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

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
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)

Show Images

	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
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	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