General
DIO channels	4 softwarekonfigurierbar
Operating temperature	0–55 °C (Standard)
Operating temperature (Wide Temp)	-40–75 °C
Air humidity	5–95 % (nicht kondensierend)
MTBF	290.276 Stunden

The Moxa NE-4120A is a compact embedded device server that converts serial interfaces into network-capable Ethernet connections. It is part of the NE-4100 series and is designed for direct integration with existing serial devices, particularly in industrial or OEM environments where IP connectivity is required. The module is equipped with a pin header, enabling flexible mounting in device housings or on printed circuit boards. With dimensions of 57 × 40 mm, it is smaller than a credit card and thus suitable for space-saving installation solutions.

Applications

The NE-4120A is designed for applications where serial devices such as sensors, controls, or industrial peripherals need to be accessed over a network. It is commonly used in automation technology, the machine-building industry, or systems with legacy hardware, where migration to Ethernet networks is required without replacing all hardware. Support for RS-232, RS-422, and RS-485 enables connection to a wide range of serial end devices.

Functions and Features in Detail

The device offers a serial interface with one data port and one TTL console port. It supports baud rates from 110 bps to 230.4 kbps, with configurable data bits (5, 6, 7, 8), parity (None, Even, Odd, Space, Mark), and stop bits (1, 1.5, 2) to match the requirements of the connected device. Flow control options include RTS/CTS, DTR/DSR, and XON/XOFF, ensuring reliable data transmission. Network functions include Real COM, TCP Server, TCP Client, and UDP modes, providing flexible communication options.

Technology Explained Simply

The NE-4120A features a 10/100BaseT(X) Ethernet interface with Auto MDI/MDI-X, enabling automatic detection of the connection type (straight or crossover). Magnetic isolation of 1.5 kV protects the device from voltage surges and electromagnetic interference. The platform is based on a 16-bit MCU with 2 MB Flash memory and 1 MB SDRAM, sufficient for processing network and serial data. Additionally, four software-configurable DIO channels are integrated, which can be used for additional control or status signals.

Compatibility and Accessories

The device is compatible with operating systems such as Windows, Linux, macOS, Android, and UNIX systems. Support for network protocols including DHCP, BootP, ARP, SNMP, SMTP, and ICMP enables easy integration into existing networks. SNMP Traps and email notifications for defined events support monitoring and fault diagnosis. The NE-4100 series includes various models, such as the NE-4100T (TTL, drop-in), NE-4110S/4110A (RS-232/422/485, RJ45), and NE-4120S/4120A (RS-232/422/485, pin header), allowing modular selection based on connection type.

Mounting and Installation

The NE-4120A connects via a pin header, enabling direct mounting on a printed circuit board or within a housing. Power supply is via 5 VDC with a current consumption of 290 mA, corresponding to a power consumption of 1.5 W. Installation is performed via an integrated web interface, which allows configuration of network and serial data. Drivers for various operating systems facilitate integration into existing systems.

Operational Advantages

The NE-4120A is characterised by low power consumption and a compact design, making it particularly suitable for embedded systems. The high MTBF (mean time between failures) of up to 290,276 hours underscores the device’s reliability. Support for SNMP and email notifications enables proactive monitoring. Certifications according to EN 55032/24, CISPR 32, FCC Part 15B, and IEC 61000-4-x guarantee high electromagnetic compatibility. Compliance with RoHS, CRoHS, and WEEE ensures environmentally friendly manufacturing and disposal.

Operating Environment

The device is designed for operation at temperatures from 0 to 55 °C (standard version). A wide-temperature version is available for use from -40 to 75 °C. Storage is permitted at -40 to 60 °C, with humidity levels between 5 and 95 % (non-condensing). Mechanical dimensions are 57 × 40 mm, and weight ranges from 20 to 40 g.

Certifications and Standards

The devices comply with EMI/EMS standards EN 55032/24, CISPR 32, FCC Part 15B, and IEC 61000-4-x. Environmental testing is performed according to IEC 60068-2-x. Compliance with RoHS, CRoHS, and WEEE is ensured. The warranty period is 5 years.

Scope of Delivery

The scope of delivery includes 1 x Embedded Device Server module of the NE-4100 series.