Moxa NPort 5650-8-DT-J 8-Port Serial Device Server

Technical Overview

The Moxa NPort 5650-8-DT-J serial to Ethernet device server is an advanced solution designed to seamlessly integrate serial devices into an Ethernet network. This device server allows connection of up to 8 serial devices to a network with basic configuration, enabling centralized management and distribution of management hosts across the network. It's an excellent choice for Factory Automation and other industrial applications.

Key Features

8 serial ports supporting RS-232/422/485 standards.
Compact desktop design for flexible installation.
Two 10/100M auto-sensing Ethernet ports.
Easy IP address configuration with an integrated LCD panel.
Configurable via Telnet console, web console (HTTP/HTTPS), or Windows utility.
Supports versatile socket operation modes including TCP Server, TCP Client, UDP, and Real COM.
SNMP MIB-II support for comprehensive network management.
Automatic Data Direction Control (ADDC) for RS-485 applications.
Selectable 1 kΩ and 150 kΩ pull high/low resistors and a 120 Ω terminator for RS-485.
Dual power inputs (terminal block and power jack) with reverse polarity protection.
Metal housing for enhanced durability in industrial environments.
Built-in Watchdog Timer (WDT) for system reliability.

Technical Specification Matrix

Parameter	Value
Input Voltage	12 to 48 VDC
Input Current	615 mA @ 12 VDC
Number of Power Inputs	2
Housing Material	Metal
Operating Temperature	0 to 55°C (32 to 131°F)
Storage Temperature	-40 to 75°C (-40 to 167°F)
Ambient Relative Humidity	5 to 95% (non-condensing)
Ethernet Ports	2 x 10/100BaseT(X) (RJ45 connector)
Magnetic Isolation Protection	1.5 kV
Serial Ports	8 (RS-232/422/485 via 8-pin RJ45 connectors)
Baudrate	50 bps to 921.6 kbps
ESD Protection (IEC 61000-4-2)	Contact: 6 kV; Air: 8 kV
RS-485 Pull High/Low Resistor	1 kΩ, 150 kΩ
RS-485 Terminator	120 Ω

Industrial Applications

1. Factory Automation for Legacy Equipment Integration

Modernizing manufacturing plants requires integrating older machinery with new Ethernet-based control systems. The NPort 5650-8-DT-J seamlessly connects up to 8 serial devices (PLCs, HMI panels, barcode scanners) to the plant's Ethernet network.

Problem Solved

Overcomes the incompatibility between legacy serial interfaces (RS-232/422/485) and modern Ethernet networks, eliminating the need for expensive equipment replacement. The wide voltage input (12-48 VDC) and durable metal housing ensure reliable operation in harsh industrial environments.

RS-232RS-422RS-485EthernetPLCSCADAHMIFactory AutomationIndustrial IoTLegacy Integration12-48 VDC

2. Centralized Building Management Systems (BMS)

In large buildings, various systems like access control, HVAC units, and security cameras often communicate via serial protocols. This device can aggregate data from up to 8 such devices and forward it to a central Ethernet-based BMS for monitoring and control.

Problem Solved

Enables centralized management and monitoring of disparate building systems by converting their serial data to Ethernet. The compact desktop design allows for flexible installation in control rooms or wiring closets, and the dual power inputs provide redundancy for continuous operation.

Building Management SystemAccess ControlHVACSecurity SystemsSerial-to-EthernetCentralized MonitoringRS-485Data Aggregation0-55°C Operating Temperature

3. Remote Data Acquisition for Utility Infrastructure

For remote monitoring of utility infrastructure such as power substations or water treatment facilities, serial devices (e.g., meters, sensors, RTUs) need to send data over long distances to a central control center. This device server connects multiple serial instruments and transmits their data over an IP network.

Problem Solved

Facilitates reliable data acquisition from remote serial devices over an Ethernet/IP network, enabling remote diagnostics and operational control. The robust metal housing and support for RS-485 with adjustable termination options (1kΩ, 150kΩ, 120Ω) ensure stable communication in challenging and potentially noisy environments.

Remote MonitoringData AcquisitionRTUSCADAUtility AutomationRS-485Serial-to-EthernetDurable Metal HousingWide Temperature Range (0-55°C)