Product Overview

The Foxboro X440-G2-24FX-GE4 RH102AN Ethernet Switch is a high-density managed Ethernet switch designed for industrial communication networks, Distributed Control Systems (DCS), process automation, and other applications where reliable network connectivity is essential.

The RH102AN is based on the X440-G2 managed switch platform and provides 24 fixed 100BASE-FX fiber-optic ports with LC connectors, together with four 1000BASE-X SFP uplink ports. This combination makes the switch suitable for building fiber-based industrial Ethernet networks while providing additional Gigabit connectivity for network expansion and backbone connections.

In a typical Foxboro control architecture, the switch can provide communication between control processors, operator stations, engineering workstations, remote I/O systems, servers, and other Ethernet-based equipment. Fiber communication is especially useful in large industrial facilities because it supports longer transmission distances and provides strong immunity to electromagnetic interference.

The supplied physical dimensions of the Foxboro X440-G2-24FX-GE4 RH102AN are 440.94 × 43.94 × 254.25 mm, with an approximate weight of 3.93 kg. Its 1U rack-mount form factor makes it suitable for installation in industrial communication cabinets and standard equipment racks.

Technical Specifications

Function and Working Principle

The primary function of the X440-G2-24FX-GE4 RH102AN is to provide managed Ethernet communication between multiple industrial devices.

The switch receives Ethernet frames from connected devices, identifies the destination address, and forwards the data through the appropriate network interface. This intelligent forwarding mechanism helps reduce unnecessary traffic and improves overall network efficiency.

A simplified industrial communication structure can be represented as:

Engineering Workstation

↓

Industrial Ethernet Switch

↓

DCS Controller

↓

Remote I/O

↓

Field Devices

The 24 fixed fiber ports provide the main fiber-optic communication interfaces, while the four Gigabit SFP ports can be used for higher-speed uplinks or connections between network switches.

The switch therefore performs several important functions:

• Ethernet packet forwarding
• Fiber-optic network connectivity
• Network segmentation
• Traffic management
• Network monitoring
• Communication diagnostics
• Industrial network expansion
• Redundant network support

Because the device is managed rather than simply functioning as an unmanaged switch, engineers can configure and monitor network behavior according to the requirements of the control system.

What Is the Foxboro X440-G2-24FX-GE4 RH102AN Used For?

The Foxboro X440-G2-24FX-GE4 RH102AN is primarily used to establish and manage Ethernet communication within industrial automation systems.

It can be used to connect:

• DCS controllers
• Operator workstations
• Engineering stations
• Remote I/O systems
• Industrial servers
• Process historians
• SCADA equipment
• Network management equipment
• Fiber-optic network segments

The high number of fiber ports makes the switch particularly useful for larger industrial networks where multiple remote devices need to communicate through an optical Ethernet infrastructure.

Role in Industrial Control Systems

Industrial control systems depend on reliable communication between controllers and supervisory equipment.

The Ethernet switch provides the communication infrastructure that allows these devices to exchange information.

A typical network architecture can be represented as:

Operator Stations

↓

Industrial Ethernet Network

↓

X440-G2-24FX-GE4

↓

Control Processors

↓

Remote I/O Modules

↓

Sensors and Actuators

The network switch may carry different types of information, including:

• Process data
• Controller status
• Alarm information
• Diagnostic information
• Engineering configuration data
• Historical data
• Operator commands
• System monitoring information

In a large DCS installation, multiple Ethernet switches may be interconnected to create a redundant or segmented network architecture.

Fiber-Optic Communication Advantages

One of the major characteristics of the X440-G2-24FX-GE4 is its high-density fiber connectivity.

Fiber-optic communication offers several advantages in industrial environments.

Long-Distance Transmission

Fiber can be used to connect equipment separated by considerable distances without the same limitations associated with short copper Ethernet connections.

Electromagnetic Interference Immunity

Industrial plants often contain motors, variable-frequency drives, generators, transformers, and high-power electrical equipment.

These devices can create electromagnetic interference.

Fiber-optic communication is inherently resistant to electromagnetic interference, making it well suited to electrically noisy industrial environments.

Electrical Isolation

Optical communication provides electrical isolation between network segments, which can be valuable in large industrial facilities.

