MOXA NPort 5230 2-Port Device Server - Compact Serial to Ethernet

Our review of the MOXA NPort 5230 finds it best suited for engineers and integrators who need a compact, reliable way to bring industrial serial equipment online. The single biggest reason to buy is its combination of mixed serial support and simple network integration: one RS-232 port and one RS-422/485 port in a small enclosure that makes connecting PLCs, meters, or sensors to an IP network straightforward. For small control cabinets or field panels where space and configuration time matter, this device server delivers the essentials without added complexity.

Key Features

• Dual serial ports: Includes one RS-232 and one RS-422/485 port so users can connect a wider range of legacy industrial devices without extra adapters.
• Compact design: Small footprint allows easy mounting in control cabinets or on DIN rails where space is limited.
• Flexible socket modes: Supports TCP server, TCP client, and UDP modes so serial devices can be accessed in most network topologies.
• Windows configuration utility: A straightforward utility lets technicians discover and configure multiple units quickly across the LAN, reducing setup time on site.
• Network management: SNMP MIB-II support allows integration with existing network monitoring systems for basic device health and status reporting.
• Automatic RS-485 control: ADDC (Automatic Data Direction Control) handles 2-wire and 4-wire RS-485 direction switching so software does not need to toggle RTS lines manually.

Who It's For

Field technicians, system integrators, and plant engineers who need to connect serial devices like PLCs, meters, sensors, or other instruments to an Ethernet LAN will appreciate the NPort 5230. Its compact size and mixed RS-232/RS-422/485 support make it a practical choice for retrofitting older equipment into modern networks, especially where rack or panel space is constrained.

Those who need advanced industrial-grade features such as wide-temperature operation, ruggedized IP66 enclosures, or built-in firewalling should look elsewhere; the NPort 5230 is aimed at straightforward serial-to-Ethernet bridging and ease of deployment rather than extreme environmental or cybersecurity requirements.

Pros & Cons

Pros

• Supports both RS-232 and RS-422/485 for flexible device compatibility.
• Small, easy-to-install package suits cramped control cabinets and field racks.
• Multiple socket modes and a Windows utility make network integration and bulk configuration efficient.

Cons

• Not targeted at harsh-environment or heavy-duty industrial housings, so check enclosure and temperature needs before deployment.

Specifications

Our Verdict

The MOXA NPort 5230 is a sensible, cost-effective solution for bringing serial devices onto an IP network when you need mixed-port support and simple deployment. It is particularly good value for projects that require quick configuration and minimal footprint, though teams needing rugged enclosures or advanced environmental specifications should consider more heavy-duty models.

Frequently Asked Questions

Can the NPort 5230 handle both RS-232 and RS-485 at once?
Yes, it provides one RS-232 port and one RS-422/485 port so you can connect different serial device types simultaneously.

How is the device configured on a network?
A provided Windows utility lets you discover and configure multiple NPort 5230 units on the LAN, and it supports TCP server, TCP client, and UDP socket modes.

Does it support network monitoring?
Basic network management is supported via SNMP MIB-II so the device can be polled by standard monitoring systems.