EDS-205A-S-SC – MOXA Unmanaged Switches

USD $ 207.48


Manufacturer Part Number: MOXA EDS-205A-S-SC
OEM Spec Ref 

The MOXA EDS-205A-S-SC is a robust unmanaged Ethernet switch designed to ensure reliable network performance in harsh industrial environments. This device is equipped with four 10/100BaseT(X) ports and one 100BaseFX single-mode port, making it ideal for a variety of industrial applications.

Key Features:

  • Versatile Connectivity: Offers both copper and fiber optic connections, with auto-negotiation of speed and duplex modes.
  • Industrial-Grade Design: Features a rugged aluminum housing rated IP30, ensuring durability against environmental challenges.
  • Advanced Network Protection: Supports features like broadcast storm protection to maintain network integrity under high traffic conditions.


  • Reliable Performance: Operates efficiently within a temperature range of -10 to 60°C, catering to demanding industrial settings.
  • Easy Installation: Can be mounted on a DIN rail or wall, providing flexibility in installation according to space requirements.
  • Enhanced Safety and Compliance: Meets various industrial safety and environmental standards, including ATEX and IECEx for hazardous locations.


  • Manufacturing: Ideal for integrating into automation networks that require dependable data transmission.
  • Transportation and Maritime: Suitable for deployment in environments with stringent regulatory requirements.
  • Energy and Utilities: Ensures continuous operation in energy distribution networks, even in outdoor or semi-outdoor setups.

This EDS-205A-S-SC switch exemplifies MOXA’s commitment to delivering high-quality networking solutions that enhance the reliability and security of industrial communications systems.


Ethernet Interface 10/100BaseT(X) Ports (RJ45 connector) 4
Auto negotiation speed
Full/Half duplex mode
Auto MDI/MDI-X connection
100BaseFX Ports (single-mode SC connector) 1
Standards IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for flow control
Optical Fiber Refer table 2
Switch Properties MAC Table Size 1K
Packet Buffer Size 384 kbits
Processing Type Store and Forward
Power Parameters Connection 1 removable 4-contact terminal block
Input Current 0.1 A @ 24 VDC
Input Voltage 12/24/48 VDC
Redundant dual inputs
Operating Voltage 9.6 to 60 VDC
Overload Current Protection Supported
Reverse Polarity Protection Supported
DIP Switch Configuration Ethernet Interface Broadcast storm protection
Physical Characteristics Housing Aluminum
IP Rating IP30
Dimensions 30 x 115 x 70 mm (1.18 x 4.52 x 2.76 in)
Weight 175 g (0.39 lb)
Installation DIN-rail mounting
Wall mounting (with optional kit)
Environmental Limits Operating Temperature -10 to 60°C (14 to 140°F)
Storage Temperature (package included) -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standards and Certifications EMC EN 55032/24
EMI CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
IEC 61000-4-4 EFT: Power: 2 kV; Signal: 1 kV
IEC 61000-4-5 Surge: Power: 2 kV; Signal: 2 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
Hazardous Locations IECEx
Class I Division 2
Maritime ABS
Railway EN 50121-4
Safety UL 508
Shock IEC 60068-2-27
Traffic Control NEMA TS2
Vibration IEC 60068-2-6
Freefall IEC 60068-2-31
MTBF Time 3,045,679 hours
Standards Telcordia (Bellcore), GB
Warranty Warranty Period 5 years
Details See www.moxa.com/warranty


Optical Fiber

Multi-Mode Single-Mode
Fiber Cable Type OM1 50/125 µm G.652
800 MHz x km
Typical Distance 4 km 5 km 40 km
Wavelength Typical (nm) 1300 1310
TX Range (nm) 1260 to 1360 1280 to 1340
RX Range (nm) 1100 to 1600 1100 to 1600
Optical Power TX Range (dBm) -10 to -20 0 to -5
RX Range (dBm) -3 to -32 -3 to -34
Link Budget (dB) 12 29
Dispersion Penalty (dB) 3 1

Note: When connecting a single-mode fiber transceiver, we recommend using an attenuator to prevent damage caused by excessive optical power.
Note: Compute the “typical distance” of a specific fiber transceiver as follows: Link budget (dB) > dispersion penalty (dB) + total link loss (dB).

Weight 0.175 kg
Dimensions 3 × 11.5 × 7 cm