Westermo RFI-211-T3G User manual

www.westermo.com
RedFox Industrial Series
Industrial Routing Switch
WeOS

26641-22310

3
6641-22310
General information
Legal information
The contents of this document are provided “as is”. Except as required by applicable law,
no warranties of any kind, either express or implied, including, but not limited to, the
implied warranties of merchantability and fitness for a particular purpose, are made in
relation to the accuracy and reliability or contents of this document. Westermo reserves
the right to revise this document or withdraw it at any time without prior notice.
Under no circumstances shall Westermo be responsible for any loss of data or income or
any special, incidental, and consequential or indirect damages howsoever caused.
More information about Westermo can be found at the following Internet address:
www.westermo.com
Software tools
Related software tools are available in the folder software tools under technical support
on the Westermo website.
License and copyright for included Free/Libre Open Source Software
This product includes software developed by third parties, including Free/Libre Open
Source Software (FLOSS). The specific license terms and copyright associated with the
software are included in each software package respectively. Please visit the product web
page for more information.
Upon request, the applicable source code will be provided. A nominal fee may be charged
to cover shipping and media. Please direct any source code request to your normal sales
or support channel.
WeOS Management Guide
This product runs WeOS (Westermo Operation System). Instructions for quick start,
configuration, factory reset and use of USB port are found in the WeOS Management
Guide at www.wetermo.com.

46641-22310 4
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Safety
Before installation:
Read this manual completely and gather all information on the unit. Make sure
that you understand it fully. Check that your application does not exceed the safe
operating specifications for this unit.
This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or similar, where access is
restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be
possible to disconnect manually from the power supply. Ensure compliance to
national installation regulations.
This unit uses convection cooling. To avoid obstructing the airflow around the unit,
follow the spacing recommendations (see Cooling section).
Before powering-up, a protective earthing conductor must be connected to the
protective earthing terminal and have a cross-sectional area of at least 1.5 mm².
Before mounting, using or removing this unit:
Prevent access to hazardous voltage by disconnecting the unit from power supply.
Warning! Do not open connected unit. Hazardous voltage may occur within this
unit when connected to power supply.
Class 1 Laser Product
Do not look directly into fibre optical fibre port or any connected fibre although
this unit is designed to meet the Class 1 Laser regulations.
Care recommendations
Follow the care recommendations below to maintain full operation of unit and to fulfil
the warranty obligations.
This unit must not be operating with removed covers or lids.
Do not attempt to disassemble the unit. There are no user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling above the specification may cause
damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not
waterproof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical
part may be damaged.
If the unit is not working properly, contact the place of purchase, nearest Westermo
distributor office or Westermo Tech support.
Fibre connectors are supplied with plugs to avoid contamination inside the optical port.
As soon as no optical fibre is mounted on the connector, e.g. for storage, service or
transportation, the plug should be applied.
Warning:
When this unit is operated at an ambient temperature above 60 °C, the External Surface
of Equipment may exceed Touch Temperature Limit according to UL/IEC/EN 60950-1.
To reduce the risk of fire, use on No. 26 AWG or larger telecommunication line cord.
!
!
!

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Note. Fibre Optic Handling
Fibre optic equipment needs special treatment. It is very sensitive to dust and dirt.
If the fibre will be disconnected from the unit the protective hood on the transmitter/
receiver must be connected. The protective hood must be kept on during transportation.
The fibre optic cable must also be handle the same way.
If these recommendations are not followed, the warranty might be jeopardized.
Cleaning of the optical connectors
In the event of contamination, the optical connectors should only be cleaned by the use
of recommended cleaning fluids and correct cleaning equipment.
Recommended cleaning fluids:
• Methyl-, ethyl-, isopropyl- or isobutyl-alcohol
• Hexane
• Naphtha
Maintenance
No maintenance is required, as long as the unit is used as intended within the specified
conditions.
Product disposal
This symbol means that the product shall not be treated
as unsorted municipal waste when disposing of it. It needs
to be handed over to an applicable collection point for
recycling electrical and electronic equipment.
By ensuring this product is disposed of correctly, you will
help to reduce hazardous substances and prevent potential
negative consequences to both environment and human
health, which could be caused by inappropriate disposal.

