NPort S9450I Series

Features and Benefits

  • 4-port RS-232/422/485 serial interface
  • Supports up to 5 managed Ethernet switch ports (fiber ports available with some models)
  • Supports DNP3 and Modbus protocols
  • IEC 61850-3, IEEE 1613-compliant (for power substations)
  • Ethernet redundancy with Turbo Ring/Chain and RSTP/STP supported
  • Real COM/TTY drivers for Windows and Linux
  • Supports IEC 61850 MMS protocol
  • Security features based on IEC 62443/NERC CIP
  • -40 to 85°C wide operating temperature


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The NPort S9450I Series 4-port RS-232/422/485 device servers, which come with a built-in full-function managed Ethernet switch, are designed specifically for the harsh environmental conditions found in electrical substations. With both fiber and wired Ethernet ports supported, the combination of device server and Ethernet switch gives users the ability to easily install, manage, and maintain the NPort S9450I itself, as well as attached serial devices.

Electromagnetic Compatibility for Harsh Substation Environments
The NPort S9450I Series supports a high level of surge protection to prevent damage from the types of power surges and EMI one finds in electrical substations and industrial automation applications. Combined with a -40 to 85°C operating temperature range and galvanized steel housing, the NPort S9450I is suitable for a wide range of industrial environments.

Another plus is the NPort S9450I’s dual power supplies, which provide both redundancy, as well as a wide range of voltage inputs. The WV models accept a power 24/48 VDC power input (ranging from 18 to 72 VDC), and the HV models accept a power input of 88 to 300 VDC and 85 to 264 VAC.

Power SCADA With IEC 61850 MMS for Easy Maintenance
The current trend in power SCADA applications is to control and monitor both IT devices (switches, routers, etc.) and IEDs (sensors, actuators, etc.) with the MMS protocol. Contrast this with the more traditional management approach of using SNMP for IT devices and MMS for IEDs. In fact, SIs may even need to manage a variety of legacy devices that use proprietary communications protocols.

The NPort S9450I device servers are the world’s first device servers to integrate MMS into an IT-type device designed specifically for power SCADA applications. The NPort S9450I even supports using MMS to monitor serial communications between the S9450I and legacy devices.

Supports Modbus/DNP3 Protocol Gateway
The NPort S9450I Series provides maximum flexibility for integrating industrial Modbus/DNP3 networks of all types and sizes. The NPort S9450I is designed to integrate Modbus TCP, ASCII, and RTU devices in almost any master/slave combination, including simultaneous serial and Ethernet masters.

The NPort S9450I device servers also support protocol conversion between DNP3 serial and DNP3 IP. All models are ruggedly constructed and are DIN-rail mountable.

Cybersecurity Features Based on IEC 62443/NERC CIP
The NPort S9450I Series has security features based on IEC 62443/NERC CIP to provide a high level of cybersecurity. Protecting mission-critical networks from cyberattacks is a high priority for industrial automation applications, which can suffer large losses due to extended network downtime.

Ring Redundancy at the Device Level
Device-level communication networks for industrial automation are very critical since they are used to control and monitor device processes. The reliability of these communications depends on ring redundancy at the device level, which is designed to provide fast network fault detection and reconfiguration to support the most demanding control applications. The NPort S9450I Series integrates a full-function NPort device server with an industrial switch to carry serial and Ethernet devices at the same time.

In addition, the NPort S9450I can also achieve ring redundancy with standard STP/RSTP and Moxa’s proprietary Turbo Ring or Turbo Chain 2 redundancy protocols. This all-in-one design can be used to optimize and simplify your device network and enhance reliability.


