MOXA EtherDevice Switch
EDS-205 Hardware Installation Guide
1 Edition, May 2004
The MOXA EtherDevice™ Switches, EDS-205 series, are entry-level 5port Ethernet Switches that provide a cost-effective solution for your
industrial Ethernet connection.
For EDS-205, you could choose either DC power input from 12 to 48 V
or AC power input from 18 to 30V. These products can operation
from –10 to 60oC, and the rugged hardware design makes EDS-205
perfect for ensuring that your Ethernet equipment can meet demanding
industrial applications.
Throughout this Hardware Installation Guide, we use
EDS as an abbreviation for MOXA EtherDevice Switch:
EDS = MOXA EtherDevice Switch
Package Checklist
MOXA EDS-205 is shipped with the following items. If any of these
items is missing or damaged, please contact your customer service
representative for assistance.
1 EDS-205
Hardware Installation Guide
MOXA Product Warranty booklet
High Performance Network Switching Technology
10/100M, Full/Half-Duplex, MDI/MDIX auto-sensing
IEEE 802.3/802.3u/802.3x
Store and Forward switching process type, 1024 address entries
Industrial Design
Operating temperature ranges from -10 to 60 oC
Power inputs DC: 12 to 48 V, AC: 18 to 30 V 47~63 Hz
IP 30, plastic case
DIN-Rail mounting ability
Panel Layout of EDS-205 series
Heat dissipation orifices
Terminal block for power input
and grounding
Power input LED
10/100BaseT(X) Port
TP port’s 100 Mbps LED
TP port’s 10 Mbps LED
DIN-Rail kit
Mounting Dimensions
DIN-Rail Mounting
The plastic DIN-Rail attachment plate should already be fixed to the
rear panel of EDS when you take it out of the box. If you need to
reattach the DIN-Rail attachment plate to EDS, make sure the DIN-Rail
kit is situated towards the top, as shown in the figures below.
Insert the top of the DIN-Rail into The DIN-Rail attachment unit will
the slot.
snap into place as shown below.
To remove MOXA EDS-205 from
the DIN-Rail, insert a flat-blade
screw driver horizontally into the
DIN-Rail kit under the EDS-205,
and then pull it upwards and release
EDS towards you away from the
Wiring Requirements
Safety First!
Be sure to disconnect the power cord before installing
and/or wiring your MOXA EtherDevice Switch.
Calculate the maximum possible current in each power
wire and common wire. Observe all electrical codes
dictating the maximum current allowable for each wire
If the current goes above the maximum ratings, the
wiring could overheat, causing serious damage to your
You should also pay attention to the following points:
Use separate paths to route wiring for power and devices. If power
wiring and device wiring paths must cross, make sure the wires are
perpendicular at the intersection point.
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.
You can use the type of signal transmitted through a wire to
determine which wires should be kept separate. The rule of thumb is
that wiring that shares similar electrical characteristics can be
bundled together.
Keep input wiring and output wiring separated.
It is strongly advised that you label wiring to all devices in the system
when necessary.
Grounding MOXA EtherDevice Switch
Grounding and wire routing help limit the
effects of noise due to electromagnetic
interference (EMI). Run the ground
connection from the right most of 3-contact
terminal block 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 Power Inputs
The two left-most contacts of the 3-contact terminal block connector on
EDS’s top panel are used for EDS’s DC or AC inputs. Top and front
views of one of the terminal block connectors are shown here.
STEP 1: Insert the negative/positive DC
wires into the V-/V+ terminals.
STEP 2: To keep the 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.
STEP 3: Insert the plastic terminal block
connector prongs into the terminal block
receptor, which is located on EDS’s top
Communication Connections
EDS-205 has five 10/100BaseT(X) Ethernet ports.
10/100BaseT(X) Ethernet Port Connection
The 10/100BaseT(X) ports located on EDS’s front panel are used to
connect to Ethernet-enabled devices.
Below we show pinouts for both MDI (NIC-type) ports and MDI-X
(HUB/Switch-type) ports, and also show cable wiring diagrams for
straight-through and cross-over Ethernet cables.
RJ45 (8-pin, MDI) Port Pinouts
RJ45 (8-pin, MDI-X) Port Pinouts
RJ45 (8-pin) to RJ45 (8-pin) Straight-Through Cable Wiring
RJ45 (8-pin) to RJ45 (8-pin) Cross-Over Cable Wiring
LED Indicators
The front panel of MOXA EtherDevice Switch contains several LED
indicators. The function of each LED is described in the table below.
