NPort 6400-G2 Series

2nd Gen 4-port RS-232/422/485 secure terminal servers

moxa-nport-6400-g2-series-image-1-(1).jpg | Moxa

moxa-nport-6400-g2-series-image-2-(1).jpg | Moxa

moxa-nport-6400-g2-series-image-3-(1).jpg | Moxa

moxa-nport-6400-g2-series-image-4-(1).jpg | Moxa

moxa-nport-6400-g2-series-image-5-(1).jpg | Moxa

moxa-nport-6400-g2-series-image-6-(1).jpg | Moxa

Features and Benefits

Data encryption with secure operation modes for Real COM, TCP Server, TCP Client, Pair Connection, Terminal, and Reverse Terminal
Secure Boot only allows Moxa-authorized firmware to run on devices
One-click log collection and application analysis for easy troubleshooting
Easy RS-485 configuration of serial interfaces with software-adjustable pull high/low resistor and terminator
Supports SSL certificate signing by RSA-4096 / ECC-521
IEC 62443-4-2 Security Level 2 certified

Certifications

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Introduction

Moxa has leveraged the IEC 62443-4-1 secure development life-cycle process to develop a new generation of secure terminal servers. The NPort 6400-G2 Series secure terminal servers are also IEC 62443-4-2 Security Level 2 certified, enabling secure connections for your legacy serial devices to industrial networks. In addition, user experience is enhanced based on Moxa’s 35 years of experience in the serial-connectivity field by providing versatile installation means for different space requirements and an easy-to-use troubleshooting tool for maintenance.

Secure Data Transmission

For many applications, guaranteeing secure data transmission is an important concern when connecting serial devices to a network. To answer this concern, the NPort® 6400-G2 secure terminal servers support the TLS and SSH protocols, which work by encrypting data before sending it over the network. With the NPort® 6400-G2, you can be rest assured that serial data is transmitted securely over both private and public networks.

One-click Logs and Application Analysis for Easy Troubleshooting

During the deployment stage, system integrators must connect devices and ensure the communication is smooth. They may encounter issues and will require tools to troubleshoot issues. Moxa provides a application analyzer that generates a report at the click of a button to help the system integrator easily identify potential issues and understand how to resolve them.

At the maintenance stage, system errors may require you to call for help. Device vendors might take a long time to troubleshoot issues because they need to collect information and then hold discussions with the technical support team. The NPort 6400-G2 comes with a one-click log collection function, which can provide all the data that a technical support team needs to quickly troubleshoot system issues.

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SD Slot

microSD card
Up to 2 TB (high speed, 25 Mbps)

10/100BaseT(X) Ports (RJ45 connector)

1 to 3
Auto MDI/MDI-X connection
Magnetic Isolation Protection

1.5 kV (built-in)

Configuration Options

Web Console (HTTP/HTTPS)
Windows Utility
Device Search Utility (DSU)
MCC Tool
Serial Console
Management

ARP
DHCP Client
DNS
HTTPS
ICMP
IPv4/IPv6
SMTP
SMTPS
SNMPv1/v2c/v3
SNTP
TCP/IP
UDP
WINS
Windows Real COM Drivers

Windows 11, 10, 8.1, 8, and 7
Windows Server 2022, 2019, 2016, 2012 R2, 2012, and 2008 R2
Linux Real TTY Drivers

Kernel versions 6.x, 5.x, and 4.x
Fixed TTY Drivers

macOS versions: 14, 13, 12, and 11
Arm®-based Platform Support

Windows 11
Linux kernel 6.x, 5.x, and 4.x
macOS 14, 13, 12, and 11
Virtual Machine

VMWare ESXi (Windows 11/10/8.1/8/7 & Linux 6.x, 5.x, and 4.x)
VMware Fusion (Windows on macOS 14, 13, 12, and 11)
Parallels Desktop (Windows on macOS 14, 13, 12, and 11)
Time Management

SNTP Client
MIB

MIB-II
RFC1213, RFC1317
Private MIB
Unicast Routing

RIPV1/V2
Static Route

Root of Trust

Secure Boot
True Random Number Generator (TRNG)
Security Screws
Authentication

Local database
RADIUS
TACACS+
Security Protocols

HTTPS (TLS 1.2/1.3)
SNMPv3
SSHv2
Encryption

HTTPS: ECC-256, ECC-384, ECC-521, RSA-1024, RSA-2048, RSA-3072, RSA-4096, AES-128, AES-256, CHACHA20, SHA-256, SHA-384, HMAC