Input/Output Interface
Digital Input Channels 2, Resistive load: 1 A @ 24 VDC
Digital Inputs 2
Alarm Contact Channels +13 to +30 V for state 1
-30 to +1 V for state 0
Max. input current: 8 mA
Ethernet Interface
10/100BaseT(X) Ports (RJ45 connector) NPort S9450I: 5 RJ45 ports
100BaseFX Ports (multi-mode SC connector) NPort S9450I-2M-SC: 3 RJ45 ports, 2 multi-mode SC ports
100BaseFX Ports (single-mode SC connector) NPort S9450I-2S-SC: 3 RJ45 ports, 2 single-mode SC ports
100BaseFX Ports (multi-mode ST connector) NPort S9450I-2M-ST: 3 RJ45 ports, 2 multi-mode ST ports
100BaseFX Ports (single-mode ST connector) NPort S9450I-2S-ST: 3 RJ45 ports, 2 single-mode ST ports
Optical Fibre
Multi-Mode Single-Mode
Fiber Cable Type OM1 50/125 µm G.652
800 MHz x km
Typical Distance 4 km 5 km 40 km
Wavelength Typical (nm) 1300 1310
TX Range (nm) 1260 to 1360 1280 to 1340
RX Range (nm) 1100 to 1600 1100 to 1600
Optical Power TX Range (dBm) -10 to -20 0 to -5
RX Range (dBm) -3 to -32 -3 to -34
Link Budget (dB) 12 29
Dispersion Penalty (dB) 3 1
Note: When connecting a single-mode fiber transceiver, we recommend using an attenuator to prevent damage caused by excessive optical power.
Note: Compute the “typical distance” of a specific fiber transceiver as follows: Link budget (dB) > dispersion penalty (dB) + total link loss (dB).
Magnetic Isolation Protection 1.5 kV (built-in)
Standards IEEE 802.1D-2004 for Spanning Tree Protocol
IEEE 802.1p for Class of Service
IEEE 802.1Q for VLAN Tagging
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1X for authentication
IEEE 802.3 for 10BaseT
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.3u for 100BaseT(X) and 100BaseFX
Switch Properties
IGMP Groups 256
Max. No. of VLANs 64
Max. No. of VLANs 4
VLAN ID Range VID 1 to 4094
Ethernet Software Features
Configuration Options Command Line Interface (CLI) through Serial/Telnet/SSH, Web Console (HTTP/HTTPS), Windows Utility
Management DHCP Client, DHCP Option 82, HTTP, IEC 61850 MMS, IPv4, LLDP, Port Mirror, RARP, RMON, SMTP, SNMPv1/v2c/v3, Syslog, Telnet, TFTP, Web Console
Filter GMRP, GVRP, IGMP v1/v2
Windows Real COM Drivers Windows 95/98/ME/NT/2000, Windows XP/2003/Vista/2008/7/8/8.1/10 (x86/x64), Windows 2008 R2/2012/2012 R2 (x64), Windows Embedded CE 5.0/6.0, Windows XP Embedded
Linux Real TTY Drivers Kernel versions: 2.4.x, 2.6.x, 3.x, 4.x, and 5.x
Fixed TTY Drivers SCO UNIX, SCO OpenServer, UnixWare 7, QNX 4.25, QNX 6, Solaris 10, FreeBSD, AIX 5.x, HP-UX 11i, Mac OS X
Android API Android 3.1.x and later
Time Management NTP Server/Client, SNTP
Industrial Protocol Modbus TCP Server (Slave), DNP3 TCP Outstation
Redundancy Protocols RSTP, Turbo Chain, Turbo Ring v1, Turbo Ring v2
Security HTTPS/SSL, Local Account Accessibility, TACACS+, RADIUS, SSH
MIB Bridge MIB, Device Settings MIB, Ethernet-like MIB, MIB-II, P-BRIDGE MIB, Q-BRIDGE MIB, RFC1213, RFC1317, RMON MIB Groups 1, 2, 3, 9, RSTP MIB
Serial Inteface
Connector DB9 male
No. of Ports 4
Serial Standard RS-232, RS-422, RS-485
Operation Modes Real COM mode, RFC2217 mode, TCP Client mode, TCP Server mode, UDP mode, Modbus mode, DNP3 mode, DNP3 Raw Socket mode, Disabled
Baudrate 50 bps to 921.6 kbps (supports non-standard baudrates)
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
Flow Control None, RTS/CTS, XON/XOFF
Isolation 2 kV
RS-485 Data Direction Control ADDC® (automatic data direction control)
Pull High/Low Resistor for RS-485 1 kilo-ohm, 150 kilo-ohms
Terminator for RS-485 120 ohms
Console Port RS-232 (TxD, RxD, GND), 10-pin RJ45 (19200, n, 8, 1)
Surge 4 kV
Serial Signals
RS-422 Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
DIP Switch Configuration
Ethernet Interface Coupler, Master, Reserved, Turbo Ring
Modbus TCP
Max. No. of Client Connections 32
Max. No. of Server Connections 16
DNP3 (Transparent)
Max. No. of Master Connections 16
Max. No. of Outstation Connections 32
Power Parameters
No. of Power Inputs 2
Power Connector 1 removable 5-contact terminal block(s)
Reverse Polarity Protection Supported
Input Current NPort S9450I-WV-T Series: 520 mA @ 24 VDC
NPort S9450I-HV-T Series: 80 mA @ 110 VDC
Input Voltage NPort S9450I-WV-T Series: 24/48 VDC (18 to 72 VDC)
NPort S9450I-HV-T Series: 110/220 VAC/VDC (110 to 220 VAC, 110 to 220 VDC)
Physical Characteristics
Housing Metal
Dimensions 80 x 160 x 109 mm (3.15 x 6.30 x 4.29 in)
Weight Product only: 2.54 kg (5.60 lb)
Installation DIN-rail mounting, Wall mounting (with optional kit)
Environmental Limits
Operating Temperature -40 to 85°C (-40 to 185°F)
Storage Temperature (package included) -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standard and Cerifications
EMC EN 61000-6-2/-6-4
EMI CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
IEC 61000-4-5 Surge: Power: 6 kV; Signal: 4 kV
IEC 61000-4-6 CS: 150 kHz to 80 MHz: 10 V/m; Signal: 10 V/m
IEC 61000-4-8 PFMF
IEC 61000-4-11
Environmental Testing IEC 60068-2-2
IEC 60068-2-14
Power Substation IEC 61850-3, IEEE 1613
Safety EN 61010-2-201, UL 61010-2-201
Hazardous Locations UL/cUL Class I Division 2 Groups A/B/C/D
Shock IEC 60068-2-27
Vibration IEC 60068-2-6, IEC 60068-2-64
Green Product RoHS, CRoHS, WEEE
Time 347,436 hrs
Standards Telcordia SR332
Warranty Period 5 years
Details See