• NPort W2150A/NPort W2250A
  • NPort S9450I Series

NPort S8000 Series

Features and Benefits

  • 4-port RS-232/422/485 serial device server
    • Serial QoS for configuring serial data transmission priority
    • 2 kV (DC) isolation protection for each serial port (S8455 only)
    • Adjustable pull high/low resistor for RS-485 ports (S8455 only)
  • Built-in managed Ethernet switch
    • S8455I Fiber: Two fiber Ethernet ports and three Ethernet ports
    • S8455I All Copper: Five Ethernet ports
    • S8458: Four fiber Ethernet ports and four Ethernet ports
  • Ethernet redundancy with Turbo Ring and Turbo Chain (recovery time < 20 ms) or RSTP/STP (IEEE 802.1w/D) supported
  • QoS, IGMP-snooping/GMRP, VLAN, LACP, SNMPv1/v2c/v3, RMON supported
  • Surge protection for serial, power, and Ethernet


General Specifications
• Port Summary
Serial Ports 4 RS-232/422/485 ports
Ethernet Switch Ports NPort S8455I all copper: 5 RJ45 copper ports
NPort S8455I fiber: 3 RJ45 copper ports and 2 fiber ports
NPort S8458: 4 RJ45 copper ports and 4 fiber ports
Console Ports 1 (8-pin RJ45 connector)
• Physical Characteristics
Housing Metal
Weight NPort S8455I: 578 g (1.27 lb)
NPort S8458: 1,105 g (2.44 lb)
Dimensions NPort S8455I: 73.1 x 134 x 125 mm (2.88 x 5.27 x 4.92 in)
NPort S8458: 93 x 144 x 125 mm (3.66 x 5.64 x 4.92 in)
• Environmental Limits
Operating Temperature Standard Models: 0 to 60°C (32 to 140°F)
Wide Temp. Models:
NPort S8455I-T: -40 to 75°C (-40 to 167°F)
NPort S8458-T: -40 to 85°C (-40 to 185°F)
Storage Temperature -40 to 75°C (-40 to 167°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
• Power Requirements
Input Voltage 12 to 48 VDC
Input Current NPort S8455I: 935 mA @ 12 VDC
NPort S8458: 940 mA @ 12 VDC
• Standards and Certifications
Safety UL 508, UL 60950-1
EMC EN 55022/24
EMI CISPR 22, FCC Part 15B Class A
EMS NPort S8455I:
IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
IEC 61000-4-4 EFT: Power: 2 kV; Signal: 1 kV
IEC 61000-4-5 Surge: Power 1 kV (4 kV for all copper models); Signal: 0.25 kV
IEC 61000-4-6 CS: 150 kHz to
Hazardous Location UL/cUL Class I Division 2 Groups A/B/C/D (S8455I all copper model only)
• Warranty
Warranty Period 5 years
Details See www.moxa.com/warranty
• Device Server Specifications
• Serial Interface
Number of Ports 4
Serial Standards RS-232/422/485
Connector DB9 male
Serial Line Protection 2 kV isolation protection (NPort S8455I only)
RS-485 Data Direction Control ADDC® (Automatic Data Direction Control)
Pull High/Low Resistor for RS-485 1 kΩ, 150 kΩ
Terminator for RS-485 120 Ω
Console Port Dedicated RS-232 console port (8-pin RJ45)
• Serial Communication Parameters
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
Flow Control RTS/CTS and XON/XOFF
Baudrate 50 bps to 921.6 Kbps
• Serial Signals
RS-422 Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
• Software
Configuration Options Web Console, Telnet Console, Serial Console, Windows Utility
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
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
Linux Real TTY Drivers Linux 2.4.x, 2.6.x, 3.x, 4.x
Android API Android 3.1.x and later
Operation Modes Real COM, TCP Server, TCP Client, UDP, RFC2217
Management SNMP MIB-II
• Reliability
Alert Tools Built-in buzzer and RTC (real-time clock)
Automatic Reboot Trigger Built-in WDT (watchdog timer)
• MTBF (mean time between failures)
Time NPort S8455I Single-mode: 286,993 hrs
NPort S8455I Multi-mode: 200, 951 hrs
NPort S8455I All copper: 287,354 hrs
NPort S8458: 163,624 hrs
Standard Telcordia (Bellcore) Standard TR/SR
• Ethernet Switch Specifications
• Ethernet Interface
Standards IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for Flow Control
IEEE 802.1D for Spanning Tree Protocol
IEEE 802.1w for Rapid STP
IEEE 802.1Q for VLAN Tagging
IEEE 802.1p for Class of Service
IEEE 802.1x for Authenti
Network Protocols ICMP, IPv4, TCP, UDP, ARP, Telnet, DNS, HTTP, SMTP, SNTP, IGMPv1/v2, GVRP, SNMPv1/v2c/v3, DHCP Server/Client, DHCP Option 82, BootP, TFTP, SNTP, SMTP, RARP, GMRP, LACP, RMON
MIB MIB-II, Ethernet-Like MIB, P-BRIDGE MIB, Q-BRIDGE MIB, Bridge MIB, RSTP MIB, RMON MIB Group 1, 2, 3, 9
Flow Control IEEE 802.3x flow control, back pressure flow control interface
• Switch Properties
Priority Queues 4
Max. Number of Available VLANs 64
VLAN ID Range VID 1 to 4094
IGMP Groups 256