Moxa NPort 5232I Industrial Grade Signal Isolated Serial Server

The Moxa NPort 5232I Industrial Grade Signal Isolated Serial Server is engineered for robust serial-to-Ethernet connectivity in demanding industrial environments. This device boasts dual Ethernet ports for network redundancy, advanced signal isolation for enhanced protection against electrical interference and surges, and support for a wide operating temperature range, making it ideal for critical automation and control applications. Its compact form factor and DIN-rail mounting capability simplify deployment in space-constrained control cabinets. The NPort 5232I facilitates seamless integration of legacy serial devices into modern TCP/IP networks, significantly improving data accessibility and system management.

Product Specifications

| Feature           | Specification                                                                    |

| :---------------- | :------------------------------------------------------------------------------- |

| Serial Interface  | 2 x RS-232/422/485 ports, DB9 male connectors                                    |

| Ethernet Interface| 2 x 10/100BaseT(X) Ethernet ports, RJ45 connectors                               |

| Isolation         | 2 kV isolation for serial ports, 1.5 kV isolation for Ethernet ports             |

| Power Input       | 12-45 VDC                                                                        |

| Operating Temp.   | -40 to 75 °C (-40 to 167 °F)                                                     |

| Mounting          | DIN-rail                                                                         |

| Protocols         | TCP Server, TCP Client, UDP Server, UDP Client, Pair Connection, RealCOM         |

| Management        | Web console, Telnet, Moxa PComm utility, Moxa Mgmt Suite                         |

| Dimensions        | 50 x 110 x 115 mm (1.97 x 4.33 x 4.53 in)                                          |

| Warranty          | 5 years                                                                          |

Core Features & Market Positioning

The Moxa NPort 5232I distinguishes itself through its industrial-grade resilience and flexible serial port configuration. Its dual-redundant Ethernet ports and robust 2 kV isolation for serial interfaces provide superior protection against common industrial electrical disturbances, ensuring uninterrupted operation where reliability is paramount. This level of isolation is crucial for safeguarding connected equipment and maintaining data integrity in harsh environments often found in manufacturing, oil and gas, and transportation sectors. The device's support for various serial modes (RS-232, RS-422, and RS-485) and multiple network protocols allows for versatile integration with a wide array of legacy and modern industrial equipment, positioning it as a powerful solution for brownfield deployments and IIoT modernization projects. Its long-term support and a five-year warranty further underscore Moxa's commitment to industrial longevity and customer confidence.

Key Application Scenarios

The NPort 5232I is exceptionally suited for extending the reach of serial communication protocols over Ethernet networks in challenging industrial settings. Common use cases include connecting Programmable Logic Controllers (PLCs), sensors, actuators, and other serial-based control systems to a SCADA or HMI system for centralized monitoring and control. In manufacturing automation, it enables the integration of older machine tools or robotic arms with modern Ethernet infrastructure, facilitating data acquisition for production analysis and predictive maintenance. For the energy sector, the NPort 5232I can be deployed in substations or remote wellheads to reliably transmit data from serial instruments to central control rooms, overcoming long distances and potential electrical noise. Furthermore, in intelligent transportation systems (ITS), it supports the networking of traffic controllers, variable message signs, and environmental sensors, enhancing traffic flow management and public safety.

Practical System Integration Guidance

Integrating the Moxa NPort 5232I into an industrial network is streamlined through its user-friendly management interfaces and robust connectivity options. For initial setup, users can connect to the NPort via its default IP address using a web browser or the Moxa PComm utility. Configuration typically involves assigning a static IP address to the NPort, setting the serial port parameters (baud rate, data bits, parity, stop bits, flow control) to match the connected serial device, and configuring the network connection mode (e.g., TCP Server for incoming connections or TCP Client for initiating connections to a specific host). For RS-485 multi-drop configurations, ensuring proper termination resistors are applied at the ends of the bus is critical for signal integrity. Wiring for RS-485 typically involves connecting the A, B, and GND lines, while RS-232 utilizes TX, RX, and GND. The device supports Moxa's patented RealCOM driver, which allows Windows applications to access serial ports over the network as if they were locally connected, simplifying software migration.