Power is being supplied to
power input
Power is not being supplied to
power input
TP port’s 10 Mbps link is active
Data is being transmitted at 10
TP Port’s 10 Mbps link is
TP port’s 100 Mbps link is active
Data is being transmitted at 100
100BaseTX Port’s link is inactive
Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function allows users to connect MOXA
EtherDevice Switch’s 10/100BaseTX ports to any kind of Ethernet
device, without paying attention to the type of Ethernet cable being
used for the connection. This means that you can use either a
straight-through cable or cross-over cable to connect EDS to Ethernet
Dual Speed Functionality and
MOXA EtherDevice Switch’s 10/100 Mbps switched RJ45 port auto
negotiates with the connected device for the fastest data transmission
rate supported by both devices. All models of MOXA EtherDevice
Switch are plug-and-play devices, so that software configuration is not
required at installation, or during maintenance. The half/full duplex
mode for the switched RJ45 ports is user dependent and changes (by
auto-negotiation) to full or half duplex, depending on which transmission
speed is supported by the attached device.
Switching, Filtering, and Forwarding
Each time a packet arrives at one of the switched ports, a decision is
made to either filter or forward the packet. Packets with source and
destination addresses belonging to the same port segment will be
filtered, constraining those packets to one port, and relieving the rest of
the network from the need to process them. A packet with destination
address on another port segment will be forwarded to the appropriate
port, and will not be sent to the other ports where it is not needed.
Packets that are used in maintaining the operation of the network (such
as the occasional multi-cast packet) are forwarded to all ports.
MOXA EtherDevice Switch operates in the store-and-forward switching
mode, which eliminates bad packets and enables peak performance to
be achieved when there is heavy traffic on the network.
Switching and Address Learning
MOXA EtherDevice Switch has an address table that can hold up to 1K
node addresses, which makes it suitable for use with large networks.
The address tables are self-learning, so that as nodes are added or
removed, or moved from one segment to another, MOXA EtherDevice
Switch automatically keeps up with new node locations. An
address-aging algorithm causes the least-used addresses to be deleted
in favor of newer, more frequently used addresses. To reset the
address buffer, power down the unit and then power it back up.
Auto-Negotiation and Speed Sensing
All of MOXA EtherDevice Switch’s RJ45 Ethernet ports independently
support auto-negotiation for speeds in the 10BaseT and 100BaseTX
modes, with operation according to the IEEE 802.3u standard. This
means that some nodes could be operating at 10 Mbps, while at the
same time, other nodes are operating at 100 Mbps.
Auto-negotiation takes place when an RJ45 cable connection is made,
and then each time a LINK is enabled. MOXA EtherDevice Switch
advertises its capability for using either 10 Mbps or 100 Mbps
transmission speeds, with the device at the other end of the cable
expected to similarly advertise. Depending on what type of device is
connected, this will result in agreement to operate at a speed of either
10 Mbps or 100 Mbps.
If a MOXA EtherDevice Switch RJ45 Ethernet port is connected to a
non-negotiating device, it will default to 10 Mbps speed and half-duplex
mode, as required by the IEEE 802.3u standard.
Processing Type
Address Table Size
RJ45 Ports
LED Indicators
Input Voltage
Input Current
Overload Current
Reverse Polarity
Operating Temperature
Storage Temperature
Ambient Relative
IEEE802.3, 802.3u, 802.3x
Store and Forward, with IEEE802.3x full
duplex, non-blocking flow control
1K uni-cast addresses
10/100BaseT(X) auto negotiation speed, F/H
duplex mode, and auto MDI/MDI-X
Power, 10/100 M
DC: 12 to 48 V, AC: 18 to 30 V, 47 ~63 Hz
12 to 48 VDC, 5 W
18 to 30 VAC, 5 VA, 47 ~63 Hz
Removable 3-contact Terminal Block
1.1 A
IP30 protection, plastic case
25 x 109 x 88 mm (W x H x D)
135 g
-10 to 60°C (14 to 140°F)
-40 to 70°C (-40 to 158°F)
5 to 95% (non-condensing)
Regulatory Approvals
Free Fall
UL 508 (Pending)
FCC Part 15, CISPR (EN55022) class A
EN61000-4-2 (ESD),
EN61000-4-3 (RS),
EN61000-4-4 (EFT),
EN61000-4-5 (Surge),
EN61000-4-6 (CS),
IEC 60068-2-27
IEC 60068-2-32
IEC 60068-2-6
5 years
MOXA Internet Services
Customer satisfaction is our number one concern, and to ensure that
customers receive the full benefit of our products, Moxa Internet
Services has been set up to provide technical support, driver updates,
product information, and user’s manual updates.
The following services are provided
E-mail for technical support
World Wide Web (WWW) Site for product information: