General
Number of Ethernet ports	8
Buffer size	1 Mbit
Power consumption @ 12 VDC	0,61 A
Air humidity	5–95 % nicht kondensierend
Auto-negotiation
Full/Half Duplex
Auto MDI/MDI-X

The EDS-408A-SS-SC-T is an industrial managed Ethernet switch from the brand Moxa, specifically designed for use in demanding industrial environments. The device features a total of eight network ports, consisting of six Fast Ethernet ports (10/100BaseT(X)) with RJ45 connectors and two fiber optic ports with singlemode SC connectors. This combination enables flexible network integration, with the fiber ports suitable for longer transmission distances and the RJ45 ports for local connections. Support for Auto-Negotiation, Full- and Half-Duplex mode, as well as Auto MDI/MDI-X, ensures simple and automatic adaptation to connected devices. The switch is designed for use in critical infrastructures such as transportation infrastructure, power distribution, and outdoor applications, which is guaranteed by the extended operating temperature range of -40 to 75 °C.

Applications

The EDS-408A-SS-SC-T is suitable for industrial automation networks with high availability requirements. Its robust construction and certifications for hazardous environments, such as ATEX, Class I Div 2 and IECEx, make it suitable for use in explosive atmospheres. Additionally, the device complies with standards for railway technology (EN 50121-4), transportation (NEMA TS2), and marine applications (NK, DNV), ensuring its applicability across various industries. Mounting is standard on a DIN rail, with optional wall mounting available.

Functions and Features in Detail

The device offers extensive networking functions, including Turbo Ring and Turbo Chain, which enable a recovery time of under 20 ms. These functions are particularly important for critical applications where rapid network recovery after a fault is required. Additionally, the switch supports RSTP and STP to manage redundant network topologies. For industrial communication, EtherNet/IP and Modbus TCP are integrated, facilitating integration into existing automation systems. Support for VLANs (802.1Q, port-based, GMRP, GVRP) and IGMP Snooping enables efficient network segmentation and multicast management.

Technical Explanation

Network performance is supported by a MAC address table with 8,000 entries and a buffer size of 1 Mbit, ensuring stable data transmission even under heavy loads. Priority queues (4 Queues) enable port-based QoS to prioritize critical data streams. The serial console via RS-232 (10-pin RJ45, 115200, n, 8, 1) provides direct access for configuration and maintenance. DIP switches allow manual setting of functions such as Turbo Ring, Master, Coupler, and Reserve, making network configuration flexible.

Compatibility and Accessories

The switch is equipped with a redundant power supply supporting input voltages of 12/24/48 VDC (operating voltage: 9.6–60 VDC). The power supply includes overcurrent and reverse polarity protection to prevent damage to the device. Power consumption is 0.61 A at 12 VDC, 0.3 A at 24 VDC, and 0.16 A at 48 VDC. Certifications include EMC/EMI (EN 55032/35, CISPR 32, FCC Part 15B Class A), EMS (IEC 61000-4-2/3/4/5/6/8), as well as vibration/shock/fall (IEC 60068-2-6/27/31). Safety certification UL 508 and approvals for hazardous environments (ATEX, Class I Div 2, IECEx) underscore the device's reliability.

Mounting and Installation

Mounting is standard on a DIN rail, with optional wall mounting available. The housing is made of metal and offers IP30 protection, safeguarding against dust and light splashing water. Dimensions are 53.6 × 135 × 105 mm, weight 650 g. Installation requires no special tools, as mounting is done via the DIN rail. The serial console allows direct configuration, with remote management also possible via SNMPv1/v2c/v3, Telnet, LLDP, and Port Mirroring.

Operational Advantages

The EDS-408A-SS-SC-T offers high operational reliability through redundant power supply, extended temperature range, and comprehensive certifications. Rapid network recovery via Turbo Ring and Turbo Chain, along with support for EtherNet/IP and Modbus TCP, facilitates integration into industrial automation systems. Security features such as HTTPS/SSL, SSH, SNMPv3, Port Lock, and Broadcast Storm Protection protect the network from unauthorized access and disturbances. The MTBF is 1,253,072 hours (according to Telcordia, GB), highlighting the device's high reliability. The warranty period is 5 years.

Certifications

The device complies with numerous international standards, including UL 508 (safety), EN 55032/35, CISPR 32, FCC Part 15B Class A (EMC/EMI), IEC 61000-4-2/3/4/5/6/8 (EMS), ATEX, Class I Div 2, IECEx (hazardous environments), EN 50121-4 (railway technology), NEMA TS2 (transportation), IEC 60068-2-6/27/31 (vibration/shock/fall), as well as NK, DNV (marine applications).