Moxa EDS-205A/208A Series: Industrial Ethernet Switch Quick Installation Guide

Overview

The EDS-205A/208A series of industrial Ethernet switches are entry-level industrial 5 and 8-port Ethernet switches that support IEEE 802.3, IEEE 802.3u, and IEEE 802.3x with 10/100M, full/half-duplex, and MDI/MDIX auto-sensing.

The EDS-205A/208A series provides 12/24/48 VDC (9.6 to 60 VDC) redundant power inputs. The switches are available with a standard operating temperature range from -10 to 60°C, or with a wide operating temperature range from -40 to 75°C, and IP30 metal housing makes them rugged enough for any harsh industrial environment.

To provide greater versatility for use with applications from different industries, the EDS-205A/208A also allow users to enable or disable broadcast storm protection with DIP switches on the outer panel. The EDS-205A/208A switches can be easily installed with DIN-Rail mounting as well as distribution boxes. The DIN-rail mounting capability and IP30 metal housing with LED indicators make the plug-and-play EDS-205A/208A switches reliable and easy to use.

NOTE: Throughout this Hardware Installation Guide, EDS is used as an abbreviation for Moxa EtherDevice Switch.

ATTENTION

⚠️ This device complies with part 15 of FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Package Checklist

Your EDS is shipped with the following items. If any of these items is missing or damaged, please contact your customer service representative for assistance.

• Moxa EtherDevice™ Switch
• Quick installation guide (printed)
• Warranty card

Panel Layout of EDS-205A/208A (Standard)

Front Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. Heat dissipation orifices
• 4. DIP Switches
• 5. Power input P1 LED
• 6. Power input P2 LED
• 7. 10/100BaseT(X) Port
• 8. TP port's 10/100 Mbps LED
• 9. Model Name
• 10. Screw hole for wall mounting kit
• 11. DIN-Rail Kit

Top Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. Heat dissipation orifices
• 4. DIP Switches

Rear Panel View

• 10. Screw hole for wall mounting kit
• 11. DIN-Rail Kit

Panel Layout of EDS-205A-M-SC/ST

NOTE: The appearance of EDS-205A-S-SC is identical to EDS-205A-M-SC.

Front Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. Heat dissipation orifices
• 4. DIP Switches
• 5. Power input P1 LED
• 6. Power input P2 LED
• 7. 10/100BaseT(X) Port
• 8. TP port's 10/100 Mbps LED
• 9. Model Name
• 10. 100BaseFX Port
• 11. FX port's 100 Mbps LED
• 12. Screw hole for wall mounting kit
• 13. DIN-Rail Kit

Top Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. Heat dissipation orifices
• 4. DIP Switches
• 12. Screw hole for wall mounting kit

Rear Panel View

• 13. DIN-Rail Kit

Panel Layout of EDS-208A-M-SC/ST

NOTE: The appearance of EDS-208A-S-SC is identical to EDS-208A-M-SC.

Front Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. DIP Switches
• 4. Power input P1 LED
• 5. Power input P2 LED
• 6. 10/100BaseT(X) Port
• 7. TP port's 10/100 Mbps LED
• 8. Model Name
• 9. 100BaseFX Port
• 10. FX port's 100 Mbps LED
• 11. Screw hole for wall mounting kit
• 12. DIN-Rail Kit

Top Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. DIP Switches
• 4. Power input P1 LED
• 5. Power input P2 LED

Rear Panel View

• 11. Screw hole for wall mounting kit
• 12. DIN-Rail Kit

Panel Layout of EDS-208A-MM-SC/ST

NOTE: The appearance of EDS-208A-SS-SC is identical to EDS-208A-MM-SC.

Front Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. DIP Switches
• 4. Power input P1 LED
• 5. Power input P2 LED
• 6. 10/100BaseT(X) Port
• 7. TP port's 10/100 Mbps LED
• 8. Model Name
• 9. 100BaseFX Port
• 10. FX port's 100 Mbps LED
• 11. Screw hole for wall mounting kit
• 12. DIN-Rail Kit

Top Panel View

• 1. Grounding screw
• 2. Terminal block for power input P1/P2
• 3. DIP Switches
• 4. Power input P1 LED
• 5. Power input P2 LED

Rear Panel View

• 11. Screw hole for wall mounting kit
• 12. DIN-Rail Kit

Mounting Dimensions

EDS-205A

Dimensions: 30.0 mm (1.2 inches) width, 115.0 mm (4.5 inches) height, 70.0 mm (2.8 inches) depth.

