Westermo LRW-702-F2 User manual

LRW-702-F2
Fibre Optic industrial converter/repeater
for LonWorks® TP/FT-10 point-to-point,
line and redundant ring
www.westermo.com

26650-2260

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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 www.westermo.com.

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Safety and Regulations
Warning signs are provided to prevent personal injury and/or damages to the product.
The following levels are used:
Level of warning Description Consequence
personal injury
Consequence
material damage
WARNING
Indicates a potentially
hazardous situation
Possible death or
major injury
Major damage to the
product
CAUTION
Indicates a potentially
hazardous situation
Minor or moderate
injury
Moderate damage to
the product
NOTICE
Provides information
in order to avoid
misuse of the
product, confusion or
misunderstanding
No personal injury Minor damage to the
product
NOTE
Used for highlighting
general, but important
information
No personal injury Minor damage to the
product

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Before Installation
Read this manual completely and gather all information on the product. Make sure that
you understand it fully. Check that your application does not exceed the safe operating
specifications for this product.
SAFETY DURING INSTALLATION
The product must be installed by qualified service personnel
and built in to an apparatus cabinet or similar, where access is
restricted to service personnel only.
During installation, ensure a protective earthing conductor is
first connected to the protective earthing terminal (only valid for
metallic housings). Westermo recommends a cross-sectional area
of at least 4 mm2.
Upon removal of the product, ensure that the protective earthing
conductor is disconnected last.
HAZARDOUS VOLTAGE
Do not open an energized product. Hazardous voltage may occur
when connected to a power supply.
PROTECTIVE FUSE
The power supply wiring must be sufficiently fused.
It must be possible to disconnect manually from the power supply.
Ensure compliance to national installation regulations.
This product has no internal fuse and should be connected via an
external fuse for protection.

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CLASS 1 LASER PRODUCT
Do not look directly info a fibre optical port or any connected
fibre, although the product is designed to meed the Class 1 Laser
regulations and complies with 21 CFR 1040.10 and 1040.11.
FIBRE OPTIC HANDLING
Fibre optic equipment need special treatment. It is very sensitive
to dust and dirt. If the fibre is disconnected from the product, the
protective plugs on the transmitter/receiver must be connected.
The protective plugs must be kept on during transportation. The
fibre optics cables must be handled the same way.
ELECTROSTATIC DISCHARGE (ESD)
Prevent electrostatic discharge damages to internal electronic
parts by discharging your body to a grounding point (e.g. use a
wrist strap).

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Care Recommendations
Follow the care recommendations below to maintain full operation of product and to
fulfill the warranty obligations:
• Do not drop, knock or shake the product. Rough handling above the specification
may cause damage to internal circuit boards.
• Use a dry or slightly water-damp cloth to clean the product. Do not use harsh
chemicals, cleaning solvents or strong detergents.
• Do not paint the product. Paint can clog the product and prevent proper operation.
If the product is used in a manner not according to specification, the protection provided
by the equipment may be impaired.
If the product is not working properly, contact the place of purchase, nearest Westermo
distributor office or Westermo technical support.
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.
Cleaning of the Optical Connectors
In the event of contamination, the optical connectors should be cleaned by the use of
forced nitrogen and some kind of cleaning stick.
Recommended cleaning fluids:
• Methyl-, ethyl-, isopropyl- or isobutyl-alcohol
• Hexane
• Naphtha

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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.
Type Approval / Compliance
EMC EN 61000-6-2, Immunity industrial environments
EN 61000-6-4, Emission industrial environments
Agency Approvals and Standards Compliance
Declaration of Conformity
Hereby, Westermo declares that this product is in compliance with applicable EU
directives and UK legislations. The full declaration of conformity and other detailed
information is available at www.westermo.com/support/product-support.

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Type Tests and Environmental Conditions
Electromagnetic Compatibility
Phenomena Test Description Level
ESD EN 61000-4-2 Enclosure contact ± 4 kV
Enclosure air ± 8 kV
RF field AM modulated IEC 61000-4-3 Enclosure 10 V/m 80% AM (1 kHz)
Fast transient EN 61000-4-4 Signal ports ± 1 kV
Power ports ± 2 kV
Surge Signal ports balanced ± 1 kV line to earth, ± 1 kV line to line
Power ports ± 0.5 kV line to earth, ± 0.5 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 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
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
10 & 500 ms, 30% reduction
100 & 1 000 ms, 60% reduction
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
Voltage dips
and interruption
EN 61000-4-29 DC power ports 10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
Radiated emission CISPR 16-2-3
ANSI C63.4
(FCC part 15)
Enclosure Class B
Class A
Conducted emission CISPR 16-2-1
ANSI C63.4
(FCC part 15b)
AC power ports Class B
AC power ports Class B
DC power ports Class A
Dielectric strength EN 60950 Signal port to all other
isolated ports
1.5 kVrms 50 Hz 1min
Power port to other
isolated ports
2 kVrms 50 Hz 1min
Environmental
Temperature EN 60068-2-1
EN 60068-2-2
Operating –40 to +60ºC LRW-702-F2
Storage & Transport –40 to +70°C
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
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 IEC 529 Enclosure IP 21
Cooling Convection
Mounting Horizontal on 35 mm DIN-rail

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Functional Description
Converter TP/FT Interface – Optical Fibre
The LRW-702-F2 is a fibre optic converter that converts between LONWORKS®TP/FT,
and fibre optical link.
Repeater – Optical Fibre Links
The LRW-702-F2 is a fibre optic repeater that repeats received data from one fibre
link out to the other link. This is useful e.g. for long distance communication, where
electromagnetic interference may occur or when isolation of the electrical network is
needed.
Singlemode or Multimode LC Fibre Connectors
The LRW-702-F2 uses Small Form Factor Pluggable (SFP) transceivers that are in
compliance with Multi-Sourcing Agreement (MSA). A wide range of different fibre
transceivers and connectors can be used.

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Interface Specifications
Power
Rated voltage 12 to 48 VDC
24 VAC
Operating voltage 10 to 60 VDC
20 to 30 VAC
Rated current 400 mA @ 12 VDC
200 mA @ 24 VDC
100 mA @ 48 VDC
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 Ye s
Isolation to TP/FT-10 port and status port
Connection 4-position detachable screw terminal
Connector size 0.2 – 2.5 mm2(AWG 24 – 12)
Shielded cable Not required
* External supply current capability for proper startup.
Status
Port type Solid state relay
Operating voltage Up to 60 VDC
Load current Up to 100 mA
Contact resistance 8 Ω
Isolation to TP/FT-10 port and power port
Connection 2-position detachable screw terminal
Connector size 0.2 – 2.5 mm2(AWG 24 – 12)
TP/FT-10
Electrical specification LONWORKS®TP/FT-10 using FTT-10A transceiver
Data rate 78.5 kbit/s
Data format Synchronous
Protocol LonTalk®
Transmission range Up to 2700 m
Termination Single or double external termination according to TP/FT-10
specification
Isolation to Power port and status port
Connection 2-positon detachable screw terminal
Connector size 0.2 – 2.5 mm2(AWG 24 – 12)
Shielded cable Not required
Conductive housing No

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PWR CH 1
TD FL L
RD FL R
PKT CH 2
CH 1
COM +VA +VB COM
TX RX
LON STATUS
N2 N1 L2 L1
LRW-702
CH 2
TX RX
12
2
1
Location of Interface Ports, LEDs and DIP-switches
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
* Direction relative this unit
Power
LED Indicators)
Position Direction* Description Product
marking
1 In/Out TP/FT-10
connection
N1
2 In/Out TP/FT-10
connection
N2
TP/FT-10
Position Direction* Description Product
marking
1 In/Out Contact with
position 2 when
fibre optical links
are in operation
1
2 In/Out Common 2
Status
FX (Fibre)
Ch 1 and Ch 2..

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LED Indicators
LED Status Description
PWR
Power
ON Power is on.
OFF Power is off.
FP ON Focal point
OFF Redundant ring member or multidrop
unit.
CH 2
Channel 2 link status
ON Fiber link to other unit has been
established at CH 2.
Flashing Optical power detected but link to other
unit has not been established at CH 2.
OFF No optical power detected and no link
to other unit has been established at
CH 2.
CH 1
Channel 1 link status
ON Fiber link to other unit has been
established at CH 1.
Flashing Optical power detected but link to other
unit has not been established at CH 1.
OFF No optical power detected and no link
to other unit has been established at
CH 1.
TD Flash Data received on the TP/FT-10 interface
and transmitted out on the optical
interface.
OFF No data received on the TP/FT-10
interface.
RD Flash Data received on the optical interface
and transmitted out on the TP/FT-10
interface.
OFF No data received on the optical interface.
FL R
Failure link remote
ON Remote fibre link failure.
A fibre link is out of operation at any
other unit than this one.
Flashing Hardware error or invalid configuration.
FL L
Failure link local
ON Local fibre link failure.
A fibre link is out of operation at this
unit.
Flashing Hardware error or invalid configuration.
Note: During power up, all LED’s will turn on for about 1 second.