66641-22310
FCC Part 15.105
Notice:
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Agency approvals and standards compliance
Art.no Denomination Type Approval/compliance
3641-4000
3641-4110
3641-4200
3641-4210
3641-4300
3641-4305
3641-4310
3641-4315
3641-4320
RFI-219-T3G
RFI-211-T3G
RFI-215-F4G-T3G
RFI-207-F4G-T3G
RFI-219-F4G-T7G
RFI-119-F4G-T7G
RFI.-211-F4G-T7G
RFI-111-F4G-T7G
RFI-219-F4G-T7G-F8
EMC EN 50121-4, Railway applications – Electromagnetic
compatibility – Emission and immunity of the signalling and
telecommunications apparatus
EN 61000-6-1, Electromagnetic compatibility – Immunity
for residential environments
EN 61000-6-2, Electromagnetic compatibility – Immunity
for industrial environments
EN 61000-6-3, Electromagnetic compatibiliy – Emission
standards for residential, commercial and light-industrial
environments
EN 61000-6-4, Electromagnetic compatibility – Emission
for industrial environments
Safety UL/IEC/EN 60950-1, IT equipment
Marine DNV GL rules for classification – Ships and offshore units
DNV GL rules for classification
Type Temperature Humidity Vibration EMC Enclosure
RFI-series D B A B A/IP40
Corrosive
environment
Notice:
This product has been successfully tested in a corrosion test according to IEC 60068-
2-60, method 3. This means that the product meets the requirements to be placed in an
environment classified as ISA-S71.04 class G3.
Note! If the product is placed in a corrosive environment, it is important that all unused
connector sockets are protected with a suitable plug in order to avoid corrosion attacks
on the gold plated pins in connectors.
Simplified EU declaration of conformity
Hereby, Westermo declares that the equipment is in compliance with EU directives. The
full EU declaration of conformity and other detailed information are available at the
respective product page at www.westermo.com.

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M5 threaded hole
for PE connection
Safety control drawing
Position Direction /
description Input / Output values
1
2
3
4
1 IO / Status + Uin = 60 VDC max
2 IO / Status – Iin = 80 mA max
3 IO / Digital In + Uin = 60 VDC max
4 IO / Digital In – Iin = 2.9 mA max
Position Direction /
description Output values
1 Out / VBUS
Uout = 5 VDC max
Iout = 500 mA max
2 In/Out / D–
3 In/Out / D+
4 GND
Shield PE
Position Direction /
description Input values
1 In / +DC1
Uin = (16 – 60) VDC
Iin = 2.0 A @ 16 VDC
PIn = 31.5 W @ 16 VDC
2 In / +DC2
3 In / COM
4 In / COM
Position Direction /
description Input/output values
1 In/Vbus
U = 5V VDC max
I = 100 mA max
2 In/Out D-
3 In/Out D+
4 Not connected
5 GND
Degree of protection: IP 40
Ambient temperature: –40 °C to +70 °C
Installation spacing: Minimum 25 mm above/below
Minimum 10 mm left/right
Position Direction /
description Input/output values
1 In/Out / BI_DA+
Per port:
U = ± 1 V (4V/us)
I = ± 20 mA
Data rate:
10/100/1000 Mbit/s
2 In/Out / BI_DA–
3 In/Out / BI_DB+
4 In/Out / BI_DC+
5 In/Out / BI_DC–
6 In/Out / BI_DB–
7 In/Out / BI_DD+
8 In/Out / BI_DD–
Shield PE
Galvanically isolated via signal transformers and
capacitively isolated to GND/PE through a 2kV
1000pF capacitor.
See user manual for proven transient protection.

