*27mm | |
| product weight | 40g | |
| indicator light | PWR (blue) | Lights up when power is on |
| STATE (orange) | Off: The device is powered on and is searching for a SIM card; | |
| Flashing: The device has detected the correct SIM card and is attaching to the network; | ||
| Steady on: The device is successfully attached to the network; | ||
| DATA (green) | Flashing: When the serial port is sending/receiving data | |
| STATE (orange) | Steady on: The device is successfully connected to the server; | |
| Off: The device failed to connect to the server successfully; |
