Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | EDS-508A-MM-SC |
| Manufacturer | Moxa |
| Product Series | EDS-508A |
| Switch Type | Managed Layer 2 Ethernet switch |
| Copper Ethernet Ports | 6 × 10/100BaseT(X), RJ45 |
| Fiber Ethernet Ports | 2 × 100BaseFX, multimode, SC |
| Fiber Wavelength | 1300 nm typical |
| Fiber Transmission Distance | Up to 4 km with OM1 fiber; up to 5 km with 50/125 μm fiber, subject to link conditions |
| Ethernet Standards | IEEE 802.3, IEEE 802.3u |
| Redundancy | Turbo Ring v1/v2, Turbo Chain, STP, RSTP, MSTP |
| Industrial Protocol Support | EtherNet/IP, Modbus TCP |
| Network Management | SNMP, VLAN, LLDP, RMON, port mirroring |
| Console Interface | RS-232, 10-pin RJ45 |
| Input Voltage | 12/24/48 VDC |
| Operating Voltage | 9.6–60 VDC |
| Power Input | Dual redundant DC inputs |
| Input Current | 0.30 A at 24 VDC |
| Alarm Contacts | 2 relay outputs, 1 A at 24 VDC |
| Digital Inputs | 2 |
| Operating Temperature | -10 to 60°C |
| Storage Temperature | -40 to 85°C |
| Protection Rating | IP30 |
| Housing | Metal |
| Dimensions | 80.2 × 135 × 105 mm |
| Weight | 1,040 g |
| Installation | DIN-rail mounting; optional wall-mounting kit |
Specifications are based on Moxa’s official product documentation. Fiber distance depends on fiber type, optical loss, and installation conditions.
Product Introduction
Moxa EDS-508A-MM-SC Managed Industrial Ethernet Switch
The Moxa EDS-508A-MM-SC is a managed Ethernet switch designed for industrial control networks requiring both copper and fiber-optic connections. Its six RJ45 ports support 10/100 Mbps Ethernet devices, while two multimode SC fiber ports provide optical links between control cabinets, network segments, or distributed automation equipment.
The switch supports VLAN configuration, traffic prioritization, SNMP management, and multiple network redundancy protocols. Moxa’s Turbo Ring and Turbo Chain technologies support network recovery in redundant topologies, making this model suitable for industrial communication systems where network interruptions can affect equipment availability.
EDS-508A-MM-SC
Application Scenarios & Field Pitfalls
The EDS-508A-MM-SC is useful in installations where copper Ethernet devices need to communicate across fiber links. Its multimode optical interfaces can help extend network connections between cabinets or equipment areas while reducing exposure to electromagnetic interference along the fiber route.
Typical application scenarios
- PLC and remote I/O networks: Connects Ethernet-enabled controllers, remote I/O stations, and supervisory equipment.
- Industrial control cabinets: Provides local switching for PLCs, HMIs, drives, and network gateways.
- Distributed production lines: Uses multimode fiber connections to link separate machine areas or control cabinets.
- Redundant automation networks: Supports Turbo Ring, Turbo Chain, RSTP, and other redundancy methods for network resilience.
Field Pitfalls
- Match the fiber type and connector. This model uses multimode 100BaseFX with SC connectors. It is not a direct substitute for single-mode SC or multimode ST versions. Check the installed fiber grade, connector condition, wavelength, and optical link budget before commissioning.
- Check the DC supply arrangement. The switch supports 12/24/48 VDC nominal input and redundant power connections. Confirm polarity and terminal wiring before energizing. Its specified operating voltage is 9.6–60 VDC.
- Preserve the network configuration. Record VLAN assignments, ring roles, port settings, management addresses, and firmware information before replacing a managed switch. A physically compatible unit may not restore network operation if its configuration differs.
Related Products
The following models belong to the Moxa EDS-508A family. They share the platform but differ in fiber interfaces or operating-temperature ratings; they should not be treated as automatic drop-in replacements.
- -MM-SC-T — Similar six-copper/two-multimode-SC arrangement, rated for -40 to 75°C.
- -MM-ST — Multimode fiber version using ST connectors rather than SC.
- -SS-SC — Single-mode fiber version with SC connectors.
- -SS-SC-80 — Single-mode SC version designed for longer-distance fiber links.
The model differences are documented in Moxa’s family selection information.
Procurement and replacement note: When sourcing an -MM-SC, verify the complete model suffix, hardware revision, fiber-port type, and operating-temperature rating. For an existing installation, also confirm the firmware and saved network configuration before putting the replacement into service.
