Moxa NPort 5250A-T 2-Port Serial Device Server

Technical Overview

The Moxa NPort 5250A-T is an ultra-lean, ruggedized, and user-friendly 2-port serial-to-Ethernet device server designed to make serial devices network-ready instantly. It provides reliable connectivity, allowing PC software direct access to serial devices from anywhere on an IP-based Ethernet LAN. This model, part of the NPort 5200A Series, is specifically engineered for extended temperature operations and features robust surge protection for serial, Ethernet, and power lines, making it ideal for harsh industrial environments.

Key Features

Fast 3-step web-based configuration for quick setup.
Advanced surge protection for serial, Ethernet, and power lines, compliant with IEC 61000-4-5 standards.
Supports COM port grouping and UDP multicast applications for flexible communication.
Equipped with screw-type power connectors to ensure secure and stable power connections.
Offers versatile TCP and UDP operation modes for diverse network requirements.
Supports a wide range of standard baudrates up to 921.6 kbps.
Features a wide operating temperature range of -40 to 75°C for extreme conditions.
Constructed with a durable metal housing for enhanced ruggedness in industrial settings.
Includes Automatic Data Direction Control (ADDC) for efficient RS-485 communication.

Technical Specification Matrix

Parameter	Value
Input Voltage	12 to 48 VDC
Input Current	119 mA @ 12 VDC
Power Connector	1 removable 3-contact terminal block(s), Power input jack
Housing Material	Metal
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)
Ethernet Ports	1 x 10/100BaseT(X) (RJ45 connector)
Serial Ports	2 ports, RS-232/422/485 (DB9 male connector)
Magnetic Isolation Protection	1.5 kV (built-in)
Serial Surge Protection	0.5 kV
ESD Protection	15 kV (air), 8 kV (contact)
EMC Compliance	EN 55032/35
EMI Compliance	CISPR 32, FCC Part 15B Class A
EMS Compliance	IEC 61000-4-2 ESD (Contact: 8 kV; Air: 15 kV), IEC 61000-4-4 EFT (Power: 2 kV; Signal: 1 kV), IEC 61000-4-5 Surge (Power: 2 kV; Signal: 1 kV), IEC 61000-4-6 CS (150 kHz to 80 MHz: 10 V/m; Signal: 10 V/m)
Safety Certifications	EN 62368-1, IEC 62368-1, UL 60950-1

Industrial Applications

1. Remote Monitoring in Cold Storage Facilities

The Moxa NPort 5250A-T enables seamless integration of legacy serial-based temperature and humidity sensors (RS-232/485) within cold storage warehouses into modern Ethernet-based monitoring systems. Its wide operating temperature range from -40 to 75°C ensures reliable performance even in extreme cold environments.

Problem Solved

Provides robust and reliable data acquisition from critical environmental sensors operating at sub-zero temperatures, eliminating manual checks and centralizing monitoring over an IP network, leveraging the -40°C operating temperature and RS-485 connectivity.

Industrial IoTCold ChainTemperature MonitoringRS-485 to Ethernet-40°C OperationRemote Data Acquisition

2. Oil & Gas Field Data Collection at Wellheads

This device server is ideally suited for integrating serial flow meters, pressure sensors, and RTUs (Remote Terminal Units) at remote oil and gas wellhead sites into a central SCADA (Supervisory Control and Data Acquisition) system over an IP network. Its rugged metal housing and extended temperature range of -40 to 75°C, coupled with comprehensive surge protection for serial, Ethernet, and power lines, ensures consistent data flow in harsh outdoor conditions.

Problem Solved

Offers a durable and electrically protected serial-to-Ethernet solution for critical data collection in demanding oil and gas environments, mitigating risks from temperature extremes and electrical transients through its -40 to 75°C operating range and IEC 61000-4-5 compliant surge protection.

SCADA SystemsOil & Gas AutomationField InstrumentationRTU ConnectivitySurge ProtectionExtended TemperatureRS-422/485

3. Legacy Machine Integration in Factory Automation

The NPort 5250A-T acts as a crucial bridge for connecting older manufacturing equipment, such as barcode scanners, PLCs, and HMIs with RS-232/422/485 interfaces, to modern Ethernet-based control networks. Its robust design and versatile TCP/UDP operation modes allow for seamless integration of existing serial devices into a unified industrial automation system.

Problem Solved

Facilitates cost-effective modernization of factory automation by enabling communication between disparate legacy serial devices and contemporary Ethernet-based control systems, thus extending the lifespan of existing machinery and improving overall data visibility through its multi-standard serial ports (RS-232/422/485) and flexible network modes.

PLC CommunicationMachine ConnectivityIndustrial EthernetLegacy Systems IntegrationData AcquisitionFactory Automation