General
Serial ports	4
Serial standards	RS-232/RS-422/RS-485
Ethernet connection	RJ45
Ethernet isolation	1.5 kV
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
Safety certifications	UL 62368-1

The Moxa NPort 5450 is a Device-Server of the NPort 5400 series, specifically designed for the professional connection of up to four serial devices to an Ethernet network. It enables the integration of legacy or serial devices, such as sensors, controls or industrial machines, into modern IP-based networks. The device features four serial ports, which depending on the model support RS-232, RS-422 and RS-485, allowing flexible connection to various peripheral devices. The serial interfaces are implemented via DB9 connectors, representing a standard connection in the industry. The Ethernet interface provides a 10/100BaseT(X) connection via RJ45 and is equipped with 1.5 kV isolation to protect against electrical interference and overvoltage.

Applications

The NPort 5450 is suitable for industrial environments where serial devices need to be controlled or monitored over a network. Typical application scenarios include remote machine maintenance, integration of measuring devices into a network, or communication with older control systems that lack an Ethernet interface. The support for RS-485 makes it particularly suitable for long-distance connections and noise-resistant transmissions in industrial facilities. The dual power supply inputs (screw terminal and hollow pin) increase reliability, especially in critical applications where redundant power supply is required.

Functions and Equipment in Detail

The device offers multiple operating modes per port, including Real COM, TCP Server/Client, UDP, Ethernet Modem, Reverse Telnet, and Pair Connection, allowing flexible adaptation to various network architectures. Serial parameters are extensively configurable: baud rates from 50 bps to 921.6 kbps, data bits (5–8), stop bits (1, 1.5, 2), parity (None, Even, Odd, Space, Mark), as well as flow control methods such as RTS/CTS, DTR/DSR, and XON/XOFF are adjustable. For RS-485 applications, an ADDC control is integrated, and resistors (120 Ohm terminator, Pull High/Low 1 kΩ or 150 kΩ) are configurable to optimize signal quality.

Technology Explained Simply

The Ethernet interface enables the transmission of serial data over IP networks, eliminating the need for physical cable connections between devices. The 1.5 kV isolation protects the device from electrical disturbances caused by inductive or capacitive coupling. The dual power supply inputs provide redundant power supply, which is important in critical installations to prevent failures. The RS-485 support allows connections over long distances (up to several hundred meters) with high noise immunity, which is advantageous in industrial environments with electromagnetic interference.

Compatibility and Accessories

The NPort 5450 is compatible with a wide range of operating systems, including Windows (95 to 11, Server 2000–2022), Linux (Kernel 2.4–6.x), macOS (10.12–11.x), various UNIX systems (SCO, QNX, Solaris, FreeBSD, AIX, HP-UX), Android from version 3.1.x, as well as virtualization platforms such as VMware, Parallels, and Fusion. Network management is performed via HTTP/HTTPS, Telnet, or the Windows Utility, making configuration and monitoring of the device simple and centralized. Support for SNMPv1/v2c/v3, LLDP, IGMP, DHCP, and SMTP extends functionality for network management and diagnostics.

Mounting and Installation

The device is housed in a metal housing and can be mounted on the desktop, on the wall, or optionally on a DIN rail. Dimensions are 181 × 103 × 33 mm (with mounting ears) or 158 × 103 × 33 mm (without). Mounting is done via integrated mounting ears, with a wall mounting kit included in the delivery. Power supply is via 12–48 VDC, with 24 VDC also approved for marine applications (DNV). Power consumption is 365 mA.

Advantages in Operation

The NPort 5450 offers high reliability with an MTBF of up to 1,213,993 hours at 25 °C. The operating temperature in the standard model ranges from 0 to 55 °C, while special -T models are designed for use from -40 to 75 °C. The relative humidity may range from 5 to 95 % (non-condensing). Certifications include EMC (EN 55032/35, CISPR, FCC), EMS (IEC 61000-4-x), Safety (UL 62368-1), Medical Technology (EN 60601-1-2 for 5410, 5450, 5450I), and Maritime (DNV). The 5-year warranty underscores the quality and longevity of the device.

Scope of Delivery

Included in the delivery: 1 × NPort 5400 device server, 1 × power supply cable (CBL-PJTB-10), 1 × wall mounting kit, 1 × quick start guide, and 1 × warranty card.