General
Number of serial ports	8
Operating temperature	0–55 °C

The Moxa NPort 6610-8 is a Device-Server of the NPort 6600 series, specifically designed for the secure and reliable connection of serial RS-232/422/485 devices to Ethernet networks. It connects industrial communication devices such as sensors, controls, or measuring instruments with modern network infrastructures, enabling central monitoring and control via IP-based protocols. The series is particularly aimed at users in the industry who have high requirements for security, reliability, and scalability.

Applications

The NPort 6610-8 is suitable for industrial environments where serial devices need to be integrated into a network, for example in manufacturing automation, energy supply, building technology, or transportation. Its robust design and high EMC resistance make it suitable for noisy environments. Support for IPv6 and redundant networks via STP/RSTP/Turbo Ring increases availability in critical applications.

Functions and Features in Detail

The device features 8 serial ports, each of which can be individually configured as RS-232, RS-422, or RS-485. The baud rate can be set between 50 bps and 921.6 kbps, including non-standard values. Each port has an internal 64-KB buffer that prevents data loss during short network outages. Signal quality in RS-485 networks is optimized by adjustable resistors (via DIP switches), which is especially important in noisy environments. An integrated LCD panel and control buttons allow for easy IP configuration directly on the device.

Technology Explained Simply

The NPort 6610-8 operates as a terminal server, converting serial data into IP packets and transmitting them over an Ethernet network. The network interface is a 10/100BaseT(X) RJ45 port with 1.5 kV isolation, providing high electrical safety. Communication occurs via IPv4 and IPv6, supporting protocols such as DHCP, DNS, HTTP(S), Telnet, and SSH. Security is ensured through encrypted transmissions using TLS, SSHv2, AES-128/256, SHA-1/256/384, RSA-1024, and HMAC. Authentication is performed locally or via RADIUS and TACACS+. Configuration is possible via various interfaces: web interface, Telnet, SSH, DSU, MCC, and CLI.

Compatibility and Accessories

The Device-Server is compatible with a wide range of operating systems, including Windows, Linux, macOS, UNIX, Android, VMware, and CE. Expandability via NM modules enables integration with fiber-optic networks. An SD card slot (up to 32 GB) provides additional storage space, for example for logs or firmware updates. Connection to serial devices is made via 8-pin RJ45 connectors, with a DB9 connector to RJ45 cable included in the delivery scope.

Mounting and Installation

The device features a robust metal housing designed for rack mounting (6600 series). Dimensions are 440 x 195 x 44 mm (without ears). The delivery includes two rack brackets, enabling installation in a 19-inch rack. Installation is performed via the integrated LCD panel or network tools. Power supply is provided via a model-dependent power cable or power adapter, also included in the delivery scope.

Operational Advantages

The NPort 6610-8 offers high availability through redundant networks and a large buffer per port. Flexible configuration of serial interfaces and support for many operating systems increases flexibility. Integrated security with encrypted protocols protects sensitive data. The robust design and certification according to IEC 61000-4-x, CISPR 32, and FCC Part 15B ensure reliable operation in industrial environments. The MTBF is up to 850,000 hours, indicating a long service life and low maintenance frequency.

Certifications and Environmental Standards

The device complies with safety standards UL 60950-1 and NEMA TS2. It is also RoHS, CRoHS, and WEEE compliant, ensuring environmental compatibility and regulated disposal. The operating temperature is 0–55 °C (standard model), with -HV models operable from -40–85 °C. Humidity is 5–95 % (non-condensing).

Delivery Contents

Included in the delivery: 1 x NPort 6610-8 Device-Server, 2 x rack brackets, 1 x DB9 connector to RJ45 cable, 1 x power cable or power adapter (model-dependent), 1 x quick start guide, and 1 x warranty card.