86641-22310
Safety control drawing
Position Direction* / description Input/output values
Rx In / Receive port Max 5 dBm
Tx Out / Transmit port
Position Direction* / description Input/output values
1 In/Out / BI_DA+
Per port:
U = ± 1 V (4V/us)
I = ± 20 mA
Data rate:
100/1000 Mbit/s
2 In/Out / BI_DA–
3 In/Out / BI_DB+
4 In/Out / BI_DC+
5 In/Out / BI_DC–
6 In/Out / BI_DB–
7 In/Out / BI_DD+
8 In/Out / BI_DD–
Shield PE
Galvanically isolated via signal transformers and capacitively
isolated to GND/PE through a 2kV 1000pF capacitor.
See user manual for proven transient protection.
* Direction relative this unit!
1
10/100 Base-TX
5
6
7
8
2
3
4
1000 Base-X1000 Base-T
1
5
6
7
8
2
3
4
Position Direction* / description Input/output values
1 In/Out / TD+
Per port:
U = ± 1 V (4V/us)
I = ± 20 mA
Data rate:
10/100 Mbit/s
2 In/Out / TD–
3 In/Out / RD+
4 Not connected
5Not connected
6 In/Out / RD–
7 Not connected
8 Not connected
Shield PE
Galvanically isolated via signal transformers and capacitively
isolated to GND/PE through a 2kV 1000pF capacitor.
See user manual for proven transient protection.
1000 Base-X1000 Base-T
1
5
6
7
8
2
3
4

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Type tests and environmental conditions
Phenomena Test Description Test levels
ESD EN 61000-4-2 Enclosure contact ± 6 kV
Enclosure air ± 8 kV
RF field AM modulated IEC 61000-4-3 Enclosure 20 V/m 80% AM (1 kHz), 80 – 2700 MHz
10 V/m 80% AM (1 kHz), 2700 – 6000 MHz
Fast transient EN 61000-4-4 Signal ports ± 2 kV
Power ports ± 2 kV
Surge EN 61000-4-5 Signal ports ± 2 kV line to earth, ± 1 kV line to line
Power ports ± 2 kV line to earth, ± 1 kV line to line
RF conducted EN 61000-4-6 Signal ports 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power ports 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power frequency
magnetic field
EN 61000-4-8 Enclosure 300 A/m 0, 16.7, 50, 60 Hz
Pulse magnetic field EN 61000-4-9 Enclosure 300 A/m
Radiated emission CISPR 16-2-3 Enclosure Class B
ANSI C63.4
(FCC part 15)
Enclosure Class B, 30 – 6500 MHz
Conducted emission CISPR 16-2-1 DC power ports
Telecommunication
ports
Class B
Dielectric strength EN 60950 Signal port to other
isolated ports
1.5 kVrms 50 Hz 1 min
Power port to other
isolated ports
1.5 kVrms 50 Hz 1 min
Temperature EN 60068-2-1
EN 60068-2-2
Operating –40 to +70ºC (all models)
Storage & Transport –40 to +85ºC (all models)
Maximum surface
temperature
135 °C (temperature class T4)
Humidity EN 60068-2-30 Operating 5 to 95% relative humidity
Storage & Transport 5 to 95% relative humidity
Altitude Operating 2 000 m / 70 kPa
Service life Operating 10 years
Vibration IEC 60068-2-6 Operating 7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
(Wall-mounted or DIN-rail mounted using TH
35-15 according to EN 60175)
Shock IEC 60068-2-27 Operating 15 g, 11 ms
(Wall-mounted or DIN-rail mounted using TH
35-15 according to EN 60175)
Enclosure UL 94 Aluminium / Zink Flammability class V-0 (all models)

