General
Number of serial ports	2
Data bits	5, 6, 7, 8
Storage temperature	-40–60 °C

The Moxa NE-4120S-T is a compact embedded device server, specifically developed for OEM applications where serial devices need to be integrated over a network. The device features a space-saving design with dimensions of 57 × 40 mm and a weight of 20 g, making it ideal for installation in limited spaces. It supports serial interfaces such as RS-232, RS-422, RS-485, and TTL, and provides two ports: one serial port and one TTL console port. The serial interface supports baud rates from 110 bps to 230.4 kbps, data bits 5 to 8, stop bits 1, 1.5, and 2, as well as parities including None, Even, Odd, Space, and Mark. Flow control options include RTS/CTS, DTR/DSR, and XON/XOFF. The network interface operates at 10/100 Mbps Ethernet with Auto MDI/MDI-X, and features magnetic isolation of 1.5 kV. The interface is via a 5-pin header, facilitating integration into existing systems.

Applications

The NE-4120S-T is designed for industrial and embedded applications where serial devices such as sensors, controls, or measuring instruments need to be accessed over a network. It is particularly suitable for OEM manufacturers who wish to equip their products with network functionality without requiring additional space or high power consumption. The low power consumption of 290 mA at 5 VDC also makes it suitable for battery-powered or energy-efficient systems.

Functions and Features in Detail

The device offers multiple operating modes, including Real COM, TCP Server, TCP Client, and UDP, enabling flexible integration into various network environments. Configuration can be performed via a web browser (HTTP), a Windows utility, Telnet, or a serial console. Supported network protocols include DHCP, BOOTP, Static IP, ARP, SNMPv1/v2c, SMTP, ICMP, TCP/IP, and UDP. SNMP Traps and email notifications can be enabled for events such as (re)start, authentication errors, IP or password changes, and signal transitions of DSR/DCD, to monitor operation.

Technology Explained Simply

The NE-4120S-T is based on a 16-bit MCU and features 2 MB Flash memory and 1 MB SDRAM. The integrated 4 digital I/O channels are software-configurable and extend the device’s functionality. Power supply is via 5 VDC, with a current consumption of 290 mA. The operating temperature range is 0 to 55 °C (standard) or -40 to 75 °C (wide temperature), and the storage temperature is -40 to 60 °C. Humidity can range from 5 to 95 %, without condensation. The pin-header module form factor allows direct mounting on a printed circuit board system.

Compatibility and Accessories

The device server is compatible with a wide range of operating systems, including Windows (95 to 10, Server 2000–2019, Embedded CE/XPe), Linux (Kernel 2.4–5.x), macOS, Unix, and Android API from 3.1. Certifications include EMC standards such as EN 55032/24, FCC Part 15B, CISPR 32, and EMS standards such as IEC 61000-4-2/3/4/5/6/8. Environmental certifications include RoHS, CRoHS, and WEEE. The MTBF is up to 290,276 hours according to Telcordia SR332. The warranty covers 5 years.

Mounting and Installation

Mounting is done via the 5-pin header, which is directly inserted onto a printed circuit board. Configuration is performed via a web interface accessible through a standard web browser. Network settings can be configured via DHCP, BOOTP, or static IP addresses. The serial interface is connected to the device to be integrated, with signals TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND available for RS-232. Installation requires no additional tools or components.

Operational Advantages

The NE-4120S-T offers high reliability and long service life, highlighted by the MTBF of up to 290,276 hours. The low power consumption and compact design reduce space requirements and operating costs. Support for multiple operating systems and protocols enables flexible integration into existing IT infrastructures. Integrated alerts via SNMP and email simplify remote monitoring and fault diagnosis.

Certifications and Environmental Standards

The device complies with required EMC and EMS standards, including EN 55032/24, FCC Part 15B, CISPR 32, and IEC 61000-4-2/3/4/5/6/8. Environmental certifications RoHS, CRoHS, and WEEE ensure environmentally compatible manufacturing and disposal. The operating temperature ranges of 0–55 °C (standard) and -40–75 °C (wide temperature) enable use in various industrial environments.

Manufacturer Warranty

The manufacturer’s warranty is 5 years, underscoring the high quality and reliability of the device. The warranty covers defects in materials and workmanship that occur within the warranty period.

Scope of Delivery

The scope of delivery includes 1 × NE-4100 Series Embedded Device Server.