General
Insulation protection	2 kV (DC)

The NPort IA5250A - 1KV serial sur from Moxa is an industrial device server designed for secure and reliable connection of serial devices to Ethernet networks. It is specifically designed for use in harsh industrial environments where high demands are placed on electrical safety, mechanical robustness, and functionality. The device integrates an extended surge protection for serial, Ethernet, and power lines to prevent damage from transient voltage spikes. The surge protection safeguards connected devices and network infrastructure from transient voltage surges caused by lightning strikes, power switching operations, or other electrical disturbances.

Applications

The NPort IA5250A is suitable for use in industrial facilities such as manufacturing automation, power supply, traffic control, or process automation. It enables the integration of legacy systems with serial interfaces (e.g. RS-232/422/485) into modern IP-based networks. Certification to C1D2 and ATEX makes the device suitable for use in hazardous areas, with C1D2 certification confirming compliance with Canadian and US standards for electrical equipment in hazardous areas. ATEX certification refers to European directives for devices in explosive environments.

Features and Equipment in Detail

The device features isolation protection of 2 kV (DC) for serial signals, ensuring galvanic isolation between the serial device and the network. This protects against potential differences and prevents interference caused by differing ground potentials. The serial interfaces are connected via stable terminal blocks, enabling a secure and mechanically robust connection. Power supply is also provided via terminal blocks, with redundant DC power connections ensuring higher availability. In the event of a power failure or fault on one connection, the device can continue operating if the second connection remains functional.

Technology Explained Simply

The NPort IA5250A uses an integrated MiiNe CPU, which ensures low power consumption. This CPU is specifically optimized for industrial applications and enables efficient processing of serial data without high energy consumption. This reduces cable complexity and simplifies network architecture. Warning functions are provided via a relay output and by email, allowing operators to be informed of disturbances or fault conditions without requiring manual monitoring.

The cascading of Ethernet ports enables a linear chaining of multiple devices, reducing the number of required switch ports. This is particularly advantageous in installations with many serial devices that need to be accessed via a common network. The redundant power supply via two DC connections increases operational safety, as the device continues to function even if one power source fails.

Compatibility and Accessories

The device is designed for use with serial devices communicating via RS-232, RS-422, or RS-485 interfaces. The Ethernet connection is made via standard Ethernet ports compatible with common network switches. The integrated MiiNe CPU supports the necessary protocols for serial data transmission and network integration.

Mounting and Installation

Mounting is performed via terminal blocks for power supply and serial interfaces. The devices are designed for use in industrial enclosures or wall mounting. The robust construction and C1D2 and ATEX certifications allow use in harsh environments, including hazardous areas. Installation requires no special tools, as the terminal blocks are standardly equipped with screw clamps.

Operational Advantages

Operation of the NPort IA5250A is characterized by high reliability and low maintenance requirements. The integrated MiiNe CPU ensures stable operation with low power consumption. Warning functions via relay output and email enable proactive fault detection. The redundant power supply and cascading Ethernet ports increase availability and reduce network infrastructure complexity. The C1D2 and ATEX certifications expand the range of applications in hazardous environments without requiring additional protective measures.