What Is an NPort (Serial Device Server)?


Serial Device (RS-232/485)
Serial
NPort
Ethernet
Edge Network (Monitoring)

NPort serial device servers connect serial-based industrial equipment to Ethernet networks. It enables remote access to PLCs, meters, sensors, and other critical devices across industrial environments. This approach helps organizations extend the usability of existing serial infrastructure while improving accessibility and network integration. The NPort G2 Series also supports modern OT requirements related to cybersecurity, compliance, and operational efficiency.


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Why Choose NPort G2?

Modern industrial networks require more than stable communication. Security, compliance, and operational visibility are now fundamental requirements for industrial connectivity.

A Long-term Commitment to Your Edge

Long-term product stability is critical for industrial operators who manage infrastructure that is expected to remain operational for many years. Powered by Moxa’s self-developed ASIC, the NPort G2 Series helps reduce supply-chain dependency while supporting long-term product availability for industrial communication networks.

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See NPort G2 Series in Action


NPort G2 Built-in Web Console Demo

Built-in web console

The NPort G2 and MGate web-based consoles are accessible from standard web browsers without additional software installation. Real-time traffic visibility and integrated diagnostic tools help engineering teams locate communication problems more efficiently and simplify troubleshooting during commissioning and maintenance activities. One-click system log export also supports faster reporting and maintenance documentation.

NPort G2 Security Checks Demo

7 security checks: Is your edge network equipped for cyber threats?

Industrial cybersecurity requirements continue to expand as OT networks connect more devices and remote infrastructure. This video discusses seven common security situations industrial operators should evaluate, including weak passwords, firmware tampering risks, unsecured data transmission, unauthorized network access, missing audit tracking, and authentication scalability challenges. These scenarios provide practical guidance for improving security across industrial edge networks.





NPort MB3170/3270/3470-G2 Series
IEC 62443-4-2 SL2 Certified

NPort 6100/6200-G2 Series

1- and 2-port secure terminal servers with enhanced centralized authentication and encryption, ideal for protecting compact and mission-critical infrastructure nodes.

NPort MB3170/3270/3470-G2 Series
IEC 62443-4-2 SL2 Certified

NPort 6400-G2 Series

4-port secure terminal servers with hardware-level security and data encryption, designed to protect localized multi-device cabinets against cyber threats.

NPort MB3170/3270/3470-G2 Series
IEC 62443-4-2 SL2 Certified

NPort 6600-G2 Series

8-, 16-, and 32-port high-density secure terminal servers with robust encryption and centralized management, built for large-scale industrial deployments.

NPort MB3170/3270/3470-G2 Series
ATEX CID2 IECEx DNV*

NPort IA5000-G2 Series

1-, 2-, and 4-port rugged serial device servers built for harsh environments, featuring cascading Ethernet ports and industrial-grade surge protection.

*DNV certification pending approval. Refer to the product datasheet for the latest certification status.




Where NPort G2 Gets Used

Place after the NPort G2 product cards (6100/6200-G2, 6400-G2, 6600-G2, IA5000-G2), before the page’s closing paragraph.

  • Plant floors: keeping remote access to legacy serial PLCs and controllers alive without ripping out field equipment
  • Utilities: encrypted, centrally-authenticated monitoring for serial metering and protection gear on sensitive segments
  • Transit and outdoor infrastructure: wide-temperature, ruggedized units built for exposed installs (IA5000-G2 line)
  • Large process plants: consolidating dozens or hundreds of serial connections through the high-density 6600-G2 line (8/16/32 ports)
  • Regulated OT environments: centralized login control and HTTPS/SSH encryption to meet IEC 62443-4-2 SL2 requirements



Common Questions About NPort G2

1. How does NPort G2 differ from G1 in practice??

The headline changes are IEC 62443-4-2 SL2 certification, centralized login management, HTTPS/SSH encryption, roughly 40% lower latency, and diagnostics you can run in one click instead of digging through logs.


2. Which NPort G2 lines carry the SL2 security certification?

The 6100/6200-G2, 6400-G2, and 6600-G2 series all carry it, which matters if your OT security policy requires certified edge devices.


3. Can one unit handle RS-232, RS-422, and RS-485?

Yes, the 3-in-1 models in the G2 line (the 6650-G2, for example) support all three on the same hardware, so the interface choice is made at install time, not at order time.


4. What's the right model for a hazardous-area install?

Yes. It’s built to IEC 62443-4-2 at Security Level 2 (SL2), which is the bar most OT security policies now expect from edge devices.


5. Is there a straightforward way to find the G2 equivalent of a specific G1 unit?

    Yes, the Migration Map already on this page maps each G1 model to its G2 successor, including the cases where one G1 unit now maps to a new model or a two-product combination.




    Serial infrastructure doesn’t need to be replaced to be brought up to current standards — it needs a device server that can sit between it and a modern, audited network. That’s the case for NPort G2: it protects the investment already made in serial field equipment while closing the security and visibility gaps that older device servers weren’t built to handle. Talk to the ManuAuto technical team about picking the right model or working through your G1-to-G2 migration map.