QUECTEL RG255C-GL M.2 5G Sub-6 GHz Module User Manual

1. Introduction

The QUECTEL RG255C-GL M.2 is an advanced 5G Sub-6 GHz M.2 module designed for global connectivity. It integrates 3GPP Release 17 RedCap technology, offering robust 5G Standalone (SA) mode capabilities with 4G LTE fallback. This module is equipped with a Global Navigation Satellite System (GNSS) receiver, providing precise positioning. Its versatile interfaces, including PCIe and USB 2.0, make it suitable for a wide range of RedCap applications requiring medium speed, large capacity, low latency, and high reliability.

2. Safety Information

Please read and understand all safety precautions before installing or operating the module. Failure to follow these instructions may result in injury, damage to the product, or other hazards.

• Ensure proper electrostatic discharge (ESD) precautions are taken during handling and installation to prevent damage to sensitive electronic components.
• The module operates within specified temperature ranges. Do not expose the module to temperatures outside of its operating range (-30°C to +75°C) or extended temperature range (-40°C to +85°C).
• Only use the specified power supply voltage (3.135-4.4 V, typical 3.7 V) to power the module. Incorrect voltage can cause permanent damage.
• Installation should be performed by qualified personnel familiar with M.2 module integration.
• Do not attempt to disassemble or modify the module. This will void the warranty and may cause damage or malfunction.

3. Product Overview

3.1 Key Features

• M.2 form factor for easy integration.
• Worldwide 5G/LTE coverage.
• 5G SA mode with features like 5G LAN*, URLLC, and Slicing.
• Multi-constellation GNSS receiver (GPS, GLONASS, BDS, Galileo, NavIC) for accurate positioning.
• Supports DFOTA (Delta FOTA) and VoNR/VoLTE (Optional).
• PCIe 2.0 interface for Wi-Fi/Bluetooth connectivity.
• Theoretical peak data rates: 223 Mbps (DL) / 123 Mbps (UL) in 5G SA Sub-6, and 195 Mbps (DL) / 105 Mbps (UL) in LTE.

3.2 Physical Description

The RG255C-GL M.2 module is a compact M.2 form factor card. Below are images illustrating its appearance.

4. Setup and Installation

The RG255C-GL M.2 module is designed for integration into host devices with an M.2 slot. Follow these general steps for installation:

1. Prepare the Host Device: Power off your host device (e.g., laptop, industrial PC) and disconnect it from all power sources. Open the device casing to access the M.2 slot.
2. Handle with Care: Always handle the module by its edges to avoid touching the gold contacts or components. Use an anti-static wrist strap to prevent ESD damage.
3. Insert the Module: Align the notch on the RG255C-GL M.2 module with the key in the M.2 slot. Gently insert the module into the slot at a 30-degree angle.
4. Secure the Module: Once fully inserted, push the module down towards the motherboard and secure it with the retaining screw provided by your host device manufacturer.
5. Connect Antennas: Connect the cellular antennas to the appropriate connectors on the module (Cellular: x2). If using GNSS, connect the optional GNSS antenna (GNSS: x1). Ensure connections are secure.
6. Close the Device: Carefully close the host device casing and re-connect power.

4.1 Driver Installation

After physical installation, drivers may be required for the operating system to recognize and utilize the module. Drivers are available for:

• USB Serial Driver: Linux 2.6-6.7; Android 4.x-13.x
• RIL Driver: Android 4.x-13.x
• USB NCM Driver: Linux 3.10-6.7
• USB RNDIS Driver: Windows 8.1/10/11; Linux 2.6-6.7
• USB Gobinet Driver: Linux 2.6-6.7
• USB WWAN Driver: Linux 3.4-6.7

Please refer to the Quectel website or your host device manufacturer for the latest drivers and installation instructions specific to your operating system.

5. Operating Instructions

Once the module is installed and drivers are in place, the RG255C-GL M.2 module will function as a network adapter and GNSS receiver for your host system.

5.1 Network Connectivity (5G/4G)

• Insert a valid USIM card into the designated slot(s) on the host device or module adapter.
• The module supports 5G SA (Standalone) mode and will automatically connect to available 5G Sub-6 GHz networks.
• In areas without 5G coverage, the module will fall back to 4G LTE networks.
• Network settings and connection management will typically be handled through your operating system's network interface or specific application software.

5.2 GNSS Functionality

• The integrated GNSS receiver supports GPS, GLONASS, BDS, Galileo, and NavIC.
• For optimal performance, ensure the optional GNSS antenna is connected and has a clear view of the sky.
• Positioning data can be accessed via standard GNSS APIs or applications on your host system.

5.3 Voice and Advanced Features (Optional)

If your module variant supports Voice over New Radio (VoNR) or Voice over LTE (VoLTE), and Digital Audio, these features can be enabled and configured through appropriate software interfaces or AT commands. DFOTA (Delta Firmware Over-The-Air) functionality allows for remote firmware updates.

6. Maintenance

The QUECTEL RG255C-GL M.2 module is designed for reliable operation with minimal maintenance. However, consider the following:

• Firmware Updates: Periodically check the Quectel website for firmware updates. Updates can improve performance, add features, or address security vulnerabilities. Utilize DFOTA if supported and configured.
• Driver Updates: Keep your operating system drivers for the module updated to ensure compatibility and optimal performance.
• Physical Inspection: If the host device is opened for other maintenance, visually inspect the module and antenna connections for any signs of damage or loose connections.
• Cleaning: Do not attempt to clean the module directly with liquids. If necessary, use a soft, dry, anti-static brush or compressed air to remove dust from the host device's interior.

7. Troubleshooting

If you encounter issues with your RG255C-GL M.2 module, try the following troubleshooting steps:

• Module Not Detected:
  • Ensure the module is correctly seated in the M.2 slot and secured.
  • Verify that the host device's M.2 slot is enabled in the BIOS/UEFI settings, if applicable.
  • Check device manager (Windows) or lsusb/lspci (Linux) to see if the module is recognized.
  • Reinstall or update the necessary drivers.
• No Network Connection:
  • Ensure a valid and active USIM card is inserted correctly.
  • Verify that the cellular antennas are securely connected.
  • Check network settings in your operating system.
  • Confirm that you are in an area with 5G or 4G LTE coverage.
  • Contact your mobile network operator to ensure your USIM card and plan support 5G/4G data.
• Poor GNSS Performance:
  • Ensure the optional GNSS antenna is connected and has an unobstructed view of the sky.
  • Avoid operating the device in areas with strong electromagnetic interference.
• Overheating:
  • Ensure adequate ventilation for the host device.
  • Verify that the ambient temperature is within the module's operating range.

If problems persist, consult the Quectel technical support resources or your device manufacturer.

8. Specifications

The following table details the technical specifications of the QUECTEL RG255C-GL M.2 module.

*Note: Theoretical only; actual values depend on network conditions. Under development/in progress. Supported. Optional. TBD: To be determined.

9. User Tips

Based on general usage patterns for similar modules, here are some tips for optimizing your experience:

• For best signal reception, ensure external antennas are positioned optimally and away from obstructions or other electronic interference.
• When integrating into custom systems, pay close attention to power supply stability and thermal management to ensure long-term reliability.
• Regularly check the Quectel official website for updated documentation, application notes, and software tools that can assist with development and deployment.

10. Warranty and Support

For warranty information and technical support, please refer to the official Quectel website or contact your point of purchase. Keep your purchase records for warranty claims.

Official Quectel Website: http://www.quectel.com

Email: info@quectel.com