Moxa NPort 5650I-8-DT-T 8-Port Serial Device Server

Technical Overview

The Moxa NPort 5650I-8-DT-T is an 8-port RS-232/422/485 serial-to-Ethernet device server, designed to seamlessly integrate serial devices into an Ethernet network within industrial environments. It features 2 kV isolation for serial signals, 0.5 kV surge protection, and a wide operating temperature range of -40 to 75°C, ensuring reliable performance in harsh conditions. The compact desktop design includes dual 10/100 Mbps Ethernet ports for convenient cascade wiring, reducing installation complexity and cabling costs. Advanced RS-485 features like Automatic Data Direction Control (ADDC) and selectable termination/pull high/low resistors provide optimal signal integrity. Flexible power input (12-48 VDC) with reverse polarity protection further enhances its suitability for diverse industrial applications.

Key Features

8 RS-232/422/485 serial ports with DB9 male connectors.
Dual 10/100 Mbps Ethernet ports with 1.5 kV magnetic isolation for simplified cascade wiring.
2 kV isolation for serial signals and 0.5 kV surge protection against electrical disturbances.
Wide operating temperature range of -40 to 75°C (-40 to 167°F) for harsh industrial environments.
Automatic Data Direction Control (ADDC) for RS-485 networks.
Selectable 1 kΩ and 150 kΩ pull high/low resistors and 120 Ω terminator for RS-485.
Configuration options via serial console, Telnet, web console (HTTP/HTTPS), or Windows utility.
Metal housing for enhanced durability.
LED indicators for system, network, and serial port status to aid maintenance.
Supports Windows Real COM, Linux Real TTY, Fixed TTY, and Android API drivers.

Technical Specification Matrix

Parameter	Value
Input Voltage	12 to 48 VDC
Input Current	1066 mA @ 12 VDC
Operating Temperature	-40 to 75°C (-40 to 167°F)
Storage Temperature	-40 to 75°C (-40 to 167°F)
Ambient Relative Humidity	5 to 95% (non-condensing)
Serial Ports	8
Serial Connector	DB9 male
Serial Standards	RS-232/422/485
Serial Isolation	2 kV
Serial Surge Protection	0.5 kV
Ethernet Ports	2 x 10/100BaseT(X) (RJ45)
Ethernet Magnetic Isolation	1.5 kV
Housing	Metal
RS-485 Pull High/Low Resistors	1 kΩ, 150 kΩ (selectable)
RS-485 Terminator	120 Ω
EMC Certifications	EN 55032/35, CISPR 32, FCC Part 15B Class A
EMS Certifications	IEC 61000-4-2 ESD (6 kV contact, 8 kV air), IEC 61000-4-4 EFT (2 kV power, 0.5 kV signal), IEC 61000-4-5 Surge (2 kV power, 0.5 kV signal), IEC 61000-4-6 CS
Safety Certifications	UL 60950-1, IEC 62368-1

Industrial Applications

1. Industrial Control System Integration

Connecting legacy RS-232/422/485 based PLCs, sensors, and actuators to modern Ethernet-based control networks in a factory automation environment. The 8 serial ports allow for centralized management of multiple devices.

Problem Solved

Integrates diverse serial industrial equipment into a unified Ethernet network, overcoming incompatibility issues and enabling remote monitoring and control. The 2kV isolation protects sensitive control systems from electrical noise.

PLC connectivitySCADA integrationFactory AutomationSerial to Ethernet2 kV Isolation

2. Remote Monitoring in Harsh Environments

Deploying the device server in outdoor substations, oil and gas pipelines, or unconditioned industrial cabinets to collect data from serial devices (e.g., meters, RTUs) and transmit it over Ethernet. The wide operating temperature range (-40 to 75°C) and robust metal housing are critical.

Problem Solved

Ensures reliable data communication and network access for serial devices in extreme temperatures and electrically noisy outdoor or industrial settings, where standard equipment would fail.

Remote RTU monitoringOutdoor industrial applicationsWide temperature rangeRS-485 long distanceRobust connectivity

3. Building Management Systems (BMS)

Interfacing various serial-based building automation devices such as HVAC controllers, access control systems, and power meters to the building's IP network. The dual Ethernet ports facilitate daisy-chaining multiple units, simplifying wiring infrastructure.

Problem Solved

Modernizes building infrastructure by bridging older serial equipment with IP networks, enabling central control and data logging. The dual Ethernet ports reduce cabling and switch port requirements in large installations.

HVAC controlAccess control integrationBuilding AutomationDual EthernetSerial device networking