SSH: ECC-256, ECC-384, ECC-521, RSA-2048, AES-128, AES-256, SHA-256, SHA-384, HMAC

SNMPv3: AES-128, SHA-256, SHA-384

Secure OP mode: HTTPS: ECC-256, ECC-384, ECC-521, RSA-1024, RSA-2048, RSA-3072, RSA-4096, AES-128, AES-256, CHACHA20, SHA-256, SHA-384, HMAC

Config Import/Export: AES-256, SHA-256, HMAC

No. of Ports

4
Connector

DB9 male
Serial Standards

RS-232
RS-422
RS-485
Secure Operation Modes

Reverse SSH
Secure Pair Connection
Secure Real COM
Secure TCP Client
Secure TCP Server
SSH
Secure Redundant COM, Secure Reverse Real COM
Standard Operation Modes

Disabled
Pair Connection
SLIP
PPP
Real COM
Reverse Terminal
RFC2217
TCP Client
TCP Server
Terminal
UDP
Redundant COM, Reverse Real COM
Baudrate

50 bps to 921.6 kbps (supports non-standard baudrates)
Data Bits

5, 6, 7, 8
Stop Bits

1, 1.5, 2
Flow Control

None
RTS/CTS
DTR/DSR
RTS Toggle
XON/XOFF
Parity

None, Even, Odd, Space, Mark
RS-485 Data Direction Control

Automatic Data Direction Control (ADDC)
Terminator for RS-485

120 ohms
(software–configurable)
Pull High/Low Resistor for RS-485

1 kilo-ohm, 150 kilo-ohms
(software–configurable)

RS-232

TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
RS-422

Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w

Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w

Data+, Data-, GND

Input Current

373 mA (max.)
Input Voltage

12 to 48 VDC

Automatic Reboot Trigger

Built-in WDT
Alert Tools

Built-in buzzer and RTC (real-time clock)

Housing

Metal
Dimensions (with ears)

158 x 114.4 x 30 mm (6.22 x 4.5 x 1.18 in)
Weight

NPort 6450-G2: 538 g (1.186 lb)
NPort 6450-2TX-G2: 546 g (1.204 lb)
NPort 6450-G2-T: 522 g (1.151 lb)
NPort 6450-2TX-G2-T: 530 g (1.168 lb)
NPort 6450-2M/-2S-SC-G2-T: 535 g (1.179 lb)
Weight (including package)

NPort 6450-G2: 900 g (1.984 lb)
NPort 6450-2TX-G2: 908 g (2.002 lb)
NPort 6450-G2-T: 690 g (1.521 lb)
NPort 6450-2TX-G2-T: 698 g (1.539 lb)
NPort 6450-2M/-2S-SC-G2-T: 705 g (1.554 lb)
Installation

Desktop
DIN-rail mounting (with optional kit)
Wall mounting

Operating Temperature

Standard models: -10 to 60°C (14 to 140°F)
Standard models with power adapter (in the box): 0 to 40°C (32 to 104°F)
Wide temp. models: -40 to 75°C (-40 to 167°F)
Storage Temperature (package included)

-40 to 75°C (-40 to 167°F)
Ambient Relative Humidity

5 to 95% (non-condensing)

EMC

EN 55032/35
EMI

CISPR 32, FCC Part 15B Class A
EMS

IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
IEC 61000-4-5 Surge: Power: 1 kV
IEC 61000-4-6 CS: 3 V
IEC 61000-4-8 PFMF
IEC 61000-4-11
Safety

IEC 62368-1
UL 62368-1
EN 62368-1
Traffic Control

NEMA TS2
Vibration

IEC 60068-2-6
Package Drop Test

ISTA 1A

Green Product

RoHS, CRoHS, WEEE

Time

NPort 6450-G2: 29,716 hrs
NPort 6450-2TX-G2: 29,713 hrs
NPort 6450-2M-SC-G2-T: 2,664,201 hrs
NPort 6450-2S-SC-G2-T: 2,664,201 hrs
Standards

