EDS-308 Series

8-port unmanaged Ethernet switches

Features and Benefits

Relay output warning for power failure and port break alarm
Broadcast storm protection
-40 to 75°C wide operating temperature range (-T models)

Certifications

Introduction

The EDS-308 Ethernet switches provide an economical solution for your industrial Ethernet connections. These 8-port switches come with a built-in relay warning function that alerts network engineers when power failures or port breaks occur. In addition, the switches are designed for harsh industrial environments, such as the hazardous locations defined by the Class 1 Div. 2 and ATEX Zone 2 standards.

The switches comply with FCC, UL, and CE standards and support either a standard operating temperature range of -10 to 60°C or a wide operating temperature range of -40 to 75°C. All switches in the series undergo a 100% burn-in test to ensure that they fulfill the special needs of industrial automation control applications. The EDS-308 switches can be installed easily on a DIN rail or in a distribution box.

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Alarm Contact Channels

1 relay output with current carrying capacity of 1 A @ 24 VDC

10/100BaseT(X) Ports (RJ45 connector)

EDS-308/308-T: 8
EDS-308-M-SC/308-M-SC-T/308-S-SC/308-S-SC-T/308-S-SC-80: 7
EDS-308-MM-SC/308-MM-SC-T/308-MM-ST/308-MM-ST-T/308-SS-SC/308-SS-SC-T/308-SS-SC-80: 6

All models support:
Auto negotiation speed
Full/Half duplex mode
Auto MDI/MDI-X connection
100BaseFX Ports (multi-mode SC connector)

EDS-308-M-SC: 1
EDS-308-M-SC-T: 1
EDS-308-MM-SC: 2
EDS-308-MM-SC-T: 2
100BaseFX Ports (multi-mode ST connector)

EDS-308-MM-ST: 2
EDS-308-MM-ST-T: 2
100BaseFX Ports (single-mode SC connector)

EDS-308-S-SC: 1
EDS-308-S-SC-T: 1
EDS-308-SS-SC: 2
EDS-308-SS-SC-T: 2
100BaseFX Ports (single-mode SC connector, 80 km)

EDS-308-S-SC-80: 1
EDS-308-SS-SC-80: 2
Standards

IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for flow control

Optical Fiber

		100BaseFX
		Multi-Mode		Single-Mode (40 km)	Single-Mode (80 km)
Fiber Cable Type		OM1	50/125 µm	G.652	G.652
Fiber Cable Type		OM1	800 MHz x km	G.652	G.652
Typical Distance		4 km	5 km	40 km	80 km
Wavelength	Typical (nm)	1300		1310	1550
	TX Range (nm)	1260 to 1360		1280 to 1340	1530 to 1570
	RX Range (nm)	1100 to 1600		1100 to 1600	1100 to 1600
Optical Power	TX Range (dBm)	-10 to -20		0 to -5	0 to -5
	RX Range (dBm)	-3 to -32		-3 to -34	-3 to -34
	Link Budget (dB)	12		29	29
	Dispersion Penalty (dB)	3		1	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).

Ethernet Interface

Port break alarm

MAC Table Size

2 kbits
Packet Buffer Size

768 K
Processing Type

Store and Forward

Input Current

EDS-308/308-T: 0.07 A @ 24 VDC
EDS-308-M-SC: 0.11 A @ 24 VDC
EDS-308-S-SC/308-S-SC-80: 0.12 A @ 24 VDC
EDS-308-MM-SC/MM-ST/SS-SC/308-SS-SC-80: 0.15 A @ 24 VDC
Connection

1 removable 6-contact terminal block(s)
Operating Voltage

9.6 to 60 VDC
Input Voltage

Redundant dual inputs
12/24/48 VDC
Reverse Polarity Protection

Supported
Overload Current Protection

Supported

Housing

Metal
IP Rating

IP30
Dimensions

53.6 x 135 x 105 mm (2.11 x 5.31 x 4.13 in)
Weight

790 g (1.75 lb)
Installation

DIN-rail mounting
Wall mounting (with optional kit)

Operating Temperature

Standard Models: -10 to 60°C (14 to 140°F)
Wide Temp. Models: -40 to 75°C (-40 to 167°F)
Storage Temperature (package included)

-40 to 85°C (-40 to 185°F)
Ambient Relative Humidity

5 to 95% (non-condensing)

Safety

UL 508
UL 60950-1
CSA C22.2 No. 60950-1
EN 62368 (LVD)
EMC

EN 55032/35
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 MHz: 20 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
Hazardous Locations

ATEX
Class I Division 2
Vibration

IEC 60068-2-6
Shock

IEC 60068-2-27
Freefall

IEC 60068-2-32
Maritime

DNV

Time

EDS-308/308-T: 2,972,907 hrs
EDS-308-M-SC/308-M-SC-T/308-S-SC/308-S-SC-T/308-S-SC-80: 2,646,710 hrs
EDS-308-MM-SC/308-MM-SC-T/308-MM-ST/308-MM-ST-T/308-SS-SC/308-SS-SC-T/308-SS-SC-80: 2,382,553 hrs
Standards

