Westermo ODW-621 User manual

Industrial Converter
Serial RS-232 to fibre optic link
Point-to-point applications
www.westermo.com
©Westermo Teleindustri AB
User Guide
6650-2223
ODW-621
Fibre Optic Modem

26650-2223
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:
http://www.westermo.com

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6650-2223
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 mounting, using or removing this unit:
Prevent access to hazardous voltages by disconnecting the unit from the power
supply.
Warning! Do not open a connected unit. Hazardous voltages may occur within
this unit when connected to a power supply.
Class 1 Laser Product
This unit is designed to meet the Class 1 Laser regulations. However, the user is
warned not to look directly into fibre optical port or any connected fibre.
Care recommendations
Follow the care recommendations below to maintain full operation of the unit and to
fulfil the warranty obligations.
This unit must not be operated with covers or lids removed.
Do not attempt to disassemble the unit.There are no user serviceable parts inside.
Do not drop, knock or shake the unit. Rough handling beyond 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 parts 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.
The plug should be fitted when no optical fibre is inserted in the connector, e.g. during
storage, service or transportation.
!
!
!

46650-2223
Note. Fibre Optic Handling
Fibre optic equipment requires careful handling as the fibre components are very
sensitive to dust and dirt. If the fibre is disconnected from the modem, the protective
plug on the transmitter/receiver must be replaced.The protective plug must be kept on
during transportation.The fibre optic cable must also be protected in the same way.
If this recommendation is not followed, it can jeopardise the warranty.
Cleaning of the optical connectors
In the event of contamination, the optical connectors should be cleaned by using forced
nitrogen and some kind of cleaning stick.
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.
Agency approvals and standards compliance
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 interfer-
ence 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.
EN 55022 Notice: This is a class A product. In a domestic environment this product may cause radio inter-
ference in which case the user may be required to take adequate measures.
Type Approval / Compliance
EMC EN 61000-6-1, Immunity residential environments
EN 61000-6-2, Immunity industrial environments
EN 61000-6-3, Emission residential environments
EN 61000-6-4, Emission industrial environments
EN 55022, Emission IT equipment, class A
EN 55024, Immunity IT equipment
FCC part 15 Class A
EN 50121-4, Railway signalling and telecommunications apparatus
IEC 62236-4, Railway signalling and telecommunications apparatus
Safety EN 60950-1, IT equipment

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6650-2223
Declaration of Conformity
Westermo Teleindustri AB
Declaration of conformity
Or
g
.nr/
Postadress/Postal address Tel. Telefax Postgiro Bankgiro Corp. identity number Registered office
S-640 40 Stora Sundby 016-428000 016-428001 52 72 79-4 5671-5550 556361-2604 Eskilstuna
Sweden Int+46 16428000 Int+46 16428001
The manufacturer
Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product Model Art no
Industrial fiberoptic repeaters/media
converters
ODW-600 Series 3650-0xxx
is in conformity with the following EC directive(s).
No Short name
2004/108/EC Electromagnetic Compatibility (EMC)
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 50121-4 Railway applications – Electromagnetic compatibility
– Emission and immunity of the signalling and
telecommunications apparatus
2006
EN 55022 Information technology equipment - Emission 2006 +A1:2007
EN 55024 Information technology equipment - Immunity 1998 +A1:2001
+A2:2003
EN 61000-6-1 Electromagnetic compatibility – Immunity for
residential environments
2007
EN 61000-6-2 Electromagnetic compatibility – Immunity for
industrial environments
2005
EN 61000-6-3 Electromagnetic compatibility – Emission for
residential environments
2007
EN 61000-6-4 Electromagnetic compatibility – Emission for
industrial environments
2007
The last two digits of the year in which the CE marking was affixed: 09
Pierre Öberg
Technical Manager
29th September 2009