Telcordia Standard SR-332
Telcordia SR-332 Issue 4

Warranty Period

5 years
Details

See www.moxa.com/warranty

Download datasheet

Software, Firmware, and Drivers

Name	Type	Checksum	Version	Operating System	Release Date
Private MIB for NPort 6000-G2 Series 248.3 KB	Software Package	9DF7B9AF8B4562DC55914FF20BA93627A18964B0626374AE0DAB1453345C950106137DD53C4CDCBC4F0BD465B2E877212B1B0B092013F11B45EDAFB6B3DDEC84 SHA-512	v1.1.0		Jan 28, 2026 Jan 28, 2026 Release notes
Firmware for NPort 6000-G2 Series 4.3 MB	Firmware	87E7EB968C27089F917C0EDBD14A6BCFE29BBE336083A47FC8B74B5119B683005321FA0D9A4D3E91DD092ACC5920D4C2E813EE8F778A6254F842E51AF84A0A28 SHA-512	v1.1.0		Jan 28, 2026 Jan 28, 2026 Release notes
Real TTY Linux Kernel 5.x Driver 640.0 KB	Driver	9C925123FC5EC5EAF116D853E363A6E7BB649535FB608C21D79E7E3BD0011ED25DC41D0E078318D1A51D82AF6EA1DC9BF64DC7A7F62F171792392AABF2ECE99F SHA-512	v5.6	Linux Kernel 5.x	Jan 22, 2026 Jan 22, 2026 Release notes
Real TTY Linux Kernel 6.x Driver 2.5 MB	Driver	237F77E2F40BCA7D51F88942ACD49C96AA5328E9C34A61261E950042E08C2E1406221321BB315258BF2AB1FC8304E19D3BC495949BDB960E1C68964C1C9F330B SHA-512	v6.2	Linux Kernel 6.x	Jan 22, 2026 Jan 22, 2026 Release notes
Moxa Edge Device Library 12.5 MB	Library	6F25C5F23C1AD6F796168FB1792C7D400C89878224C097907ED4E7795D2513E2E964BD153473B0AECFE4468A1BE5C162F962810ED59D7A9911F78E65A15B7943 SHA-512	v1.0	Windows	Jan 22, 2026 Jan 22, 2026 Release notes
Real TTY Linux Kernel 4.x Driver 650.0 KB	Driver	13A0FC2ECD89DB144B494586D5268E630A0F612A0AB23E3407A1EBDA86DD2CA80D14AE8970FD3D9D96784555043361113D75ABC52F5C85A312C02A962872D0EB SHA-512	v4.4	Linux Kernel 4.x	Jan 22, 2026 Jan 22, 2026 Release notes
Moxa Windows Driver Manager (Windows 11 and Server 2022 and later, WHQL certified) 11.9 MB	Driver	BA32BA788191ADABE0FFE9ABE42A00117EE845DBF2B69561C594D26290BB401B1F8EF8F08B1798E920A1F6A484F32E17ADB4FFF52CB093A080398C4AEE821494 SHA-512	v4.5	Windows 11 Windows Server 2022 Windows Server 2025	Jan 09, 2026 Jan 09, 2026 Release notes
Moxa Windows Driver Manager (Windows 7 to 10 and Windows Server 2008 R2 to 2019, WHQL certified) 12.2 MB	Driver	4844B332A6A26E4D96FE04099891F53CE327E08CAAD5EF7E4CABDD1831C0B38432D8DCB208DCAAB67F182F8EABC134064D92F179B1ABB0B8FEB7B5FAF0F54AD7 SHA-512	v3.8	Windows 10 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019	Jan 09, 2026 Jan 09, 2026 Release notes
PComm Lite - Serial Communication Tool 5.3 MB	Utility	ACF1A369B77608C2E443644FC767D1F35F8C36FE88FA2720FE3E9896B32FF7054F299AC2042F491CFDEA3674E90917D4702B648412D3CE0CE2714778F9EF8FE1 SHA-512	v1.9	Windows	Dec 12, 2025 Dec 12, 2025 Release notes
Device Search Utility (portable) 128.6 MB	Utility	728BA6AE2F8A19FEE90E5E89B67E72BBEC0CF70A6343D897B839B2A5BB897B19B7ECD9FDBCFEB412207F0536AC82E4B7923F25E86B5C1EC8F6592F1BC494BD3D SHA-512	v3.1	Windows 10 Windows 11 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025	Nov 17, 2025 Nov 17, 2025 Release notes
Device Search Utility (installer) 236.2 MB	Utility	46BFBEF375C5A5A231CDFBFEBCC30E1847BDAB75BDBD882E681528558AB696F43ED8B14BA7BF199EEF60625FDECF4C21A63FD20E0D0D735246EBC27B10C2399D SHA-512	v3.1	Windows 10 Windows 11 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025	Nov 17, 2025 Nov 17, 2025 Release notes
MXview One plugin (Windows) 22.6 MB	Software Package	2A35C603BDC83AD15BC1E3D82E899EA8B7D87E441C8C47A00115DE15B85F2EB1CC364973F43DFA82728A83568A6483DB757E2AF6F30541C82B9F4375A6BF6F7E SHA-512	v1.8	Windows 10 Windows 11 Windows Server 2016 Windows Server 2019 Windows Server 2022	Oct 01, 2025 Oct 01, 2025 Release notes
MXview One plugin (Linux) 21.7 MB	Software Package	9A6C5240A83B60A2C6FC6715645A6501BEDF612402573FF17ABA15479882B4AF2C7F781FB59819E06AA185ED690EAC73FE6A6CC2A03D5CB44FE50756BF75D075 SHA-512	v1.8	Ubuntu 18.04 Ubuntu 20.04 Ubuntu 22.04	Oct 01, 2025 Oct 01, 2025 Release notes
Moxa CLI Configuration Tool (Linux) 11.6 MB	Utility	4003D7F9F6F7DC5F64893018AAE59AF552AAEDEEB0C917A7FD0279C5536AA0566F621F1625C3F96EE718284F78CAEA76C4D56E67C999797B88E6DBE5AA80B5B5 SHA-512	v1.5	Linux Kernel 2.6.x Linux Kernel 3.x Linux Kernel 4.x Linux Kernel 5.x Linux Kernel 6.x	Aug 05, 2025 Aug 05, 2025 Release notes
Moxa CLI Configuration Tool (Windows) 2.0 MB	Utility	EA861EBB97AAE1349475A0A620F19C7D56CD83866CC24F22D971830522BC92F59DC6BF71BD65933A5A6BDBECEC55F67F436DEE5827202085BC54904DB156D3A8 SHA-512	v1.5	Windows 10 Windows 11 Windows 7 Windows 8 Windows 8.1 Windows Server 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019	Jul 30, 2025 Jul 30, 2025 Release notes
Serial Device Server Driver for macOS (macOS 11.x to 14) 6.3 MB	Driver	91948DC612A34FDCFAA923230297736427FB8217C04496AFB919C92099D2F9073F583B9334D8D0A8636CF4AA4D47767CF06E93AA9450C4A64CA77B4E6F14F417 SHA-512	v1.3	macOS 11 macOS 12 macOS 13 macOS 14	Sep 02, 2024 Sep 02, 2024 Release notes