Other dimensions: 30.0 mm (1.2 inches) from top/bottom, 78.8 mm (3.1 inches) width, 44.1 mm (1.7 inches) depth, 21.3 mm (0.8 inches) clearance, 10.0 mm (0.4 inches) clearance. Side view: 18.0 mm (0.7 inches) depth, 33.2 mm (1.3 inches) and 48.4 mm (1.9 inches) clearances.

EDS-208A

Dimensions: 50.0 mm (2.0 inches) width, 114.0 mm (4.5 inches) height, 70.0 mm (2.8 inches) depth.

Other dimensions: 50.0 mm (2.0 inches) from top/bottom, 78.8 mm (3.1 inches) width, 44.1 mm (1.7 inches) depth, 21.3 mm (0.8 inches) clearance, 10.0 mm (0.4 inches) clearance. Side view: 30.5 mm (1.2 inches) depth, 33.2 mm (1.3 inches) and 48.4 mm (1.9 inches) clearances.

Unit = mm (inch)

Mounting Instructions

DIN-Rail Mounting

The aluminum DIN-rail attachment plate should already be fixed to the back panel of the EDS when you take it out of the box. If you need to reattach the DIN-rail attachment plate, ensure the stiff metal spring is situated towards the top.

1️⃣ STEP 1: Insert the top of the DIN-Rail into the slot just below the stiff metal spring.

2️⃣ STEP 2: The DIN-Rail attachment unit will snap into place.

To remove the EDS from the DIN-Rail, reverse Steps 1 and 2.

Wall Mounting (optional)

For some applications, wall mounting the EDS-205A/208A is convenient.

1️⃣ STEP 1: Remove the aluminum DIN-Rail attachment plate from the EDS-205A/208A's rear panel. Attach the wall mount plates as shown in the diagram.

2️⃣ STEP 2: Wall mounting requires 4 screws. Use the switch with wall mount plates attached as a guide to mark screw locations. Screw heads should be less than 6.0 mm in diameter, and shafts should be less than 3.5 mm in diameter.

NOTE: Before tightening screws, ensure the screw head and shank size are suitable by inserting the screw into one of the keyhole-shaped apertures of the wall mounting plates. Do not screw screws in completely; leave about 2 mm for sliding the wall mount panel between the wall and screws.

3️⃣ STEP 3: Once screws are fixed on the wall, insert screw heads through the large parts of the keyhole-shaped apertures, and slide the EDS-205A/208A downwards. Tighten the four screws for stability.

ATEX and IECEx Information

• Certificate number:
  • ATEX: DEMKO 10 ATEX 0909900X
  • IECEx: IECEx UL 14. 0085X (For EDS-205A Series only)
• Ambient range:
  • -40°C ≤ Tamb ≤ 75°C for Models with suffix "-T"
  • -10°C ≤ Tamb ≤ 60°C for Models without suffix "-T"
• Certification string:
  • ATEX: Ex nA IIC T4 Gc
  • IECEx: Ex nA IIC T4 Gc (For EDS-205A Series only)
• Standards covered:
  • EN 60079-0:2012/A11:2013/IEC 60079-0:2011 Ed.6
  • EN 60079-15:2010/IEC 60079-15:2010 Ed.4 (For EDS-205A Series only)
• The conditions of safe usage:
  • Subject devices are to be installed in an ATEX certified IP54 enclosure accessible only with use of a tool and used in an area of not more than pollution degree 2 as defined by EN 60664-1.
  • Provisions shall be made to provide the transient protection device to be set at a level not exceeding 140% of the peak rated voltage.
  • Subject devices must use conductors suitable for use at an ambient temperature of 100°C and must be suitable for the Power Supply Terminal.

NOTE: Suitable for use in Class I, Division 2, Groups A, B, C and D hazardous locations, or nonhazardous locations only.

⚠️ EXPLOSION HAZARD - Do not disconnect equipment while the circuit is live or unless the area is known to be free of ignitable concentrations.