Stable Communication

A properly installed fiber network can provide stable and consistent communication between distributed automation systems.

Industrial Applications

The Foxboro X440-G2-24FX-GE4 can be used in a variety of industrial applications.

Oil and Gas

Large oil and gas facilities often contain geographically distributed control equipment.

Fiber Ethernet can connect:

• Central control rooms
• Process units
• Remote equipment
• Data servers
• DCS controllers

Petrochemical Plants

Petrochemical facilities require reliable communication between multiple production units and control systems.

The switch can form part of the plant’s industrial Ethernet infrastructure.

Power Generation

Power plants contain extensive control and monitoring systems.

The switch can support communication between:

• Control systems
• Operator stations
• Engineering systems
• Monitoring equipment
• Industrial servers

Chemical Processing

Chemical production facilities often operate continuously and require stable network communication for process monitoring and control.

Water and Wastewater Treatment

Distributed pumping stations, treatment equipment, PLCs, HMIs, and SCADA systems can be connected through industrial Ethernet networks.

Manufacturing

Manufacturing plants can use fiber Ethernet to connect automation equipment across production areas, especially where electrical interference or long cable distances are concerns.

Installation and System Integration

The X440-G2-24FX-GE4 RH102AN is designed for rack-mounted installation and can be installed inside industrial network cabinets or control-room communication racks.

A general installation sequence includes:

1. Verify the switch model and part number.
2. Confirm the intended network topology.
3. Install the switch into the equipment rack.
4. Secure the rack mounting hardware.
5. Connect the primary power supply.
6. Connect the fiber-optic cables.
7. Install appropriate SFP modules where required.
8. Connect Gigabit uplinks.
9. Connect the management interface.
10. Configure the network parameters.
11. Configure VLANs and other required network functions.
12. Verify port status.
13. Test communication with connected equipment.
14. Check network redundancy if applicable.
15. Save the final configuration.

The actual commissioning procedure should follow the requirements of the specific industrial network.

Fiber Installation Considerations

Fiber-optic network performance depends heavily on proper installation.

Before commissioning, engineers should inspect:

• Fiber connector cleanliness
• Fiber cable routing
• Connector type
• Optical module compatibility
• Cable bending radius
• Fiber link status
• Optical signal quality
• Port configuration

Dirty or damaged optical connectors can cause intermittent communication, packet loss, or complete link failure.

Fiber cables should also be protected from excessive mechanical stress.

Compatible System Components

The Foxboro X440-G2-24FX-GE4 RH102AN can operate as part of a larger industrial communication architecture.

The exact components used with the switch depend on the control system architecture and network design.

Network Management

Because the X440-G2-24FX-GE4 is a managed Ethernet switch, it can provide substantially more control than an unmanaged Ethernet device.

Network administrators can use management functions to monitor:

• Port status
• Network traffic
• Link condition
• Communication errors
• Network topology
• Device connectivity
• VLAN configuration
• Network redundancy
• Diagnostic information

These functions are particularly useful when troubleshooting industrial communication problems.

Routine Maintenance

Although Ethernet switches generally require less mechanical maintenance than compressor or rotating equipment, regular network inspection is still important.

Preventive maintenance can help identify developing network problems before they affect production.

Common Troubleshooting Symptoms

Troubleshooting should begin with the simplest potential causes and then progress toward configuration and network architecture.

Troubleshooting Procedure

When an industrial Ethernet network experiences a communication failure, engineers can follow a structured diagnostic process.

Step 1: Check Power

Confirm that the switch is receiving the correct power and that the system status indicators are operating normally.

Step 2: Check Port Indicators

Inspect the LEDs associated with the affected fiber or Ethernet ports.

Step 3: Inspect Fiber Connections

Check the optical connectors for contamination, looseness, or physical damage.

Step 4: Check SFP Modules

Verify that the installed optical modules are correctly seated and compatible with the network configuration.

Step 5: Check Network Configuration

Verify:

• IP configuration
• VLAN configuration
• Port settings
• Network topology
• Redundancy settings

Step 6: Test the Uplink

If multiple network devices are unavailable simultaneously, inspect the Gigabit uplink or network backbone.

Step 7: Review Network Diagnostics

Use available management and diagnostic functions to identify abnormal traffic, port errors, or communication failures.

