EPEVER RTU 4G A GPRS Transmission Terminal

1. Important Safety Instructions

• Read the instructions and warnings in the manual carefully before installation.
• The product should be situated away from the rain, exposure, dust, vibration, corrosion, and intense electromagnetic environment.
• Please avoid water and other liquids entering the product.
• Never use the product at sites where electrostatic could occur, and avoid the antenna close to a metal object.
• DO NOT disassemble or attempt to repair the product.
• Power supply: DC 9~60V or 5V, it can be customized according to customers' requirements.
• Enable GPRS service for the SIM card before installation.

2. Overview

EPEVER RTU 4G A is a new wireless data transmission terminal based on the 4G network. With the GSM/GPRS SIM card, the connected devices can easily access the EPEVER cloud server to realize remote, wireless, and networked communication. EPEVER RTU 4G A is suitable for EPEVER solar controller, inverter, and inverter/charger.

Features:

• Extensive network coverage and flexible networking
• Low operating costs (charged by network flow)
• Adopt a non-standard DB9 male terminal
• Embedded in Modbus RTU protocol
• Automatic restore after disconnection
• Support RS485 communication

3. Appearance

Components:

• 1. Antenna port
• 2. Hole (for indicators)
• 3. DB9 male connector
• 4. Fixing screws

DB9 Male Connector Pin Definition: The pin definition of the terminal (DB9 female) connected to the DB9 male terminal 3 is as follows:

Indicators: You can observe the indicators' color and status through the hole 2.

[Note] The EPEVER RTU 4G A supports 5~18V DC power. While a larger transient current is needed when the wireless network sends the data, it is suggested to adopt a power adapter of DC 5V/500mA or above.

4. Parameter Configuration

Step 1: Connect the DB9 male connector 3 to the PC through a DB9 to USB adapter.

[Note] Connect an external power adapter to the DB9 female terminal to supply the EPEVER RTU 4G A.

Step 2: Insert the SIM card and power on the EPEVER RTU 4G A. For detailed SIM card installation, refer to chapter 6, Installation.

Step 3: Open the configuration tool on the PC and click the "connect" button to connect the EPEVER RTU 4G A successfully.

Step 4: Click the "Read" and "Write" buttons to configure the parameter.

Step 5: After configuring, power on the product again to make the modified parameters take effect.

Common configuration parameters:

5. System Connection

EPEVER RTU 4G A can be applied to the following solar street light systems. Through a 2G/3G/4G signal, users can easily monitor the operating status and modify the related parameters on the Cloud platform.

One-To-One connection: [Description: A diagram showing a single EPEVER device, such as RTU 4G A, connecting to a solar controller or inverter, which then communicates via GPRS to a central Data Centre.]

One-To-more connection: [Description: A diagram illustrating multiple EPEVER devices (e.g., RTU 2G A, RTU 4G A, WIFI, LoRa) connecting to various solar controllers/inverters, all communicating via GPRS to a central Data Centre.]

After adding the device into the Cloud platform successfully, log in to the cloud platform (https://iot.epsolarpv.com), remotely monitor the real-time condition or set the parameters.

[Note] For new accounts, devices need to be manually added in the EPEVER cloud before monitoring.

6. Installation

Step 1: Install the SIM Card

• Purchase a SIM card and activate the GPRS service.
• Undo the three screws from the EPEVER RTU 4G A.
• Push the shell upward and take out the circuit board.
• Take out the small SIM card and insert it into the card slot correctly. [Detail: Insert the SIM card in the indicated direction.]
• After installing successfully, reinstall the product shell.

Step 2: Install the silicone pad

• Tear off the silicone pad's adhesive and stick the silicone pad to the DB9 terminal of the EPEVER RTU 4G A.

Step 3: Install the antenna

• Connect the 4G antenna to the antenna port of the EPEVER RTU 4G A.

[Caution] As a wireless terminal, keep the antenna away from the human body as far as possible during the operation process.

Step 4: Connect the controller

• Connect the terminal to the controller's com. port through a DB9 adapter.

7. Applications

According to different applications, the cloud platform provides two networking connection methods: "one-to-one" and "one-to-more." Controllers can be added into the system convenient and flexible by the two methods. Users can remote control or real-time monitor the controller through the cloud platform.

Specifications:

8. Troubleshooting

9. Dimension

[Description: A technical drawing showing the physical outline of the EPEVER RTU 4G A unit with key dimensions labeled. It indicates the position of the antenna port at the top and the DB9 connector at the side. Approximate dimensions are: Height ~91mm, Width ~92.3mm, Depth ~39mm.]