General
Galvanic network isolation	1,5 kV -
Certification	EN 50155, EN 50121-4 -
MTBF	639.622 Stunden (Telcordia Standard)
Data bits	5, 6, 7, 8 -
Stop bits	1, 1.5, 2 -

The NPort 5250AI-M12 from Moxa is an industrial device server, specifically designed for use in railway applications and environments with high vibration. The device enables networking of serial devices such as controls, sensors or communication units over an Ethernet network. It features two serial ports with support for RS-232, RS-422 and RS-485, where the interfaces are galvanically isolated and have an isolation strength of 2 kV. The serial connections are made via DB9 male sockets. The network interface is a 10/100BaseT(X) port with an M12 D-coded, 4-pin socket, supplemented by integrated galvanic isolation of 1.5 kV. Power supply is via an M12 A-coded, 5-pin plug in the voltage range of 12 to 48 VDC, with EN 50155 compliance ensured at 24 and 48 VDC. Power consumption is 360 mA at 12 VDC.

Applications

The NPort 5250AI-M12 is designed for industrial applications, particularly in rail transport, where high mechanical loads and strictly defined environmental conditions prevail. Certifications according to EN 50155 and EN 50121-4 confirm suitability for railway applications. The device is also suitable for other environments with high vibrations, such as in manufacturing industry or mining. Operating temperature ranges from -25 to 55 °C, with an extended version available from -40 to 75 °C. Storage temperature is -40 to 85 °C, and humidity is between 5 and 95 % (non-condensing).

Functions and Equipment in Detail

Configuration is performed via a web-based user interface (Web-GUI) with HTTP/HTTPS support, supplemented by tools such as Windows Utility, DSU, MCC Tool and Telnet. Communication parameters include baud rates from 50 to 921.600 bps, data bits 5 to 8, stop bits 1, 1.5 or 2, parities None, Even, Odd, Space, Mark, and flow controls RTS/CTS, DTR/DSR (RS-232 only) and XON/XOFF. For RS-485, automatic data direction control (ADDC) is integrated. Network functions include protocols such as ARP, BOOTP, DHCP, DNS, ICMP, IPv4, LLDP, SMTP, SNMPv1/v2c, TCP/IP, UDP, as well as IGMP-Filter Version 1 and 2. Alarm functions such as E-Mail or SNMP-Trap for events like restart or password change are also implemented.

Technology Explained Simply

Galvanic isolation protects the serial interfaces from voltage spikes and electrical disturbances, which is especially important in industrial environments. The M12 connectors provide a robust, vibration-resistant connection designed for use in railway applications. The integrated network isolation (1.5 kV) protects the device and the network from disturbances. Support for HTTPS and TLS 1.2 ensures secure communication. Operating system support ranges from Windows 95 to 11, Server 2000 to 2022, CE 5.0/6.0, XP Embedded, Linux (Kernel 2.4 to 5.x), macOS (10.12 to 10.15, OS X) as well as other systems such as Unix, SCO, QNX, Solaris, FreeBSD, AIX, HP-UX and Android API from 3.1.x.

Compatibility and Accessories

The NPort 5250AI-M12 is compatible with a wide range of operating systems and network protocols. The serial interfaces enable integration of devices communicating via RS-232, RS-422 or RS-485. The M12 network interface is suitable for use in industrial environments. Certifications according to EN 50155 and EN 50121-4 ensure suitability for railway applications. Power supply via M12 A-coded is standardized and enables easy integration into existing systems.

Mounting and Installation

The device features an IP40 metal housing with dimensions of 80 x 216.6 x 52.9 mm and a weight of 686 g. Mounting is done via screw fastening. The conformal-coated PCB (CT models) increases reliability in harsh environments. Installation is performed via the web-based 3-step configuration, which accelerates commissioning. Power supply is via the M12 A-coded plug, which is connected directly to a 12- to 48-VDC source.

Operational Advantages

The NPort 5250AI-M12 offers high reliability through certifications according to EN 50155 and EN 50121-4 as well as robust construction with M12 connectors and IP40 housing. Galvanic isolation protects against disturbances, and web-based configuration simplifies commissioning. Support for many operating systems and protocols increases flexibility. The MTBF (Telcordia Standard) is 639,622 hours, indicating high operational reliability. Security functions such as HTTPS, AES-128, RSA-1024, SHA-1, SHA-256 and SNMPv3 ensure secure communication.

Scope of Delivery

The scope of delivery includes 1x NPort 5000AI-M12 device server, 1x quick start guide and 1x warranty card.

Certifications

The device is certified according to EN 50155 (including all mandatory test points), EN 50121-4 (railway technology), EMC/EMI: EN 55032/35, FCC Class A, EMS: IEC 61000-4-2 to -4-8, Safety: UL 60950-1, Vibration: IEC 60068-2-6, and Environment: RoHS, CRoHS, WEEE. Vibration testing is performed according to IEC 60068-2-6.

Security Functions

Authentication is performed via a local user database. Encryption includes HTTPS, AES-128, RSA-1024, SHA-1, SHA-256. Protocols SNMPv3 and HTTPS with TLS 1.2 are supported. Security functions ensure protected operation in sensitive environments.

Operating System Support

Supported systems include Windows (95 to 11, Server 2000 to 2022, CE 5.0/6.0, XP Embedded), Linux (Kernel 2.4 to 5.x), macOS (10.12 to 10.15, OS X), as well as Unix, SCO, QNX, Solaris, FreeBSD, AIX, HP-UX and Android API from 3.1.x.

Power Supply

Input voltage is 12 to 48 VDC, with EN 50155 compliance at 24 and 48 VDC. Power consumption is 360 mA at 12 VDC. Connection is via an M12 A-coded, 5-pin plug.

Housing and Mounting

The housing is made of metal and is IP40-protected. Dimensions are 80 x 216.6 x 52.9 mm, weight is 686 g. Mounting is done via screws. The PCB is conformal-coated (CT models).

Environmental Conditions

Operating temperature is -25 to 55 °C (standard), with a wide-temperature version available from -40 to 75 °C. Storage temperature is -40 to 85 °C. Humidity is 5 to 95 % (non-condensing).

MTBF

The MTBF (Telcordia Standard) is 639,622 hours.

Certifications

EN 50155 (including all mandatory test points), EN 50121-4 (railway technology), EMC/EMI: EN 55032/35, FCC Class A, EMS: IEC 61000-4-2 to -4-8, Safety: UL 60950-1, Vibration: IEC 60068-2-6, Environment: RoHS, CRoHS, WEEE.

Security Functions

Authentication: local user database. Encryption: HTTPS, AES-128, RSA-1024, SHA-1, SHA-256. Protocols: SNMPv3, HTTPS with TLS 1.2.

Operating System Support

Windows (95 to 11, Server 2000 to 2022, CE 5.0/6.0, XP Embedded), Linux (Kernel 2.4 to 5.x), macOS (10.12 to 10.15, OS X), Unix, SCO, QNX, Solaris, FreeBSD, AIX, HP-UX, Android API from 3.1.x.

Power Supply

Input voltage: 12 to 48 VDC (EN 50155-compliant at 24/48 VDC). Power consumption: 360 mA @ 12 VDC. Connection: M12 A-coded, 5-pin, plug.

Housing and Mounting

Material: metal, IP40. Dimensions: 80 x 216.6 x 52.9 mm. Weight: 686 g. Conformal-coated PCB (CT models).

Environmental Conditions

Operating temperature: -25 to 55 °C (standard). Storage temperature: -40 to 85 °C. Humidity: 5 to 95 % (non-condensing).

MTBF

639,622 hours (Telcordia Standard).