Recommended Alternative Models

Alternative models should not be selected solely according to dimensions or port count. Engineers should verify fiber type, uplink requirements, network protocols, power configuration, management functions, and system compatibility before replacement.

Key Advantages

• High-density industrial fiber Ethernet connectivity
• 24 × 100BASE-FX fiber ports
• 4 × 1000BASE-X SFP uplink ports
• LC fiber interfaces
• Managed Layer 2 Ethernet switching
• Suitable for large industrial communication networks
• Excellent resistance to electromagnetic interference
• Supports long-distance optical communication
• Provides network management and diagnostics
• Supports industrial network expansion
• Rack-mounted 1U form factor
• Dimensions of 440.94 × 43.94 × 254.25 mm
• Approximate weight of 3.93 kg
• Suitable for DCS and process automation applications
• Compatible with industrial fiber network architectures

Technical FAQs

What is the Foxboro X440-G2-24FX-GE4 RH102AN?

The Foxboro X440-G2-24FX-GE4 RH102AN is a managed industrial Ethernet switch designed for fiber-based communication networks used in DCS and industrial automation systems.

What is the main function of the RH102AN?

Its primary function is to connect multiple industrial Ethernet devices and efficiently forward network traffic between them.

How many fiber ports does the X440-G2-24FX-GE4 have?

It provides 24 fixed 100BASE-FX fiber ports using LC connectors.

Does it have Gigabit uplink ports?

Yes. The switch provides four 1000BASE-X SFP ports that can be used for Gigabit network uplinks and network expansion.

What are the dimensions?

The supplied dimensions are:

440.94 × 43.94 × 254.25 mm

What is the weight?

The approximate weight is:

3.93 kg

Is the X440-G2-24FX-GE4 suitable for a DCS?

Yes. Its managed Ethernet architecture and fiber connectivity make it suitable for industrial DCS communication infrastructures when properly integrated into the applicable control network.

Why is fiber Ethernet useful in industrial plants?

Fiber communication provides long-distance connectivity, electrical isolation, and strong immunity to electromagnetic interference, all of which are valuable in industrial environments.

What equipment can be connected to the switch?

Depending on the network architecture, it can connect:

• DCS controllers
• Operator stations
• Engineering workstations
• Remote I/O
• Industrial servers
• Network switches
• SCADA equipment
• Fiber network segments

What should be checked if a fiber port stops communicating?

Engineers should inspect the fiber connector, cable, SFP or optical interface, port configuration, network topology, and connected equipment.

Can the switch be installed in a standard rack?

Yes. Its approximately 1U-high rack-mount form factor is suitable for standard industrial communication racks.

Is the RH102AN the same as X440-G2-24FX-GE4?

RH102AN is the Foxboro-associated part identification for the X440-G2-24FX-GE4 switch configuration.

Conclusion

The Foxboro X440-G2-24FX-GE4 RH102AN Ethernet Switch is a high-density managed industrial networking device designed for reliable fiber-optic communication in DCS and process automation environments.

Its combination of 24 × 100BASE-FX LC fiber ports and four 1000BASE-X SFP uplink ports provides a flexible foundation for large industrial Ethernet networks. The managed switching architecture enables network monitoring, traffic management, diagnostics, and scalable network integration.

With dimensions of 440.94 × 43.94 × 254.25 mm and an approximate weight of 3.93 kg, the switch is well suited to 19-inch rack and industrial cabinet installations.

The RH102AN can work together with DCS controllers, remote I/O systems, operator stations, engineering workstations, industrial servers, fiber-optic cables, SFP modules, and network security equipment. Its fiber-based architecture is particularly valuable in large facilities where communication distances and electromagnetic interference can make conventional copper networking less suitable.

For system integrators and maintenance engineers, the most important identification information is Foxboro X440-G2-24FX-GE4 / RH102AN. Before replacement or integration, the complete network architecture, optical interface requirements, uplink configuration, power arrangement, and system compatibility should be verified.

Overall, the Foxboro X440-G2-24FX-GE4 RH102AN provides a reliable and scalable communication foundation for industrial Ethernet networks, helping connect distributed control equipment while supporting the stable data exchange required by modern process automation systems.