66650-2223
Type tests and environmental conditions
Electromagnetic Compatibility
Phenomena Test Description Level
ESD EN 61000-4-2 Enclosure contact ± 6 kV
Enclosure air ± 8 kV
RF field AM modulated IEC 61000-4-3 Enclosure 10 V/m 80% AM (1 kHz), 80 – 800 MHz
20 V/m 80% AM (1 kHz), 800 – 1000 MHz
20 V/m 80% AM (1 kHz), 1400 – 2700 MHz
RF field 900 MHz ENV 50204 Enclosure 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
Fast transient EN 61000-4-4 Signal ports ± 2 kV
Power ports ± 2 kV
Surge EN 61000-4-5 Signal ports unbalanced ± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced ± 2 kV line to earth, ± 1 kV line to line
Power ports ± 2 kV line to earth, ± 2 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
Pulse Magnetic field EN 61000-4-9 Enclosure 300 A/m, 6.4 / 16 μs pulse
Voltage dips
and interruption
EN 61000-4-11 AC power ports 10 & 5 000 ms, interruption
200 ms, 40% residual voltage
500 ms, 70% residual voltage
Mains freq. 50 Hz EN 61000-4-16 Signal ports 100 V 50 Hz line to earth
Mains freq. 50 Hz SS 436 15 03 Signal ports 250 V 50 Hz line to line
Radiated emission EN 55022 Enclosure Class B
FCC part 15 Class A
Conducted emission EN 55022 AC power ports Class B
FCC part 15 AC power ports Class B
EN 55022 DC power ports Class A
Dielectric strength EN 60950 Signal port to all other
isolated ports
2 kVrms 50 Hz 1min
Power port to other
isolated ports
3 kVrms 50 Hz 1min
2 kVrms 50 Hz 1min (@ rated power < 60V)
Environmental
Temperature Operating –40 to +70°C
Storage & Transport –40 to +70°C
Humidity Operating 5 to 95% relative humidity
Storage & Transport 5 to 95% relative humidity
Altitude Operating 2 000 m / 70 kPa
Service life Operating 10 year
Vibration IEC 60068-2-6 Operating 7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
Shock IEC 60068-2-27 Operating 15 g, 11 ms
Packaging
Enclosure UL 94 PC / ABS Flammability class V-1
Dimension W x H x D 35 x 121 x 119 mm
Weight 0.26 kg
Degree of protection IP 21
Cooling IEC 529 Enclosure Convection
Mounting Horizontal on 35 mm DIN-rail

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Description
This ODW-621 is a fibre optic modem used for point-to-point applications. It acts as a
converter between a serial port and a fibre optical link. The maximum distance of the
fibre link depends on selected transceiver and fibre type. Distance up to 80 km (50 miles)
is available.
The ODW-621 is designed for harsh out-door usage, in industrial, road or railway
installations.
Data will be sent transparently over the fibre optical link via the serial interface RS-232.
Converter serial interface – optical fibre.…
Point-to-point communication via fibre optical network.…
Serial interface, asynchronous mode.…
LC-2 Multimode LC connectors, 5 km (3.1 miles).…
LC-15 Singlemode LC connectors, 15 km (9.3 miles).…
LC-40 Singlemode LC connectors, 40 km (24.9 miles).…
LC-80 Singlemode LC connectors, 80 km (50 miles).…
Bi-di Multimode LC connectors, 5 km (3.1 miles).…
Bi-di Singlemode LC connectors, 20 km (12.5 miles).…
Bi-di Singlemode LC connectors, 40 km (24.9 miles).…
Bi-di Singlemode LC connectors, 60 km (37.3 miles).…
Designed for harsh environments.…
Redundant DC or AC power supply, 2 kVAC galvanic isolated to other ports.…
Status interface for fault indication.…
Small Form Factor Pluggable (SFP) transceivers.…
9-position D-sub connector…
RS-232 interface…
Data rate up to 250 kbit/s…
RTS/CTS or CTS always active.…

86650-2223
STATUS
C
NO
NC
LED’s
Switches
CH 1
SFP
Fibre transceive
r
TX
RX
Internal
Electronics
RS -232
SHIELD
DCD
RD
TD
SG
DSR
RTS
CTS
ODW-621
COM
COM
+VA
O
V
P
+VB
POWER
O
V
P
Functional description
OVP Over Voltage Protection
OCP Over Current Protection
Converter serial interface – optical fibre
ODW-621 is a fibre optic modem that converts between electrical RS-232 and a fibre
optic link.
ODW-621 can also be used to convert from RS-232 to RS-485 by using one ODW-621
and one ODW-631.
Data rate up to 250 kbit/s
ODW-621 converts data using rates from 300 bit/s up to 250 kbit/s.