Wiring Requirements

⚠️ EXPLOSION HAZARD - Substitution of any component may impair suitability for Class 1, Division 2

Safety First!

Turn the power off before disconnecting modules or wires. The correct power supply voltage is listed on the product label. Check your power source voltage to ensure it is correct. Do NOT use a voltage greater than specified on the product label. These devices must be supplied by a SELV source as defined in the Low Voltage Directive 2014/35/EU and 2014/30/EU.

Current Calculation

Calculate the maximum possible current in each power wire and common wire. Observe all electrical codes dictating the maximum current allowable for each wire size. If the current exceeds maximum ratings, wiring could overheat, causing serious damage to equipment.

Wiring Practices:

• Use separate paths for power and device wiring. If paths must cross, ensure wires are perpendicular at the intersection.
• NOTE: Do not run signal or communications wiring and power wiring in the same wire conduit. To avoid interference, wires with different signal characteristics should be routed separately.
• Use wire signal type to determine separation. Generally, wires with similar electrical characteristics can be bundled.
• Keep input wiring and output wiring separated.
• Label wiring to all devices when necessary.

Grounding the EtherDevice Switch

Grounding and wire routing help limit noise from electromagnetic interference (EMI). Run the ground connection from the ground screw to the grounding surface prior to connecting devices.

⚠️ This product is intended to be mounted to a well-grounded mounting surface such as a metal panel.

Wiring the Redundant Power Inputs

The top two and bottom two contacts of the 4-contact terminal block connector on the EDS's top panel are used for the two DC inputs. Top and front views of one terminal block connector are shown.

1️⃣ STEP 1: Insert the negative/positive DC wires into the V-/V+ terminals.

2️⃣ STEP 2: To prevent DC wires from pulling loose, use a small flat-blade screwdriver to tighten the wire-clamp screws on the front of the terminal block connector.

3️⃣ STEP 3: Insert the plastic terminal block connector prongs into the terminal block receptor on the EDS's top panel.

⚠️ Before connecting the EtherDevice Switch to the DC power inputs, ensure the DC power source voltage is stable.

NOTE: For use in Pollution Degree 2 Environment or similar environments.

Field Wiring Terminal Markings: Wiring terminals shall be marked for proper connections for power supply and load, or a wiring diagram coded to the terminal marking shall be securely attached to the device. Use Copper Conductors Only. Tighten to 4.5 pound-inches or equivalent. This marking should be adjacent to the terminal or on the wiring diagram.

Communication Connections

The EDS-205A models have 4 or 5 10/100BaseT(X) Ethernet ports, and 1 or 0 (zero) 100 BaseFX multi/single-mode (SC/ST-type connector) fiber ports. The EDS-208A models have 6, 7 or 8 10/100BaseT(X) Ethernet ports, and 2, 1 or 0 (zero) 100 BaseFX multi/single-mode (SC/ST-type connector) fiber ports.

10/100BaseT(X) Ethernet Port Connection

The 10/100BaseT(X) ports on the EDS's front panel connect to Ethernet-enabled devices. Pinouts for MDI (NIC-type) and MDI-X (HUB/Switch-type) ports are shown, along with cable wiring diagrams for straight-through and cross-over Ethernet cables.

MDI Port Pinouts

MDI-X Port Pinouts

8-pin RJ45

Describes the standard 8-pin RJ45 connector.

RJ45 (8-pin) to RJ45 (8-pin) Straight-Through Cable Wiring

Describes the wiring for a straight-through Ethernet cable. Pin 1 (Tx+) on the switch port connects to Pin 1 (Tx+) on the NIC port. Pin 2 (Tx-) connects to Pin 2 (Tx-), Pin 3 (Rx+) connects to Pin 3 (Rx+), and Pin 6 (Rx-) connects to Pin 6 (Rx-).

RJ45 (8-pin) to RJ45 (8-pin) Cross-Over Cable Wiring

Describes the wiring for a cross-over Ethernet cable. Pin 1 (Tx+) on the switch port connects to Pin 3 (Rx+) on the NIC port. Pin 2 (Tx-) connects to Pin 6 (Rx-). Pin 3 (Rx+) connects to Pin 1 (Tx+). Pin 6 (Rx-) connects to Pin 2 (Tx-).

