Detailed Explanation of SR500 Dual Ethernet 4G Router InterfacesThe SR500 Dual Ethernet 4G Router is a powerful industrial-grade IoT device that integrates various network access technologies and rich interfaces. This article will detail the main interfaces of the router and their functions, helping users fully understand and utilize this product.

industrial 4G router-sr500

1. Ethernet Interfaces

The SR500 router is equipped with two 10/100Mbps adaptive Ethernet interfaces, labeled as LAN1 and LAN2. These interfaces have the following features and functions:

• MDI/MDIX auto-adaptation: No need to consider straight-through or crossover cables, as it can automatically adjust to suit the type of connected device.
• Flexible configuration: LAN1 port can be configured as a WAN port for wired broadband access.
• Dual port advantages: a) Network expansion: Can connect more local devices such as switches, cameras, etc. b) Network isolation: Can divide the two interfaces into different network segments for network security isolation. c) Load balancing: When configured as dual WAN, it can achieve traffic sharing and improve network reliability.

These Ethernet interfaces provide users with flexible network topology options, suitable for both Internet access and local network construction, meeting the needs of various application scenarios.

1. 4G Antenna Interface

The SR500 router is equipped with an SMA female inner hole interface for connecting 4G antennas. This interface has the following characteristics:

• Impedance matching: Standard 50-ohm impedance, ensuring signal transmission efficiency.
• Universality: Compatible with most standard SMA interface antennas on the market.
• High-frequency performance: Supports all 4G LTE frequency bands, with transmission rates up to CAT4 level.

The importance of the 4G antenna interface is reflected in:

• Signal quality: Appropriate antennas can significantly improve signal strength and stability.
• Coverage range: By selecting antennas with different gains, the signal coverage range can be adjusted.
• Interference resistance: High-quality antennas can improve anti-interference ability, especially in complex electromagnetic environments.

Users can choose suitable antenna types based on the actual installation environment, such as omnidirectional antennas, directional antennas, or suction cup antennas, to obtain the best 4G network performance.

1. SIM Card Interface

The SR500 adopts a drawer-style SIM card slot design, supporting standard SIM cards and small UIM cards. The main features of this interface include:

• Voltage compatibility: Supports both 1.8V and 3V SIM/UIM cards, adapting to different carriers and different generations of SIM cards.
• Anti-fall design: The drawer structure ensures that the SIM card is not easily loosened in harsh environments.
• ESD protection: Built-in 15KV ESD protection, effectively preventing static damage.

The importance of the SIM card interface:

• Network access: It is key to 4G network connection, determining the device’s network identity and access permissions.
• Flexible replacement: Convenient for users to change SIM cards from different carriers based on network coverage or tariff plans.
• Security: Physical card slot design is more secure compared to embedded SIMs, less susceptible to remote tampering.

1. Console Interface

The SR500 is equipped with a 5-pin 3.5mm pitch Console interface, integrating 1 RS232 and 1 RS485 port. The main functions and advantages of this interface include:

• Device debugging: Direct access to the device’s command-line interface via RS232 for system configuration and troubleshooting.
• Data acquisition: RS485 interface can connect various industrial sensors and control devices for data collection and remote control.
• Protocol conversion: Supports Modbus RTU to Modbus TCP function, facilitating traditional serial devices to access IP networks.
• High interference resistance: Built-in 15KV ESD protection, suitable for use in industrial environments.

The importance of the Console interface:

• Local management: Device management can still be performed through the Console port when network failures occur.
• Industrial integration: Provides a convenient data interface for industrial automation, smart manufacturing, and other fields.
• Protocol bridging: Achieves seamless connection between traditional serial communication and modern IP networks.

1. Power Interface

The SR500 provides two power input methods:a) DC power socket: 2.1mm inner core interface, compatible with standard 12V 1A power adapters. b) Power terminal: 2-pin 3.81mm pitch connector, supporting 5-36V wide voltage input (expandable to 5-60V).The advantages of this dual power design:

• High adaptability: Can choose the most convenient power supply method according to the installation environment.
• Wide voltage input: Adapts to different industrial site power supply conditions, improving device versatility.
• High reliability: Supports redundant power design, enhancing system reliability.

The importance of the power interface:

• Stable operation: Appropriate power supply is the foundation for stable device operation.
• Overload protection: Built-in overvoltage and overcurrent protection, improving device safety.
• Flexible deployment: Wide voltage input characteristics allow the device to be deployed in various complex environments.

1. Wi-Fi Antenna Interface (Optional)

For models supporting Wi-Fi functionality, the SR500 is also equipped with a 2.4G Wi-Fi antenna interface:

• Interface type: SMA inner hole interface, 50-ohm impedance.
• Frequency band support: 2.4GHz, compatible with 802.11b/g/n standards.
• Maximum rate: Supports wireless transmission rates up to 150Mbps.

The importance of the Wi-Fi interface:

• Local access: Provides convenient network access points for mobile devices.
• Network extension: Can act as a Wi-Fi repeater to expand network coverage.
• Backup link: Can be configured as a backup internet access method, improving network reliability.

1. Reset Button

The SR500 has a physical Reset button for device reset. Its main functions include:

• Soft restart: Short press to restart the device without power off.
• Restore factory settings: Long press to restore the device to factory default configuration.

The importance of the Reset button:

• Fault recovery: When device configuration errors lead to inaccessibility, recovery can be achieved through Reset.
• Security mechanism: Physical reset method prevents illegal remote resets.

1. Indicator Lights

The SR500 is equipped with 8 LED indicator lights, namely Power, System, LAN1, LAN2, SIM, Online, WIFI, and 3G/4G. The functions of these indicator lights:

• Intuitive feedback: Quickly understand the working status of various parts of the device.
• Fault diagnosis: Assist users in preliminary fault judgment and location.
• Operation monitoring: Real-time monitoring of key states such as network connection and data transmission.

The importance of the indicator light system:

• Simplified maintenance: Understand basic operational status without logging into the device.
• Improved efficiency: Quickly identify problems, reducing fault diagnosis time.

ConclusionThrough its rich and professional interface design, the SR500 Dual Ethernet 4G Router fully demonstrates its advantages as an industrial-grade IoT device. From stable network connections, flexible power supply options, to rich data interfaces and user-friendly management functions, each interface is carefully designed to meet the needs of various complex application scenarios.These interfaces not only ensure the device’s high performance and reliability but also provide users with great flexibility and scalability. Whether for remote monitoring in harsh industrial environments or deploying large-scale IoT applications in smart transportation and smart cities, the SR500 can provide powerful support through its diverse interfaces.By thoroughly understanding and properly utilizing these interfaces, users can fully exploit the potential of the SR500, building secure, efficient, and reliable IoT solutions, providing strong support for the digital transformation of various industries.