EBYTE E95-DTU-400F20-485 Wireless Data Transmission Radio Station User Manual

1. Introduction

The EBYTE E95-DTU-400F20-485 is a wireless data transmission radio station designed for reliable and cost-effective data communication. It operates within the 410-510MHz frequency band, with a default operating frequency of 433MHz. This device provides a transparent RS485 interface, enabling seamless integration with various industrial equipment such as PLCs, RTUs, rain gauges, and level gauges. Its robust design, featuring a flame-retardant plastic shell and guide rail installation structure, makes it suitable for diverse environments and applications requiring stable and long-distance wireless data links.

This manual provides essential information for the proper setup, operation, maintenance, and troubleshooting of your E95-DTU-400F20-485 radio station.

2. Product Features

• Operates in the 410-510MHz frequency band (default 433MHz) with 20dBm power output.
• Provides a transparent RS485 interface for versatile data transmission.
• Features a flame-retardant plastic shell and guide rail type installation structure for convenient and efficient setup.
• Supports 8-28V (DC) or 85-265V (AC) voltage input.
• Equipped with a built-in watchdog for automatic restart and stable operation in case of abnormalities.
• Designed for strong anti-interference ability and reliable data transmission in private networks.
• Utilizes hidden buttons for switching working modes to prevent accidental triggering.
• Undergoes 100% functional testing and aging tests, with a shell coated with conformal coating for anti-fungal, anti-humidity, and anti-salt spray performance.

3. Setup Instructions

Follow these steps to set up your E95-DTU-400F20-485 radio station.

3.1 Unpacking and Inspection

Carefully unpack the device and inspect it for any visible damage. Ensure all components are present.

Figure 1: Front view of the EBYTE E95-DTU-400F20-485, showing indicator LEDs for PWR, TXD, RXD, M0, and M1.

3.2 Antenna Connection

Connect the appropriate 433MHz or 470MHz antenna to the SMA-K connector labeled 'ANT' on the device. Ensure the connection is secure but do not overtighten.

Figure 2: Side view of the device, highlighting the antenna connector (ANT) and the DC power input terminals.

3.3 Power Supply Connection

Connect the power supply to the 'DC' terminals. The device supports a wide voltage input range of 8-28V DC or 85-265V AC. Ensure the correct polarity for DC connections.

3.4 RS485 Interface Connection

Connect your RS485 compatible device (e.g., PLC, RTU) to the RS485 terminals on the radio station. Observe proper A/B polarity for RS485 communication.

Figure 3: Side view of the device, showing the 'Mode' button and the RS485/RS232 interface ports.

3.5 Installation

The E95-DTU-400F20-485 is designed for guide rail installation. Securely mount the device onto a standard DIN rail in your control cabinet or enclosure.

3.6 Configuration

Initial configuration of the radio station parameters (e.g., frequency, data rate, operating mode) is typically performed via a dedicated software tool provided by EBYTE. A USB to RS485 dongle may be required for this process. Ensure you use the correct software version, such as RF_Setting V3.7 or later, for proper parameter adjustment.

4. Operating Instructions

Once properly set up and configured, the E95-DTU-400F20-485 operates as a transparent data transmission device.

4.1 Transparent Data Transmission

The radio station will automatically transmit data received via its RS485 interface wirelessly to a paired E95-DTU device, and vice-versa. Data is transmitted transparently, meaning the radio station does not modify the data content.

Figure 4: Example of a wireless transmission solution using E95-DTU devices for long-distance data transfer in industrial applications.

4.2 Working Modes

The device supports multiple working modes, which can be switched using the hidden 'Mode' button. Refer to the detailed product documentation or configuration software for specific mode functionalities and how to switch between them. This feature helps optimize performance for different application requirements.

4.3 Watchdog Functionality

The built-in watchdog feature monitors the device's operation. In the event of an abnormality or system freeze, the watchdog will automatically restart the radio station, allowing it to resume operation with its last saved parameter settings. This ensures continuous and reliable data transmission without manual intervention.

Figure 5: Illustration of the built-in watchdog and anti-crash design, ensuring stable and reliable operation.

5. Maintenance

The E95-DTU-400F20-485 is designed for minimal maintenance. Adhering to these guidelines will help ensure its longevity and reliable performance.

• Cleaning: Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning. Avoid using liquid cleaners or solvents.
• Environmental Conditions: Ensure the device operates within its specified temperature and humidity ranges. Avoid exposure to extreme temperatures, direct sunlight, or excessive moisture.
• Physical Protection: The device features a flame-retardant plastic shell and is designed to withstand various environmental challenges, including anti-fungal, anti-humidity, and anti-salt spray conditions. However, avoid physical impact or dropping the device.
• Firmware Updates: Periodically check the EBYTE official website for any available firmware updates that may improve performance or add new features. Follow the provided instructions carefully for any update procedures.

Figure 6: Internal view highlighting the robust design and conformal coating for stable and reliable performance against environmental factors.

6. Troubleshooting

This section addresses common issues you might encounter with the E95-DTU-400F20-485 radio station.

• No Power Indicator (PWR LED Off):
  • Check the power supply connection and ensure it is securely plugged in.
  • Verify that the power supply voltage is within the supported range (8-28V DC or 85-265V AC).
  • Inspect the power cable for any damage.
• No Data Transmission (TXD/RXD LEDs Not Flashing):
  • Ensure the RS485 interface is correctly wired and connected to your data terminal. Check A/B polarity.
  • Verify that the antenna is properly connected and not damaged.
  • Check the configuration parameters (frequency, data rate, operating mode) using the configuration software. Ensure they match between paired devices.
  • Confirm that the paired E95-DTU device is powered on and operating correctly.
  • Check for environmental interference that might affect wireless communication.
• Difficulty with Configuration Software:
  • Ensure you are using the correct version of the configuration software (e.g., RF_Setting V3.7 or later).
  • Verify that the USB to RS485 dongle (if used) is correctly installed and its drivers are up-to-date.
  • Check the communication port settings (COM port, baud rate) in the software.
• Device Restarts Unexpectedly:
  • This might be the built-in watchdog performing an automatic restart due to an internal anomaly. If it happens frequently, check power stability and environmental conditions.
  • Ensure the device is not overheating.
• Incorrect Power Output (e.g., expecting 30dBm but getting 20dBm):
  • The E95-DTU-400F20-485 model is specified to have a 20dBm power output. Please verify your product model number if you expected a different power level.

7. Specifications

Detailed technical specifications for the EBYTE E95-DTU-400F20-485.

Figure 7: Dimensional drawing of the E95-DTU-400F20-485, with measurements in millimeters.

8. Warranty and Support

For warranty information and technical support, please refer to the documentation provided at the point of purchase or contact EBYTE customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.