Operation and Risk Mitigation

Operating the Moxa NPort 5232I requires attention to power supply stability and network security. It is crucial to use a power supply within the specified voltage range (12-45 VDC) and ensure adequate current capacity to prevent operational instability or device failure. The signal isolation feature of the NPort 5232I significantly mitigates the risk of damage from ground loops, voltage spikes, and electrical surges commonly encountered in industrial environments, thereby protecting both the NPort and the connected serial devices. Network security should be addressed by implementing appropriate firewall rules to restrict access to the NPort's management interfaces and data ports, and by avoiding the use of default credentials. Regular firmware updates from Moxa are recommended to patch potential vulnerabilities and ensure optimal performance. In the event of communication loss, troubleshooting often involves verifying physical connections, checking serial port settings against the connected device, and confirming network reachability and configuration.

Scalability & Long-Term Value

The Moxa NPort 5232I offers excellent scalability and long-term value, particularly within distributed industrial control systems and the expanding Industrial Internet of Things (IIoT) landscape. Its ability to convert multiple serial interfaces to Ethernet allows for the seamless integration of a vast number of legacy devices into modern IP-based networks, extending their operational lifespan and enabling remote management and data collection. The device is compatible with Moxa's broader portfolio of industrial Ethernet switches and gateways, facilitating the construction of robust and scalable network architectures. As industries move towards digital transformation, the NPort 5232I serves as a critical bridge, enabling brownfield assets to participate in IIoT initiatives by providing vital serial data over Ethernet for cloud-based analytics, machine learning, and integrated enterprise resource planning (ERP) systems. The consistent product lifecycle support and ongoing development by Moxa ensure that the NPort 5232I remains a viable and valuable component in industrial automation strategies for years to come.

Frequently Asked Questions

What are the primary benefits of using the Moxa NPort 5232I?

The NPort 5232I offers robust industrial-grade reliability with 2 kV signal isolation, protecting against electrical surges. It features dual Ethernet ports for network redundancy, ensuring continuous operation even if one link fails. Its wide operating temperature range (-40 to 75 °C) makes it suitable for extreme environments.

How do I configure the serial port settings on the NPort 5232I?

Serial port configuration is done via the web console, Telnet, or Moxa PComm utility. You need to match the baud rate, data bits, parity, stop bits, and flow control to the connected serial device. Ensure correct RS-232, RS-422, or RS-485 mode selection.

What network protocols does the Moxa NPort 5232I support?

It supports common industrial Ethernet protocols like TCP Server, TCP Client, UDP Server, and UDP Client. The Pair Connection mode allows for transparent serial-to-serial communication over Ethernet. Moxa's RealCOM driver provides virtual COM port functionality for legacy applications.

How does the dual Ethernet port feature enhance network reliability?

The dual Ethernet ports enable network redundancy through protocols like Spanning Tree Protocol (STP). If a primary network link fails, traffic is automatically rerouted through the secondary link, minimizing downtime. This is critical for applications requiring high availability.

What kind of serial devices can be connected to the NPort 5232I?

You can connect a wide range of serial devices, including PLCs, barcode scanners, weighing scales, CNC machines, and sensors. It supports RS-232, RS-422, and RS-485 interfaces, offering great flexibility for diverse industrial equipment.

What are the power requirements for the NPort 5232I?

The device requires a DC power input ranging from 12 to 45 VDC. It's recommended to use a stable, regulated power supply that meets or exceeds the current requirements to ensure reliable operation.

How is the NPort 5232I physically installed in an industrial cabinet?

The NPort 5232I is designed for DIN-rail mounting, a standard in industrial control cabinets. This allows for quick and secure installation without the need for specialized tools or mounting hardware.

Can the NPort 5232I be managed remotely?

Yes, remote management is supported via web browser, Telnet, or Moxa's network management suite. This allows for configuration, monitoring, and troubleshooting from a central location, reducing the need for on-site visits.

What is the significance of signal isolation in the NPort 5232I?

Signal isolation (2 kV for serial, 1.5 kV for Ethernet) protects connected devices and the NPort itself from ground loops, voltage spikes, and electrical noise common in industrial environments. This enhances system stability and prevents equipment damage.

Does Moxa provide software utilities for the NPort 5232I?

Yes, Moxa offers several utilities, including the PComm Port Control Utility for configuring serial port settings and the Moxa Network Management Suite for managing multiple Moxa devices on a network. The RealCOM driver enables legacy Windows applications.