General
Number of ports	18
Buffer size	1 Mbit
Air humidity	5–95 % nicht kondensierend
Auto-negotiation
Auto MDI/MDI-X
STP support
RMON
Syslog
TFTP
DHCP
LLDP
ABC-01-USB Support

The EDS-518A from Moxa is an industrial managed Ethernet switch with a total of 18 ports, specifically developed for use in critical industrial applications where high reliability, bandwidth, and network security are required. The device features 16 Fast-Ethernet ports (10/100BaseT(X)) and two Gigabit Combo ports, which can operate either via RJ45 connectors for copper cables or via SFP slots for fiber optic cables. This combination enables flexible network design, covering both short connections within a building and longer distances over fiber optic links. The ports support Auto-Negotiation and Auto MDI/MDI-X, automatically adjusting the connection to the optimal speed and connection type (crossover or straight-through) without requiring manual intervention.

Applications

The switch is designed for use in demanding industrial environments, such as manufacturing automation, power supply, transportation, or marine applications. The high operating temperature range of -40 to 75 °C (model –T) and support for redundant power supplies make it robust against extreme environmental conditions. Certification according to ATEX and Class I Div. 2 allows use in explosive environments, while certification according to DNV confirms suitability for marine applications.

Functions and Equipment in Detail

The EDS-518A offers extensive network management functions. The switch can be configured and monitored via a Web GUI, CLI, Telnet, RS-232 console, or a Windows utility. The integrated ABC-01-USB configuration backup module enables secure and fast configuration transfer. For network security, features such as IEEE 802.1X, SSH, HTTPS/SSL, RADIUS, TACACS+, and Port Lock are available. Additionally, Broadcast Storm Protection safeguards the network against overloads caused by uncontrolled data transmissions.

Technology Explained Simply

The integrated Turbo Ring and Turbo Chain technology ensures a network recovery time of under 20 ms for up to 250 switches, which is crucial for critical applications requiring high availability. Additionally, standards such as STP, RSTP, and MSTP support network stability. Support for VLANs (up to 64), QoS (802.1p), and Port Trunking enables structured network organization and prioritization of data traffic. The MAC table with 8,000 entries and the 1 Mbit buffer ensure efficient data processing. Support for industrial protocols such as EtherNet/IP, Modbus TCP, and PROFINET IO makes the switch compatible with common automation systems.

Compatibility and Accessories

The switch is compatible with SFP modules, which can be connected via the Gigabit Combo ports to enable fiber optic connections. Support for SNMPv1/v2c/v3, RMON, Syslog, SMTP, TFTP, DHCP, and LLDP enables comprehensive network monitoring and diagnostics. The digital interface provides an alarm contact (1 A @ 24 VDC) and digital inputs with a voltage range of +13 to +30 V (High) and -30 to +3 V (Low), allowing status signals or external signals to be connected to the switch.

Mounting and Installation

The device is housed in a metal housing and offers DIN rail mounting as well as optional wall mounting. The protection rating IP30 protects against contact with foreign objects and against splashing water, but not against dust or direct water ingress. The power supply operates on 12–45 VDC with dual redundant inputs, ensuring high availability even if one power source fails. Integrated protection functions against reverse polarity and overcurrent increase operational safety.

Operational Advantages

The EDS-518A offers high operational reliability through redundant power supply, fast network recovery, and comprehensive security functions. Support for industrial protocols and flexible configuration via various interfaces simplifies integration into existing automation systems. The high MTBF of over 250,000 hours (depending on model) and the 5-year manufacturer’s warranty underscore the reliability of the device. The robust construction and certifications for explosive and marine environments significantly expand the range of applications.