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6650-2223
Point-to-point communication via fibre optical network
The serial data is transferred via a fibre optic network between two ODW-621.
This application is useful e.g. for long distance communication, where electromagnetic
interference may occur or when isolation of the electrical network is needed.The maxi-
mum optical fibre distance between two units depends on selected fibre transceiver and
fibre type. Distance up to 80 km (50 miles) are available.
Note! The Bi-di transceivers must always be used in pair, see example:
TX 1310 nm RX 1310 nm
RX 1550 nm TX 1550 nm
POWER CH 1
COM +VA +VB COM
POWER CH 1
COM +VA +VB COMTX RX TX RX
Fibre optical connection
at point-to-point communication
POWER CH 1
COM +VA +VB COM
POWER CH 1
COM +VA +VB COM
TX/
RX
TX/
RX
Fibre optical connection
at point-to-point communication (Bi-di transceiver)
Bi-di transceiver,TX 1310 nm,
RX 1550 nm.
Bi-di transceiver,TX 1550 nm,
RX 1310 nm.

10 6650-2223
Optical fibre link functionality and status indication
At power on, all LED’s will be active during an initiation sequence followed by an auto-
matic initiation of the optical fibre link.The alarm will be set until the fibre optic link is in
operation and ready to transfer serial data. Data can be transferred over the fibre optic
link as long as the link is in operation.
When the fibre optic link is out of operation this will be indicated by a local alarm out-
put.When the link returns to operation, the alarm will reset automatically.
RS-232 interface
A 9-position female D-sub connector that handles full duplex data rates up to 250 kbit/s.
With RS-232 mode the RS-232 interface can handle an arbitrary data rate up to
250 kbit/s without any data rate or data bit settings.
With RTS/CTS control selected, the request to send (RTS) signals will be transferred
between the ODW-621s over the fibre optic network.These RTS signals are transferred
independently of the data transfer.An RTS signal received at one ODW-621 will set the
clear to send (CTS) signal at the other converter.
The data carrier detect (DCD) signal is set as long as the fibre link is in operation, ready
to transfer data.The data set ready (DSR) signal is set as long as the ODW-621 is in
service. If RTS/CTS is set to OFF will CTS always be set to active.
Redundant power supply, galvanic isolated (2 kVAC) to other ports
The ODW-621 should be supplied with safety extra low voltage (SELV). It is designed to
operate permanently over a wide DC or AC voltage input range and provided with two
independent inputs for enhanced redundancy if either supply fails.
Single- or multimode LC fibre connectors
The ODW-621 uses Small Form Factor Pluggable (SFP) transceivers that are in compli-
ance with Multi-Sourcing Agreement (MSA). A wide range of different fibre transceivers
and connectors can be used.
Status interface
This port enables supervision of fibre optic link status by a relay with both normally open
and closed contacts.
The status will be set if:
• Local or remote of fibre link errors exist.
• The unit is out of service, e.g. no power supply.
Designed for harsh environments, such as industrial, road and railway
applications.
The ODW-621 complies with standards for industrial environments, railway signalling and
telecommunications apparatus.Additionally the wide temperature range permits it to be
installed in out-door cabinets without any additional measures, such as heating, etc.

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6650-2223
Designed for harsh environments, such as industrial, road and railway
applications
The ODW-621 complies with standards for industrial environments, railway signalling and
telecommunications apparatus.Additionally the wide temperature range permits it to be
installed in out-door cabinets without any additional measures, such as heating, etc.
System delay in an optical network
Serial data transferred from one ODW-621 via an optical network to a second one, will
be delayed due to the length of optical fibre and the signal processing within the units.
The signal processing delay is dependent on the data rate and conversions, and the fibre
delay is dependent on the total length of the optical fibre.
Item Functions Delay
1 Fibre:
Optical fibre length delay (typical)
5 μs/km
2 Converter electrical to fibre:
Signal processing
0.6 μs (CTS mode)
1 tBit + 0.6 μs
(CTS/RTS mode)
3 Converter fibre to electrical:
Signal processing
0.6 μs
Note t
bit = 1 / Baud rate (Baud rate in bit/s)
The system delay when transferring data from the serial input at one ODW-621 to the
serial output of other one is calculated by adding the following:
1. Fibre: The optical fibre length delay.
2. Converter electrical to fibre: Signal processing delay.
3. Converter fibre to electrical: Signal processing delay.
Example 1: Data data transfer from one ODW-621 to a second
converter with a total fibre length of 25 km. Data rate of 9 600 bit/s.
1. Fibre: The total optical fibre length delay 25 * 5 μs = 125 μs.
2. Converter electrical to fibre: Signal processing delay 1 tbit + 0.6 μs = 105 μs + 1.0 μs
= 106 μs.
3. Converter fibre to electrical: Signal processing delay = 0.6 μs.
4. The system delay is calculated by adding the delays in items 1 to 3 above = 232 μs
Example 2: Data transfer from one ODW-621 to a second converter
with a total fibre length of 25 km. Data rate of 9 600 bit/s.
5. Fibre: The total optical fibre length delay 25 * 5 μs = 125 μs.
6. Converter electrical to fibre: Signal processing delay = 0.6 μs.
7. Converter fibre to electrical: Signal processing delay = 0.6 μs.
8. The system delay is calculated by adding the delays in item 1 to 3 above = 126 μs

12 6650-2223
Status
Port type Signal relay, changeover contacts
Rated voltage Up to 48 VDC
Operating voltage Up to 60 VDC
Contact rating 500 mA @ 48 VDC
Contact resistance < 50 mΩ
Isolation to RS-232 and Power port
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2(AWG 24 – 12)
Shielded cable Not required
* External supply current capability for proper startup
Interface specifications
Power
Rated voltage 12 to 48 VDC
24 VAC
Operating voltage 10 to 60 VDC
20 to 30 VAC
Rated current 300 mA @ 12 V
150 mA @ 24 V
75 mA @ 48 V
Rated frequency DC: –
AC: 48 to 62 Hz
Inrush current I2t 0.2 A2s
Startup current* 1.0 Apeak
Polarity Reverse polarity protected
Redundant power input Yes
Isolation to RS-232 and Status port
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2(AWG 24 – 12)
Shielded cable Not required
* 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.
RS-232
Electrical specification EIA RS-232
Data rate 300 bit/s – 250 kbit/s
Transmission range 15 m
Isolation to Status and Power port
Connection 9-pin D-sub female (DCE)
Shielded cable Not required, except when installed in railway applications as
signalling and telecommunications apparatus and located close
to rails*
Conductive housing Isolated to all other circuits and housings

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FX (Fibre) SM-LC80 SM-LC40 SM-LC15 MM-LC2
Fibre connector LC duplex LC duplex LC duplex LC duplex
Fibre type Singlemode
9/125 μm
Singlemode
9/125 μm
Singlemode
9/125 μm
Multimode,
62.5/125 and
50/125 μm
Wavelength nm 1550 1310 1310 1310
Transmitter
Output optical power min/max
–5/0 dBm** –5/0 dBm** –15/–8 dBm** –20/–14 dBm*
Receiver
Input sensitivity, max
–34 dBm –34 dBm –31 dBm –31 dBm
Receiver
Input optical power, max
–5 dBm*** –3 dBm*** –8 dBm –8 dBm
Optical power budget,
worst-case
29 dB 29 dB 16 dB 11 dB
Transceiver type Small Form Factor Pluggable (SFP)
Multi-Sourcing Agreement (MSA) compliant
Laser class Class 1, IEC 825-1 Accessible Emission Limit (AEL)
Optical Power Budget
The allowed link length is calculated from the optical power budget (OPB), the available optical
power for a fibre-optic link, and the attenuation of the fibre, comprising losses due to in-line
connectors, splices, optical switches and a margin for link ageing (typical 1.5 dB for 1300 nm).
The worst-case optical power budget (OPB) in dB for a fibre-optic link is determined by the differ-
ence between the transmitter’s output optical power (min) and the receiver input sensitivity (max).
FX (Fibre) Bi-di
LC-60
Bi-di
LC-40
Bi-di
LC-20
Bi-di
MM LC-2
Fibre connector LC Simplex LC Simplex LC Simplex LC Simplex
Fibre type Singlemode
9/125 μm
Singlemode
9/125 μm
Singlemode
9/125 μm
Multimode
62.5/125 and
50/125 μm
Wavelength nm, connector 1
Wavelength nm, connector 2
Tx 1310, rx
1550 Tx 1550,
rx 1310
Tx 1310, rx
1550 Tx 1550,
rx 1310
Tx1310, rx
1550 TX
1550, rx 1310
Tx 1310, rx
1550 Tx 1550,
rx 1310
Transmitter
Output optical power min/max
–5/0 dBm ** –8/0 dBm ** -10/0 dBm ** –10/–8 dBm *
Receiver
Input sensitivity, max
–34 dBm –34 dBm –28 dBm –28 dBm
Receiver
Input optical power, max
0 dBm*** 0 dBm*** 0 dBm –0 dBm
Optical power budget,
worst-case
29 dB 26 dB 18 dB 18 dB
Transceiver type Small Form Factor Pluggable (SFP)
Multi-Sourcing Agreement (MSA) compliant
Laser class Class 1, IEC 825-1 Accessible Emission Limit (AEL)
* Output power is power coupled into a 62.5/125 μm multimode fibre
** Output power is power coupled into a 9/125 μm singlemode fibre
*** The optical power should be reduced by at least 5 dB (SM-LC80 and Bi-di LC-60) or 3dB (SM-LC-40
and Bi-di LC-40) between the optical output and input.

14 6650-2223
Location of Interface ports, LED’s and DIP-switches
ODW-621
Position Direction* Description
D-sub
1 Out Data Carrier Detect (DCD)
2 Out Received Data (RD)
3 In Transmitted Data (TD)
4 Not connected
5 – Signal Ground (SG)
6 Out Data Set Ready (DSR)
7 In Request To Send (RTS)
8 Out Clear To Send (CTS)
9 Not connected
Position Direction* Description Product
marking
1 In Common
voltage
COM
2 In Voltage A +VA
3 In Voltage B +VB
4 In Common
voltage
COM
Position Direction Description Product
marking
1 NO Contact with C
when fibre opti-
cal links are in
operation
NO
2 C Common C
3 NC Open (no con-
tact with C)
when fibre opti-
cal links are in
operation
NC
LED Indicators
(for details
see page 16)
DIP-switches accessible under lid
(for details see page 15)
FX(Fibre)
(for details
see page 13)
Status
screw terminal
Power
screw terminal
RS-232
D-sub
* Direction relative this unit

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LED indicators
LED Status Description
PWR
Power
ON In service (power)
Flashing Fault condition
OFF Out of service
RDR OFF Not used
CH 2 OFF Not used
CH 1 ON Fibre link at port CH 1 in operation.
Data can be transmitted
OFF Fibre link at port CH 1 out of operation
TD
Serial data Receive
Flashing Receive data on the serial port. Data will
be transmitted to the fibre link
OFF –
RD
Fibre link data Receive
Flashing Receive data on the fibre link.This frame
is transmitted to the serial port
OFF –
FL R (Red)
Failure Link Remote
ON Remote fibre link failure.A fibre link is
out of operation at any other unit of the
optical network
OFF All fibre links are in operation at all
other units in the fibre optical network
FL L (Red)
Failure Link Local
ON Local fibre link failure.This unit has
identified a fibre link failure
OFF Fibre link of this unit is in operation

