Moxa G2 Serial Connectivity

Modernise legacy serial and Modbus connections with secure, reliable industrial connectivity for today’s OT networks.

Moxa G2 Serial Connectivity

Modernise Legacy Serial & Modbus Connections Without Replacing Working Equipment

Moxa’s new-generation NPort and MGate G2 products help industrial sites connect existing serial, Modbus and field devices into modern OT networks, with stronger security, easier diagnostics and a more practical path for long-term upgrades.

Secure

Strengthen the communication layer around existing serial and Modbus assets.

Visible

Use improved diagnostics and traffic visibility to reduce troubleshooting time.

Practical

Upgrade the network connection while keeping reliable field equipment in place.

Moxa G2 serial connectivity product family for industrial networks

Why G2 Matters

The Upgrade is About Security, Visibility & Long-term Confidence

For many customers, the reason to consider G2 is because the demands around industrial connectivity have changed.

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Stronger OT security

Help reduce the risk around legacy device connectivity with more secure access, encrypted communication and security-focused product design for modern industrial networks.

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Faster troubleshooting

Use web-based tools, traffic visibility and easier log export to help engineers diagnose communication problems more quickly.

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Improved responsiveness

Support more responsive communication between field devices, gateways, Ethernet networks and supervisory systems.

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Clearer upgrade path

Give existing NPort and MGate users a practical route to update older installations without immediately replacing every connected device.

Supporting IEC 62443 and CRA readiness

For security-led industrial projects, selected NPort G2 models support IEC 62443-4-2 Security Level 2 requirements, helping customers align serial connectivity upgrades with stronger cybersecurity expectations and wider Cyber Resilience Act preparation.

Legacy Connectivity, Modern Networks

Keep Proven Equipment Connected as Your OT Network Evolves

Many industrial sites still rely on serial devices, Modbus equipment, meters, drives, PLCs, controllers and field assets that continue to do their job well. The challenge is connecting those devices into modern Ethernet, SCADA and OT networks securely and reliably.

Moxa G2 products help by modernising the communication layer around existing equipment. For new projects, they provide a reliable way to connect serial and Modbus devices. For existing installations, they offer a practical upgrade path from older-generation serial device servers and protocol gateways.

How G2 Fits Into the Network

1

Field Devices

Serial devices, Modbus equipment, meters, drives, PLCs and controllers.

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Moxa G2

NPort G2 connects serial devices. MGate G2 converts industrial protocols.

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Modern Systems

Ethernet networks, SCADA platforms, OT monitoring and industrial control systems.

G2 helps to create a more secure and manageable communication path between field equipment and the systems that need its data.

Keep assets in service

Continue using reliable field equipment where replacement is not needed.

Improve visibility

Make serial and protocol communication easier to monitor and diagnose.

Support modernisation

Connect legacy devices into newer Ethernet, SCADA and OT architectures.

NPort G2 vs MGate G2

Two Product Families, Two Simple Roles

NPort G2 and MGate G2 both help modernise industrial connectivity, but they solve slightly different problems.

NPort G2

For connecting serial devices to Ethernet networks.

 
  • Ideal where existing equipment communicates over serial but needs to be available on the network.
  • Useful for remote access, monitoring, data collection and serial-to-Ethernet connectivity.
  • Suitable for legacy serial devices that still work but need more secure network integration.
  • Best suited to projects where the key requirement is secure, manageable serial-to-Ethernet connectivity.

MGate G2

For converting between industrial protocols, especially Modbus serial and Modbus TCP.

 
  • Ideal where field devices, PLCs, SCADA platforms or controllers need to exchange data across different protocols.
  • Useful for Modbus integration, protocol conversion and SCADA communication.
  • Suitable for applications that need reliable data exchange across mixed legacy and Ethernet-based systems.
  • Best suited to projects where protocol conversion and dependable gateway communication are the main requirements.

Choosing G2

A More Secure Route for New Projects & Existing Installations

G2 supports both new serial connectivity projects and older installations that need a more secure, manageable route into modern OT networks.

Connect serial devices from day one

Bring RS-232, RS-422, RS-485 and Modbus equipment into Ethernet, SCADA and OT networks without replacing working field devices.

Start with stronger security

Choose a current-generation platform designed for modern industrial networks, where secure access and reliable communication are part of the specification.

Simplify setup and support

Use improved management and diagnostics to make commissioning, monitoring and fault finding easier throughout the life of the system.

Modernise without replacing everything

Keep reliable serial and Modbus equipment in service while updating the gateway or device server layer around it.

Improve visibility and control

Move older installations towards better diagnostics, clearer network visibility and more manageable device communication.

Reduce long-term maintenance risk

Standardise on a newer platform for future projects, spares, support and wider OT network upgrades.

Moxa G2 Product Range

Explore the NPort & MGate G2 Products Available from Impulse Embedded

Choose from secure serial device servers and Modbus gateways designed to help connect legacy equipment into modern industrial Ethernet, SCADA and OT networks.

NPort G2 Serial Device Servers

NPort G2 products are used where serial devices need secure, manageable connectivity over Ethernet.

  • Compact 1 and 2-port secure terminal servers for RS-232/422/485 equipment
  • DIN-rail serial device servers for industrial automation installations
  • 4-port secure terminal servers for applications with multiple serial connections
  • High-port-count 8, 16 and 32-port options for rackmount environments
Moxa NPort G2 serial device servers

MGate G2 Modbus Gateways

MGate G2 products are used where Modbus serial devices need to communicate with Ethernet, SCADA, PLC and control systems.

  • 1-port Modbus gateway range for Modbus TCP and Modbus RTU/ASCII conversion
  • 2-port Modbus gateway range for connecting multiple serial Modbus devices
  • 4-port Modbus gateway range for larger serial-to-Ethernet integrations
  • Suitable for SCADA, PLC, control system and field device communication
Moxa MGate G2 Modbus gateways

Upgrade Triggers

When Should You Consider Upgrading to G2?

G1 products may still be doing the job, but that does not always mean they are still the best fit for the next phase of an OT network.

Industrial connectivity upgrade from Moxa G1 to G2 devices
1

Cybersecurity review

A site is reviewing its OT security, access control, remote connectivity or compliance expectations.

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SCADA or PLC upgrade

The wider control system is being updated, making it a good time to review the serial and gateway layer too.

3

Communication faults

Engineers are spending too long diagnosing serial, Modbus or network communication issues.

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Long-term standardisation

A customer wants a more consistent platform for future projects, spares, support and repeat deployments.

Need Help Choosing the Right Moxa G2 Product for Your Application?

Whether you are connecting serial devices for the first time, upgrading from an older NPort or MGate installation, or reviewing your wider OT network architecture, our team can help you specify the right Moxa solution.

Call: +44 (0)1782 337 800 | Email: sales@impulse-embedded.co.uk

Our team ready to help

Frequently Asked Questions

Moxa G2 Serial Connectivity FAQs

Moxa’s G2 products are used to connect existing serial, Modbus and industrial field devices into modern OT networks. NPort G2 products are typically used for serial-to-Ethernet connectivity, while MGate G2 products are used for protocol conversion, such as linking Modbus serial devices with Modbus TCP networks. They are especially useful where existing equipment still works well, but the communication layer needs to be modernised.
In simple terms, NPort G2 connects serial devices to Ethernet networks, while MGate G2 converts between industrial protocols. NPort is usually the right product family when the main requirement is serial device access over a network. MGate is usually the better fit when the application needs protocol conversion between devices, PLCs, SCADA systems or Ethernet-based control networks.
Older serial device servers and gateways may still be working, but the expectations around industrial networks have changed. Customers are now more likely to need stronger security, easier diagnostics, better visibility, improved maintainability and a platform that is better suited to modern OT environments. G2 gives existing users a practical reason to review the serial and gateway layer, especially during wider network, SCADA, PLC or cybersecurity upgrade projects.
Not necessarily. One of the main reasons to use products such as NPort G2 and MGate G2 is to keep reliable field equipment in service while modernising how it connects to the wider network. That can be useful where devices, meters, controllers, drives or PLCs are still operational, but the site needs improved Ethernet connectivity, protocol conversion, remote access, diagnostics or security.
G2 is designed to make serial and protocol communication easier to manage in modern industrial environments. Improved web-based management, diagnostics and traffic visibility can help engineers understand what is happening at the communication layer instead of relying on guesswork. This can be particularly useful when investigating intermittent faults, device communication issues, Modbus polling problems or wider network changes.
We can help review the application, identify whether NPort G2 or MGate G2 is the better fit, and support product selection based on the connected devices, protocol requirements, port count, mounting needs, power requirements and network environment. We can also help customers compare G2 options against existing installations, plan upgrades from older products, and specify Moxa hardware as part of wider industrial networking, control panel or OT infrastructure projects.