General
Number of serial ports	8
Ethernet port count	1
Air humidity	5–95 % (nicht kondensierend)
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2

The Moxa NPort 5650-8-T is a Device-Server with eight serial ports, specifically designed for integrating RS-232/422/485 devices into Ethernet networks. The device is designed for demanding industrial environments and features an extended operating temperature range of -40 to 75 °C, making it suitable for extreme environmental conditions. The robust metal housing and mounting in a 19-inch rack ensure high mechanical stability and durability. The integrated Watchdog function enhances operational reliability by automatically triggering a restart in case of system failures. Configuration is performed via a web console (HTTP/HTTPS), Telnet, or a Windows utility, enabling flexible and platform-independent setup.

Applications include networking industrial controls, measuring instruments, sensors, and other serial end devices within existing Ethernet infrastructures. The NPort 5650-8-T is particularly suitable for applications in manufacturing, energy supply, transportation, and building automation, where reliable and low-maintenance communication is required. Support for various serial standards (RS-232, RS-422, RS-485) enables connection to different devices, with data direction control handled automatically (ADDC). Baud rates can be set between 50 bps and 921.6 kbps, allowing flexible adaptation to various device speeds.

Functions and features in detail include eight serial RJ45 connectors (8-pin), each configurable for RS-232, RS-422, or RS-485. Serial signals include TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND (RS-232), Tx±, Rx±, GND (RS-422), and Data±, GND (RS-485-2w). Flow control can be configured via RTS/CTS, DTR/DSR, or XON/XOFF. For RS-485, integrated pull-up/down resistors of 1 kΩ / 150 kΩ and a 120 Ω terminator are provided. Operating modes include Real COM, TCP Client/Server, UDP, RFC2217, Reverse Telnet, and Pair Connection, offering a flexible communication interface.

Technology explained simply shows that the NPort 5650-8-T features an Ethernet interface with 10/100BaseT(X) and an RJ45 port. Integrated magnetic isolation of 1.5 kV protects against transient voltage surges and enhances electromagnetic immunity. Network protocols include TCP/IP, UDP, ICMP, ARP, DHCP, DNS, SNMPv1/v2c, SNMPv3, HTTP/HTTPS, LLDP, RFC2217, Rtelnet, PPP, SLIP, and SMTP. Time management is handled via SNTP, enabling synchronized time control within the network. Security features include authentication via a local database, encryption using AES-128, RSA-1024, and SHA-1/256, as well as HTTPS (TLS 1.2) and SNMPv3, protecting data transmission.

Compatibility and accessories include comprehensive driver support for various operating systems: Windows (95 to 11, Server 2003 to 2022, Embedded CE 6.0/5.0, XP Embedded), Linux (Kernel 2.4.x to 6.x, Real TTY), macOS (10.12 to 11.x, Fixed TTY), ARM platforms (Kernel 4.x/5.x), and VM support for VMware ESXi, Fusion, and Parallels (macOS up to 11.x). Android support is available from API version 3.1.x. Configuration is done via web console, Telnet, or Windows utility, enabling integration into various system architectures.

Mounting and installation are performed via 19-inch rack mounting. The device measures 480 × 45 × 198 mm with mounting bracket and 440 × 45 × 198 mm without. Weight is 2.310 g. Power supply is 100–240 VAC at 47–63 Hz, with input current of 158 mA @ 100 VAC. The operating environment requires humidity of 5–95 % (non-condensing). Certifications include EMC (EN 55032/35), EMI (CISPR 32, FCC Part 15B Class A), EMS (IEC 61000-4-2/-3/-4/-5/-6/-8/-11), Safety (UL 62368-1), and Medical Technology (EN 55011 Class A, EN 60601-1-2). MTBF is 776,469 hours according to MIL-HDBK-217F. Warranty covers 5 years.

Operational advantages include high reliability, easy configuration, broad compatibility with various operating systems, and integrated security functions. The wide operating temperature range and robust metal housing enable use in harsh environments. The integrated Watchdog function ensures high operational reliability, and comprehensive network protocol support facilitates integration into existing IT infrastructures.

Key terms in the text: Device-Server, Ethernet networks, RS-232/422/485, 19-inch rack, Watchdog function, security protocols.