General
Number of serial interfaces	2
Serial interface type	RS-422/485
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
Pull-up/pull-down resistors	1 kΩ fest
Air humidity	5–95 % (nicht kondensierend)
EMC	EN 55032/35

The Moxa NPort 5232I is an industrial Device-Server with two serial ports, specifically designed for integrating RS-422/485 devices into Ethernet-based networks. It enables communication between serial peripheral devices and network systems via IP-based protocols, making it a central component in industrial automation systems as well as applications requiring remote access. The robust metal construction and support for various operating modes make it suitable for demanding environments.

Applications

The NPort 5232I is used in industrial environments where serial devices such as sensors, controls, measuring instruments, or printers need to be integrated into existing networks. It is particularly advantageous in systems featuring RS-422/485 interfaces that require control or monitoring via Ethernet networks. The support for remote access enables remote control and diagnostics of devices, which can reduce maintenance and operational costs.

Functions and Features in Detail

The Device-Server features two serial ports connected via a terminal block. The interfaces support RS-422/485 in 4- and 2-wire technology, with data direction for RS-485 automatically managed by ADDC (automatic data direction control). Baud rates can be set between 110 and 230400 bps, with configurable data formats including 5 to 8 data bits, 1, 1.5, or 2 stop bits, and parity types (none, even, odd, Space, Mark). Flow control is handled via XON/XOFF. The serial signals are fixed with pull-up/pull-down resistors of 1 kΩ.

Technology Explained Simply

The NPort 5232I provides 2-kV isolation for the serial interfaces, achieved optically to prevent electrical interference and overvoltage. The Ethernet interface features 1.5 kV magnetic isolation, offering additional protection against transient voltages. The integrated real-time clock (RTC) and beeper serve as alarm functions to visually and acoustically signal network or device faults. An integrated watchdog timer ensures the device automatically restarts in case of system failures, enhancing operational reliability.

Compatibility and Accessories

The Device-Server supports a wide range of network protocols, including TCP/IP, UDP, ICMP, ARP, DHCP, DNS, HTTP, BOOTP, Telnet, SNMPv1, SNTP, SMTP. Driver support covers operating systems such as Windows (95 to 11), server operating systems, Embedded CE, Linux (2.4.x to 6.x), UNIX, macOS (10.x to 14), Android API from 3.1.x, as well as virtualization platforms like VMware, Parallels, Fusion. Network management functions include SNMPv1 with support for MIBs RFC1213 and RFC1317, enabling integration into existing network management systems.

Mounting and Installation

The device can be mounted on a table, on the wall, or optionally on a DIN rail. The housing is made of metal and provides high mechanical protection. Dimensions are 90 x 100.4 x 35 mm (with mounting ears) or 67 x 100.4 x 35 mm (without). Power supply is via a removable 3-pole terminal block with an input voltage of 12 to 48 VDC. At 12 VDC, the power consumption is 365 mA.

Operational Advantages

The NPort 5232I is characterized by high reliability, evidenced by an MTBF of 309,383 hours (according to Telcordia Standard TR/SR). Security features include authentication via a local database, enabling controlled access to the device. Support for various operating modes such as Real COM, TCP Client/Server, UDP, Reverse Telnet, Ethernet Modem allows flexible adaptation to different application scenarios. Integrated alarm functions and the watchdog timer enhance operational safety in critical installations.

Standards and Certifications

The device complies with EMC directives EN 55032/35, EMI standards CISPR 32 and FCC Class A, and EMS standards IEC 61000-4-2 to -4-11. Safety approval is granted under UL 60950-1, and it holds marine certification according to DNV. Environmental standards RoHS, CRoHS, WEEE are also met. Operating temperature ranges from 0 to 55 °C, storage temperature from -40 to 75 °C, with humidity levels of 5 to 95 % (non-condensing).