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Description
The RedFox Industrial includes a collection of high performance industrial Ethernet
switches with enhanced routing functionality designed to build cost effective, secure and
reliable networks. The product range offers a number of Ethernet interface combinations,
which gives you the ability to select the perfect routing switch for your application
providing optimum functionality at the best value.
Advanced routing functions and firewall settings allow the RedFox to segregate networks
and ensure that mission critical industrial networks are protected. The RedFox is also
able to provide secure remote access to these networks across insecure connections by
acting as a VPN endpoint.
RedFox Industrial models
Westermo
article number
Denomination Description
3641-4100 RFI-219-T3G 3 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
16 x 10/100 Mbit/s, Ethernet TX, RJ-45
3641-4110 RFI-211-T3G 3 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
8 x 10/100 Mbit/s, Ethernet TX, RJ-45
3641-4200 RFI-215-F4G-T3G
3 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
8 x 10/100 Mbit/s, Ethernet TX, RJ-45
4 x 100/1000 Mbit/s, pluggable connections
tranceivers supported, Ethernet FX or TX SFP
3641-4210 RFI-207-F4G-T3G
3 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45.
4 x 100/1000 Mbit/s, pluggable connections
transceivers supported, Ethernet FX or TX SFP
3641-4300 RFI-219-F4G-T7G
7 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
4 x 100/1000 Mbit/s, pluggable connections
transceivers supported, Ethernet FX or TX SFP
8 x 10/100 Mbit/s, Ethernet TX, RJ-45
3641-4305 RFI-119-F4G-T7G
7 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
4 x 100/1000 Mbit/s, pluggable connections
transceivers supported, Ethernet FX or TX SFP
8 x 10/100 Mbit/s, Ethernet TX, RJ-45
3641-4310 RFI-211-F4G-T7G
7 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
4 x 100/1000 Mbit/s, pluggable connections
transceivers supported, Ethernet FX or TX SFP
3641-4315 RFI-111-F4G-T7G
7 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
4 x 100/1000 Mbit/s, pluggable connections
transceivers supported, Ethernet FX or TX SFP
3641-4320 RFI-219-F4G-T7G-F8
7 x 10/100/1000 Mbit/s, Ethernet TX, RJ-45
4 x 100/1000 Mbit/s, pluggable connections
transceivers supported, Ethernet FX or TX SFP
8 x 100 Mbit/s, pluggable connections transceivers
supported, Ethernet FX or TX SFP

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Housing
Description
Depending on RedFox model, the size of the enclosure may vary. There are two sizes
available, a two-slot housing and a three-slot housing.
Regardless of RedFox model, the slot on the far left will always be occupied by the
power and CPU interface. Other slots vary depending on RedFox model.
The back end holds a casted DIN-clip for stable mounting on a DIN-rail. Direct wall-
mount is also possible using the four brackets in each corner. The back end also holds
the earth connection. For detailed ground connection information see section on Earth
Connection.
2 and 3 slot enclosure
The slot on the left will always be occupied by the power and CPU. Other slots may vary
depending on RedFox model.
Specification
2 slot enclosure 3 slot enclosure
Dimension W x H x D 134 x 105 x 122 mm
(without connectors)
175 x 105 x 122 mm
(without connectors)
Weight 1.5 kg 2.2 kg
Number of slots 2 3
Degree of protection IP40 according to EN 60529 IP40 according to EN 60529
Cooling Convection Convection
Mounting Horizontal on 35 mm DIN-rail
or wall-mounted
Horizontal on 35 mm DIN-rail
or wall-mounted

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Power and CPU module
Description
Regardless of RedFox model, all units will be delivered with the power and CPU interface
in the slot on the far left. The power and CPU module holds a power board and a CPU
board. The isolated power supply has redundant power inputs and allows for a wide
operating voltage range (see interface specification). The digital IO-port can be used for
monitoring the unit (see Westermo OS management guide).
The CPU module holds several interfaces. Three RJ-45 connectors with support for
Ethernet 1000BaseTX, a USB port for easy save/load of system configuration and a
console port. The console connector is a micro USB cable that connects to a FTDI
FT232R USB to serial converter internally. For drivers please see www.ftdichip.com and
download the appropriate VCP driver.
For detailed information on LED indicators, see section on LED indicators Power/CPU.
Power and CPU
… Redundant power supply and alarm function
… Wide operating voltage range (16 VDC to 60 VDC)
… Digital IO for monitoring
… Console port for management using CLI
… USB port for easy save and load system configuration
… 3 x RJ-45 Ethernet 1000BaseTX connectors
… Status LED's

