| Parameter / Model | E840-DTU(EC05-485)E-V2 | E840-DTU(EC05-485)E-V2 + TX4G-JKC-19 |
|---|---|---|
| Cellular Technology | LTE Cat-1 (EC05) | LTE Cat-1 (EC05) |
| Supported Frequency Bands | LTE-TDD: B34/B38/B39/B40/B41 LTE-FDD: B1/B3/B5/B8 |
LTE-TDD: B34/B38/B39/B40/B41 LTE-FDD: B1/B3/B5/B8 |
| Target Regions | Asia-Pacific, Australia, New Zealand | Asia-Pacific, Australia, New Zealand |
| Serial Data Interface | RS485 (2.54mm Spring Terminal) | RS485 (2.54mm Spring Terminal) |
| Supported Network Protocols | TCP, UDP, MQTT, HTTP, Modbus RTU/TCP, DNS | TCP, UDP, MQTT, HTTP, Modbus RTU/TCP, DNS |
| Baud Rate Range | 1200 bps to 230400 bps (Default: 115200 bps) | 1200 bps to 230400 bps (Default: 115200 bps) |
| Operating Power Supply | DC 8V to 28V | DC 8V to 28V |
| RF Antenna Connection | SMA-K (External thread internal hole) | Includes TX4G-JKC-19 4G Antenna |
| Installation & Mounting | Standard 35mm DIN-rail + Screw holes | Standard 35mm DIN-rail + Screw holes |
| Operating Temperature | -40 to +85 degrees Celsius | -40 to +85 degrees Celsius |
| Dimensions & Weight | 80 x 28 x 27 mm, 40 g | 80 x 28 x 27 mm, 40 g (antenna excluded) |
| 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; |
Practical Application Scenarios
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Industrial PLC Remote Monitoring and Modbus Gateway Bridging
In factory automation and distributed manufacturing environments across the Asia-Pacific region, PLCs and smart power meters communicate via RS485 using Modbus RTU. The E840-DTU(EC05-485)E serves as an intelligent protocol converter that converts local Modbus RTU packet streams into Modbus TCP or MQTT over 4G Cat-1 networks. This enables central SCADA systems and cloud monitoring dashboards to query field controllers continuously without laying expensive fiber-optic cables.
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Photovoltaic Solar Farm Inverter and Weather Telemetry
In remote solar power stations where wired internet infrastructure is absent, inverter telemetry data, ambient temperature, and solar irradiance readings must be sent continuously to central energy management servers. Mounted via standard 35mm DIN-rail inside outdoor electrical cabinets, the E840-DTU(EC05-485)E utilizes cellular LTE Cat-1 networks to deliver low-latency bidirectional data telemetry while withstanding wide ambient temperature fluctuations from -40 to +85 degrees Celsius.
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Municipal Smart Water Substation and Pumping Station Remote Control
Municipal water treatment facilities often require automatic data acquisition from water quality analyzers, flow meters, and liquid level sensors across widespread urban networks. The E840-DTU(EC05-485)E accepts a wide input voltage range of DC 8V to 28V directly from industrial power rails, using standard MQTT or TCP socket connections to push sensor telemetry to cloud IoT platforms while enabling remote relay switching and maintenance commands over cellular networks.
FAQ Section
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How does LTE Cat-1 technology in the E840-DTU(EC05-485)E compare to legacy 2G/3G and NB-IoT modems for industrial serial communication?
LTE Cat-1 provides an optimal balance between medium-high bandwidth, low latency, and global cellular longevity as carriers phase out legacy 2G and 3G networks. Compared to NB-IoT, which is strictly designed for low-frequency data transmission with high latency, LTE Cat-1 offers lower latency, higher throughput, and seamless mobility support, making it ideal for real-time Modbus polling and continuous MQTT streaming from industrial RS485 equipment.
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What network reconnection and heart-beat packet mechanisms are integrated to handle cellular network dropouts?
The E840-DTU(EC05-485)E features built-in hardware watchdog and automated link detection algorithms. Users can configure customized registration packets and heartbeat packets via AT commands or the configuration software. If a cellular network drop or server disconnection occurs, the DTU automatically initiates network re-attach protocols to restore the RS485 transparent transmission session without requiring manual physical resets in the field.
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What is the primary functional difference between selecting the standalone modem and the bundle version with TX4G-JKC-19 antenna?
The standalone E840-DTU(EC05-485)E modem includes an SMA-K female RF interface designed for system integrators who already possess high-gain cabinet-mounted omnidirectional or suction-cup antennas. The bundle SKU includes the TX4G-JKC-19 high-efficiency rubber duck antenna, providing a plug-and-play solution out of the box for immediate field installation in standard industrial control boxes without sourcing third-party RF accessories.