16 6650-2223
Configuration
All needed configurations and parameter settings are done by the DIP-switches, located
under the top lid of the ODW-600.
!
DIP-switch settings
Before DIP-switch settings:
Prevent damage to internal electronics from electrostatic discharges (ESD) by
discharging your body to a grounding point (e.g. use of wrist strap)
Note: Disconnect power before DIP-switch settings.
S2S1
S1 DIP-switch
ON
1 2 3 4 5 6 7 8
CTS always active
ON
1 2 3 4 5 6 7 8
RTS signal will be transferred to
remote modem.When the remote
modem receives RTS. CTS will be
set to high.
Factory settings
ON
1 2 3 4 5 6 7 8
S1
ON
1 2 3 4 5 6 7 8
S2
S2 DIP-switch
ON
1 2 3 4 5 6 7 8
Set status port of local fibre link
error*
* SW 2:6 ON: The status relay only change status in the unit that is connected to the receive side.

17
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Cooling
This unit uses convection cooling.To avoid obstructing the air-
flow around the unit, use the following spacing rules. Minimum
spacing 25 mm (1.0 inch) above /below and 10 mm (0.4 inches)
left /right the unit. Spacing is recommended for the use of unit
in full operating temperature range and service life.
Removal
Press down the black support at the top of the unit. See figure.
Mounting
This unit should be mounted on 35 mm DIN-rail, which is
horizontally mounted inside an apparatus cabinet, or similar.
Snap on mounting, see figure.
CLICK!
10 mm *
(0.4 inches)
25 mm
25 mm
* Spacing (left/right) recommended for
full operating temperature range

18 6650-2223
Configure the ODW-621s. Using the factory DIP-switch settings, set:…
S1: CTS always active or RTS/CTS control.…
Connect The fibre link between the ODW-621s.…
Connect the power supply to both ODW-621s.…
After a few seconds the fibre link should be in operation, indicated by an active…
CH1 LED.
Connect the serial cables from PLC master and slave to respective ODW-621s.…
Frames from PLC master that are correctly received the ODW-621 should be…
indicated by flashing TD LED.
Frames that are received via the fibre link will be transmitted to the PLC slave…
and indicated by flashing RD LED.
Replies from slave to master will be transferred and indicated in the opposite way.…
The point-to-point application is up and running.…
POWER CH 1
COM +VA +VB COM
POWER CH 1
COM +VA +VB COMTX RX TX RX
Start up guide, point-to-point application
Follow the steps below to get the unit up and running in a simple application.
Master Slave

REV.C 6650-2223 2009-09 Westermo Teleindustri AB, Sweden
Westermo Teleindustri AB • SE-640 40 Stora Sundby, Sweden
Phone [phone] Fax [phone]
E-mail: [e-mail]
Westermo Web site: www.westermo.com
Westermo Teleindustri AB have distributors in several countries, contact us for further information.
Westermo Data Communications AB
Svalgången 1
SE-724 81 Västerås
Phone: [phone] • Fax: [phone]
[e-mail]
Westermo Data Communications Ltd
Talisman Business Centre • Duncan Road
Park Gate, Southampton • SO31 7GA
Phone: [phone] • Fax.:[phone]
E-Mail: [e-mail]
Westermo Data Communications GmbH
Goethestraße 67, 68753 Waghäusel
Tel.: [phone] • Fax.:[phone]
E-Mail: [e-mail]
Westermo Data Communications S.A.R.L.
9 Chemin de Chilly 91160 CHAMPLAN
Tél : [phone] • Fax : [phone]
E-mail : [e-mail]
Westermo Data Communications Pte Ltd
2 Soon Wing Road #08-05
Soon Wing Industrial Building
Singapore 347893
Phone [phone] • Fax [phone]
E-Mail: [e-mail]
Subsidiaries