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Interface specifications
Power and CPU
Rated voltage 20 to 48 VDC
Operating voltage 16 to 60 VDC
Rated frequency DC
Polarity Reverse polarity protected
Redundant power input Ye s
Isolation to All other
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cable Not required

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Power
Rated voltage 20 to 48 VDC
Operating voltage 16 to 60 VDC
Rated current RFI-111-F4G-T7G 0.87 (1.06*) A @ 20 VDC
0.35 (0.43*) A @ 48 VDC
RFI-119-F4G-T7G 0.93 (1.12*) A @ 20 VDC
0.38 (0.45*) A @ 48 VDC
RFI-207-F4G-T3G 0.55 (0.72*) A @ 20 VDC
0.23 (0.29*) A @ 48 VDC
RFI-211-F4G-T7G 0.87 (1.06*) A @ 20 VDC
0.35 (0.43*) A @ 48 VDC
RFI-211-T3G 0.43 (0.60*) A @ 20 VDC
0.19 (0.25*) A @ 48 VDC
RFI-215-F4G-T3G 0.63 (0.82*) A @ 20 VDC
0.26 (0.33*) A @ 48 VDC
RFI-219-F4G-T7G 0.93 (1.12*) A @ 20 VDC
0.38 (0.45*) A @ 48 VDC
RFI-219-F4G-T7G-F8 1.30 (1.47*) A @ 20 VDC
0.52 (0.58*) A @ 48 VDC
RFI-219-T3G 0.63 (0.79*) A @ 20 VDC
0.26 (0.33*) A @ 48 VDC
Inrush current 40 mA2s @ 20 VDC
257 mA2s @ 60 VDC
Startup current** 2x Rated current
Rated frequency DC
Polarity Reverse polarity protected
Redundant power input Ye s
Isolation to All other
Connection Detachable
Connector size 0.2 - 2.5 mm2 (AWG 24 - 12)
Shielded cable Not required
* With 500mA USB load
** External supply current capability for proper start-up

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Connection to console port
The console port can be used to connect to the CLI
(Command Line Interface). The console connector is a
micro USB cable that connects to a FTDI FT232R USB
to serial converter internally. For drivers please see www.
ftdichip.com and download the appropriate VCP driver.
Console
Electrical specification USB 2.0 device interface
Data rate High speed 480mbit/s
Circuit type SE LV
Maximum supply current 100 mA
Isolation to All other except USB
Galvanic connection to USB
Connection USB Micro-B connector in device mode

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Ethernet TX
Electrical specification IEEE std 802.3. 2005 Edition
Data rate 10 Mbit/s, 100 Mbit/s, 1000 Mbit/s, manual or auto
Duplex Full or half, manual or auto
Circuit type TNV-1
Transmission range Up to 150 m with CAT5e cable or better*
Isolation to All other
Connection RJ-45 auto MDI/MDI-X
Shielded cable Not required, except when installed in Railway applications as
signalling and telecommunications apparatus and located close
to rails*
Conductive housing Ye s
Number of ports 3
* NOTE! Railway installation close to the rails.
To minimise the risk of interference, a shielded cable is recommended when the cable is located
inside 3 m boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this
port. This earthing point should have a low impedance connection to the conductive enclosure of
the apparatus cabinet, or similar, where the unit is built-in. This conductive enclosure should be
connected to the earthing system of an installation and may be directly connected to the protective
earth. Refer also to "Safety" section.
IO / Relay output
Connect resistance 30 W
Isolation to All other
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2 (AWG 24 – 12)
Maximum voltage/current 60 VDC / 80 mA
IO / Digital input
Voltage levels Vih > 8V Vil < 5V
Iin = 2.9mA @60V
Isolation to All other
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2 (AWG 24 – 12)
Maximum voltage 60 VDC
USB
Electrical specification USB 2.0 host interface
Data rate High speed 480mbit/s
Circuit type SELV
Maximum supply current 500 mA
Isolation to All other except Console
Connection USB receptacle connector type A
Conductive housing Ye s

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Position Direction Description
1 In/Out BI_DA+
2 In/Out BI_DA–
3 In/Out BI_DB+
4 In/Out BI_DC+
5 In/Out BI_DC–
6 In/Out BI_DB–
7 In/Out BI_DD+
8 In/Out BI_DD–
Shield In/Out Connected to PE
Position Direction* Description
1 Out VBUS
2 In/Out D–
3 In/Out D+
4 Out GND
Shield In/Out Connected to PE
Console
(see more information
on page 13) * Direction relative this unit.