Support Documents

Name	Type	Version	Release Date
Datasheet for NPort 6400-G2 Series 1.2 MB	Datasheet	v1.1	Jan 28, 2026 Jan 28, 2026
Tech Note: The Security Hardening Guide for the NPort 6000-G2 Series 1.1 MB	Tech Note	v1.1	Jan 22, 2026 Jan 22, 2026
Manual for NPort 6000-G2 Series 16.9 MB	Manual	v1.2	Jan 22, 2026 Jan 22, 2026
QIG for NPort 6400-G2 Series 2.1 MB	QIG	v1.0	Dec 30, 2025 Dec 30, 2025
Device Search Utility v3.x User Manual 2.8 MB	Manual	v1.1	Nov 17, 2025 Nov 17, 2025
FOSS Statement for Moxa PComm Lite Suite for Windows 108.5 KB	Declaration	v1.0	Feb 07, 2025 Feb 07, 2025
FOSS Statement for Moxa CLI Configuration Tool 114.6 KB	Declaration	v1.0	Dec 10, 2024 Dec 10, 2024
FOSS Statement for NPort macOS driver 108.4 KB	Declaration	v1.0	Oct 29, 2024 Oct 29, 2024
FOSS Statement for Device Search Utility 161.8 KB	Declaration	v1.0	Jun 24, 2024 Jun 24, 2024
FOSS Statement for Moxa Windows Driver Manager 255.8 KB	Declaration	v1.0	Aug 01, 2022 Aug 01, 2022
FOSS Statement for Moxa Linux Driver 1.7 MB	Declaration	v1.0	May 01, 2022 May 01, 2022

Available Models (6)

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	Compare NPort 6450-G2	Compare NPort 6450-2TX-G2	Compare NPort 6450-G2-T	Compare NPort 6450-2TX-G2-T
Ethernet Ports	1 x 10/100M RJ45	3 x 10/100M RJ45	1 x 10/100M RJ45	3 x 10/100M RJ45
No. of Serial Ports	4	4	4	4
Serial Standards	RS-232/422/485	RS-232/422/485	RS-232/422/485	RS-232/422/485
Power Adapter Included?	✓	✓	–	–
Operating Temp.	-10 to 60°C	-10 to 60°C	-40 to 75°C	-40 to 75°C
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	Compare NPort 6450-2S-SC-G2-T	Compare NPort 6450-2M-SC-G2-T
Ethernet Ports	1 x 10/100M RJ45 2 x 100M Single-mode SC	1 x 10/100M RJ45 2 x 100M Multi-mode SC
No. of Serial Ports	4	4
Serial Standards	RS-232/422/485	RS-232/422/485
Power Adapter Included?	–	–
Operating Temp.	-40 to 75°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag