Moxa NPort S8455I-SS-SC NPORT S8455I-SS-SC User Manual

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Serial-to-Ethernet Solutions

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Serial QoS for configuring serial data transmission priority

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2 KV (DC) isolation protection for each serial port

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Adjustable pull high/low resistor for RS-485 ports

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Two fiber Ethernet ports and three Ethernet ports

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Ethernet redundancy with Turbo Ring® (recovery time < 20 ms) 

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or RSTP/STP (IEEE 802.1w/D) supported
QoS, IGMP-snooping/GMRP, VLAN, LACP, SNMPv1/v2c/v3, 

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RMON supported
Surge protection for serial, power, and Ethernet

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The NPort® S8000 series combines an industrial device server with 
a full-function managed Ethernet switch by integrating 2 fiber ports, 
3 Ethernet ports, and 4 RS-232/422/485 serial ports, allowing you 
to easily install, manage, and maintain the product. Combining a 

The NPort® S8000 series supports the complete array of NPort® 
5000 series device server functions. You can network your existing 
serial devices by connecting up to 4 serial devices through each of the 

Device level communication networks for industrial automation 
are very critical since they are used to control and monitor device 
processes. A significant part of this type of communication depends 
on ring redundancy at the device 
level, which is designed to provide 
fast network fault detection and 
reconfiguration in order to support the 
most demanding control applications. 

The NPort S8000 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 S8000 can also 
achieve ring redundancy with standard 
STP/RSTP and Moxa’s proprietary Turbo 

The NPort® S8000 series has a built-in full-function managed 
Ethernet switch that supports QoS, IGMP-snooping/GMRP, VLAN, 
Port Trunking, SNMPv1/v2c/v3, and IEEE 802.1X, allowing you to 
handle virtually any kind of application. Ethernet redundancy, which 

device server and switch in one product allows you to save space in 
your cabinet, reduce overall power consumption, and reduce costs, 
since you will not need to purchase a switch and serial device server 
separately.

5 Ethernet ports, with only basic configuration required. In addition, 
data transmission between the serial and Ethernet interfaces is bi-
directional.

Ring or Turbo Ring 2 redundancy protocols. This all-in-one design can 
be used to optimize and simplify your device network, and enhance 
reliability.

is used to increase the reliability and availability of your industrial 
Ethernet network, is provided by Moxa’s own Turbo Ring® technology 
(recovery time < 20 ms) or RSTP/STP (IEEE 802.1w/D).