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Power connection
I/O connection
1
2
3
4
4-position Product marking Direction Description
No. 1 +DC1 Input Supply voltage input DC1
No. 2 +DC2 Input Supply voltage input DC2
No. 3 -COM Input Common
No. 4 -COM Input Common
Lynx supports redundant power connection. The positive inputs are +DC1 and +DC2, the negative input for
both supplies are –COM. Connect the primary voltage (e.g. +24 VDC) to the +DC1 pin and return to one of the
–COM pins on the power input.
1
2
3
4
4-position Product marking Direction Description
No. 1 Status + Output Alarm relay (status) contact
No. 2 Status – Output Alarm relay (status) contact
No. 3 Digital In + Input Digital In +
No. 4 Digital In – Input Digital In –
The Status output is a potential free, opto-isolated normally closed solid-state relay.
This can be configured to monitor various alarm events within the Lynx unit, see WeOS Management Guide.
An external load in series with an external voltage source is required for proper functionality.
For voltage/current ratings, see Interface Specification section.
The Digital In is an opto-isolated
digital input which can be used
to monitor external events.
For voltage/current ratings, see
Interface Specification section:
Lynx
External
Load
Status
V
VDigital In
+
1
2
3
4
–

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LED indicators Power/CPU
LED Status Description
ON OFF Unit has no power.
GREEN All OK, no alarm condition.
RED Alarm condition, or until unit has
started up. (Alarm conditions are
configurable,
see ''WeOS Management Guide'').
BLINK Location indicator ("Here I am!").
Activated when connected to IPConfig
Tool,
or upon request from Web or CLI.
DC1 OFF Unit has no power.
GREEN Power OK on DC1.
RED +DC1 input voltage is below operating
voltage limit
DC2 OFF Unit has no power.
GREEN Power OK on DC2.
RED +DC2 input voltage is below operating
voltage limit
FRNT OFF FRNT disabled.
GREEN FRNT OK.
RED FRNT Error.
BLINK Unit configured as FRNT Focal Point.
RSTP OFF RSTP disabled.
GREEN RSTP enabled.
BLINK Unit elected as RSTP/STP root switch.
USR1 Configurable, see WeOS Management Guide
Copper ports 1-3 OFF No link.
GREEN Link established.
GREEN
FLASH
Data traffic indication.
YELLOW Port alarm and no link. Or if FRNT,
RSTP or Link Aggregation mode, port
is blocked.

20 6641-22310
Interface modules
8 copper ports
All ports support category 5e cable or better and can handle cable lengths up to 150 m
(492 ft).
Interface specifications
8 copper ports
Electrical specification IEEE std 802.3. 2005 Edition
Data rate 10 Mbit/s or 100 Mbit/s, manual or auto
Duplex Full or half, manual or auto
Circuit type TNV-1
Transmission range Up to 150 m with CAT5e cable or better*
Isolation to All other
Connection RJ-45 auto MDI/MDI-X
Shielded cable Not required, except when installed in Railway applications as
signalling and telecommunications apparatus and located close
to rails*
Conductive housing Ye s
Number of ports 8
* NOTE! Railway installation close to the rails.
To minimise the risk of interference, a shielded cable is recommended when the cable is located
inside 3 m boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this
port. This earthing point should have a low impedance connection to the conductive enclosure of
the apparatus cabinet, or similar, where the unit is built-in. This conductive enclosure should be
connected to the earthing system of an installation and may be directly connected to the protective
earth. Refer also to "Safety" section.