100BaseFX Ethernet Port Connection

The SC/ST port and cable connection is straightforward. Optical signals do not require a circuit to transmit data. One optical line transmits data from device I to device II, and the other transmits data from device II to device I for full-duplex transmission.

Connect the Tx (transmit) port of device I to the Rx (receive) port of device II, and the Rx (receive) port of device I to the Tx (transmit) port of device II. If making your own cable, label the two sides of the same line with the same letter (e.g., A-to-A and B-to-B, or A1-to-A2 and B1-to-B2).

SC-Port Pinouts

Shows transmit (Tx) and receive (Rx) ports for SC connectors.

SC-Port to SC-Port Cable Wiring

Illustrates SC-Port to SC-Port cable wiring, indicating connections A to A and B to B.

ST-Port Pinouts

Shows transmit (Tx) and receive (Rx) ports for ST connectors.

ST-Port to ST-Port Cable Wiring

Illustrates ST-Port to ST-Port cable wiring, indicating connections A to A and B to B.

⚠️ This is a Class 1 Laser/LED product. To avoid causing serious damage to your eyes, do not stare directly into the Laser Beam.

Redundant Power Inputs

Both power inputs can be connected simultaneously to live DC power sources. If one power source fails, the other live source acts as a backup, automatically supplying all of the EDS's power needs.

DIP Switch Settings

EDS-205A/208A DIP Switches

The default setting for each DIP Switch is OFF. The following table explains the effect of setting the DIP Switches to the ON positions.

⚠️ To actively update DIP switch settings, power off and then power on the EDS.

LED Indicators

The front panel of the Moxa EtherDevice Switch contains several LED indicators. The function of each LED is described in the table below.

Auto MDI/MDI-X Connection

The Auto MDI/MDI-X function allows users to connect the EDS's 10/100BaseTX ports to any Ethernet device without needing to pay attention to the type of Ethernet cable used. This means either a straight-through or cross-over cable can be used.

Dual Speed Functionality and Switching

The Moxa EtherDevice Switch's 10/100 Mbps switched RJ45 ports auto-negotiate with the connected device for the fastest data transmission rate supported by both. All Moxa EtherDevice Switch models are plug-and-play, requiring no software configuration at installation or maintenance. The half/full duplex mode for the switched RJ45 ports is user-dependent and changes (by auto-negotiation) to full or half duplex based on the transmission speed supported by the attached device.

Switching, Filtering, and Forwarding

When a packet arrives at a switched port, a decision is made to filter or forward it. Packets with source and destination addresses on the same port segment are filtered to that port, relieving the rest of the network. Packets with destination addresses on another segment are forwarded to the appropriate port and not sent where not needed. Network operation packets (like multicast) are forwarded to all ports. The EDS uses store-and-forward switching, which eliminates bad packets and enables peak performance during heavy network traffic.

Switching and Address Learning

The EDS has an address table that can hold up to 1024 addresses, making it suitable for large networks. The address tables are self-learning, automatically updating node locations as nodes are added, removed, or moved. An address-aging algorithm deletes least-used addresses in favor of newer ones. To reset the address buffer, power down and then power up the unit.

Auto-Negotiation and Speed Sensing

All EDS RJ45 Ethernet ports independently support auto-negotiation for 10BaseT and 100BaseTX modes, operating according to IEEE 802.3u. This allows nodes to operate at different speeds (10 Mbps or 100 Mbps) simultaneously. Auto-negotiation occurs when an RJ45 cable connection is made and each time a LINK is enabled. The EDS advertises its speed capabilities, expecting similar advertising from the connected device. If connected to a non-negotiating device, it defaults to 10 Mbps speed and half-duplex mode, as required by IEEE 802.3u.

Specifications

Technology

Interface

Optical Fiber (100Base FX)

Note: When connecting 40 km single-mode fiber over a short distance, use an attenuator to prevent transceiver damage from excessive optical power.

Typical Distance Formula: Link budget(dB) > dispersion penalty(dB) + total link loss(dB).

Power

Physical Characteristics

Environmental Limits

Regulatory Approvals

Warranty

5 years

Additional Information

⚠️ WARNING: HOT SURFACE!! Before touching it, special attention or protection is required.