MIL-HDBK-217F

Warranty Period

5 years
Details

See www.moxa.com/warranty

Download datasheet

Support Documents

Name	Type	Version	Release Date
Datasheet for EDS-308 Series Download 818.6 KB	Datasheet	v1.4	Aug 26, 2025 Aug 26, 2025
QIG for EDS-308/EDS-309 Series Download 2.3 MB	QIG	v11.4	Mar 11, 2025 Mar 11, 2025
Declaration of Conformity (EU/UK) for EDS-308 Series Download 312.6 KB	Declaration	v1.0	Feb 02, 2024 Feb 02, 2024
2D CAD for EDS-308 Series (V2.0) Download 295.9 KB	2D CAD		Apr 08, 2019 Apr 08, 2019
2D CAD for EDS-308 Series (EDS-308-M-SC V2.0) Download 290.6 KB	2D CAD		Apr 08, 2019 Apr 08, 2019
2D CAD for EDS-308 Series (EDS-308-MM-SC V2.0) Download 283.0 KB	2D CAD		Apr 08, 2019 Apr 08, 2019
2D CAD for EDS-308 Series (EDS-308-MM-ST V2.0) Download 285.6 KB	2D CAD		Apr 08, 2019 Apr 08, 2019
Tech Note: Recommended Procedure for STP Cable Grounding on Moxa's Industrial Ethernet Switches Download 558.3 KB	Tech Note	v1.0	Feb 12, 2019 Feb 12, 2019
2D CAD for EDS-308-M-SC Download 292.2 KB	2D CAD		Jan 19, 2018 Jan 19, 2018
2D CAD for EDS-308-MM-ST Download 286.8 KB	2D CAD		Jan 19, 2018 Jan 19, 2018
2D CAD for EDS-308-M-ST Download 295.8 KB	2D CAD		Jan 19, 2018 Jan 19, 2018
2D CAD for EDS-308 Download 297.9 KB	2D CAD		Jan 19, 2018 Jan 19, 2018
2D CAD for EDS-308-MM-SC Download 284.3 KB	2D CAD		Jan 19, 2018 Jan 19, 2018

Industrial Network Infrastructure Brochure

Technology Guide

Industrial Connectivity and Networking 101

White Paper

Six Tips on How to Lower the Total Cost of Ownership of Industrial IoT Networks

Available Models (14)

Show Images

	Compare EDS-308	Compare EDS-308-T	Compare EDS-308-M-SC	Compare EDS-308-M-SC-T
10/100BaseT(X) Ports RJ45 Connector	8	8	7	7
100BaseFX Ports Multi-Mode, SC Connector	–	–	1	1
100BaseFX Ports Multi-Mode, ST Connector	–	–	–	–
100BaseFX Ports Single-Mode, SC Connector	–	–	–	–
Operating Temp.	-10 to 60°C	-40 to 75°C	-10 to 60°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare EDS-308-MM-SC	Compare EDS-308-MM-SC-T	Compare EDS-308-MM-ST	Compare EDS-308-MM-ST-T
10/100BaseT(X) Ports RJ45 Connector	6	6	6	6
100BaseFX Ports Multi-Mode, SC Connector	2	2	–	–
100BaseFX Ports Multi-Mode, ST Connector	–	–	2	2
100BaseFX Ports Single-Mode, SC Connector	–	–	–	–
Operating Temp.	-10 to 60°C	-40 to 75°C	-10 to 60°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare EDS-308-S-SC	Compare EDS-308-S-SC-T	Compare EDS-308-SS-SC	Compare EDS-308-SS-SC-T
10/100BaseT(X) Ports RJ45 Connector	7	7	6	6
100BaseFX Ports Multi-Mode, SC Connector	–	–	–	–
100BaseFX Ports Multi-Mode, ST Connector	–	–	–	–
100BaseFX Ports Single-Mode, SC Connector	1	1	2	2
Operating Temp.	-10 to 60°C	-40 to 75°C	-10 to 60°C	-40 to 75°C
	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag	Add to Quote View Bag

	Compare EDS-308-S-SC-80	Compare EDS-308-SS-SC-80
10/100BaseT(X) Ports RJ45 Connector	7	6
100BaseFX Ports Multi-Mode, SC Connector	–	–
100BaseFX Ports Multi-Mode, ST Connector	–	–
100BaseFX Ports Single-Mode, SC Connector	1	2
Operating Temp.	-10 to 60°C	-10 to 60°C
	Add to Quote View Bag	Add to Quote View Bag

EDS-308 Series

Features and Benefits

Certifications

Introduction

Input/Output Interface

Alarm Contact Channels

Ethernet Interface

10/100BaseT(X) Ports (RJ45 connector)

100BaseFX Ports (multi-mode SC connector)

100BaseFX Ports (multi-mode ST connector)

100BaseFX Ports (single-mode SC connector)

100BaseFX Ports (single-mode SC connector, 80 km)

Standards

Optical Fiber

DIP Switch Configuration

Ethernet Interface

Switch Properties

MAC Table Size

Packet Buffer Size

Processing Type

Power Parameters

Input Current

Connection

Operating Voltage

Input Voltage

Reverse Polarity Protection

Overload Current Protection

Physical Characteristics

Housing

IP Rating

Dimensions

Weight

Installation

Environmental Limits

Operating Temperature

Storage Temperature (package included)

Ambient Relative Humidity

Standards and Certifications

Safety

EMC

EMI

EMS

Hazardous Locations

Vibration

Shock

Freefall

Maritime

MTBF

Time

Standards

Warranty

Warranty Period

Details