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ON
1 2 3 4 5 6 7 8
Configuration
All needed configurations and parameter settings are done by the DIP-switches, located
under the top lid of the LRW-702-F2.
S2S1
S1 DIP-switch
Not used
S2 DIP-switch
Factory settings
Set status port on local fibre
link (FL L) error only.
S1
Set status port on both local
fibre link (FL L) and remote
fibre link (FLR) errors.
Multidrop mid unit or
redundant ring member.
Point to point or multidrop end
unit, e.g. the first
or lastuhit in a multidrop network.
S2
Redundant ring focal point. Only
one focal point allowed in a ring.
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ELECTROSTATIC DISCHARGE (ESD)
Prevent electrostatic discharge damages to internal electronic
parts by discharging your body to a grounding point (e.g. use a
wrist strap).
BEFORE EDITING THE DIP-SWITCH SETTINGS
Disconnect the power before editing the DIP-switch settings.

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Prepare the Fibre Optical Network
• Both units must be configured for point to point application by setting DIP-switch S2:2
to the ON position.
• Set DIP-switch and S2:1 as desired. See page with “Status port” for more information.
• Verify that DIP-switch S2:3 is in the OFF position.
• Connect the fibre pairs between the units. Always connect CH 1 as shown in the
picture above.
• Connect the power supply to all units and verify that all fibre links become active. (CH
1 on both units are on, FL L off).
• Connect the LON devices to the corresponding LRW-702-F2 unit.
• The network is now up and running.
Point-to-Point Configuration
PROCESSING DELAYS
In an LRW-70-F2 fibre optic network there will be some additional
processing delays that do not exist in an electrical bus. It is
possible that the application must be adjusted to accommodate
these delays if using many LRW-702-F2 units in a large network.
See page with “Calculating system delay” for more information on
how to determine the overall system delay time.

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Multidrop Configuration
Prepare the Fibre Optical Network
• The first and last LRW-702-F2 units must be configured as Multidrop end units by
settting DIP-switch S2:2 to the ON position. (End units only have one fibre pair each and
must know that this is a fact)
• Set DIP-switch and S2:1 as desired. See page with “Status port” for more information.
• Verify that DIP-switch S2:3 is in the OFF position.
• Connect the fibre pairs between the units. Always connect CH 1 from one unit to CH
2 on the next unit as shown in the picture above.
• Connect the power supply to all units and verify that all fibre links become active. (CH
1 and CH 2 LEDs are on, FL L and FL R LEDs are off).
• Connect the LON devices to the corresponding LRW-702-F2 unit.
• The network is now up and running.
PROCESSING DELAYS
In an LRW-70-F2 fibre optic network there will be some additional
processing delays that do not exist in an electrical bus. It is
possible that the application must be adjusted to accommodate
these delays if using many LRW-702-F2 units in a large network.
See page with “Calculating system delay” for more information on
how to determine the overall system delay time.

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Behavior During Optical Link Failure
If an optical fibre segment fails, all communication with units beyond the faulty fibre
segment will be lost. To determine which fibre segment has failed, look at the FL L, CH 1
and CH 2 LEDs as show in the picture above.

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Redundant Ring Configuration
Prepare the Fibre Optical Network
• One, and only one, of the LRW-702-F2 units must be configured as a ring focal point
by setting DIP-switch S2:3 to the ON position. (The ring focal point acts as a logical end
point in the optical fibre ring, thus forming a bus type of structure)
• Connect the fibre pairs between the units. Always connect CH 1 from one unit to CH
2 on the next unit as shown in the picture above.
• Connect the power supply to all units and verify that all fibre links become active. (CH
1 and CH 2 LEDs are on, FL L and FL R LEDs are off).
• Connect the LON devices to the corresponding LRW-702-F2 unit.
• The network is now up and running.
Note: In an LRW-702-F2 fibre optic network there will be some additional processing
delays that do not exist in an electrical bus. It is possible that the application must
be adjusted to accommodate these delays if using many LRW-702-F2 units in a large
network.
See page with “Calculating system delay” for more information on how to determine the
overall system delay time.

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Behavior During Optical Link Failure
If an optical fibre segment fails, the LRW-702-F2 unit configured as focal point will
reconfigure the system so that data is sent and received over the otherwise redundant
fibre pair.
To determine which fibre segment has failed, look at the FL L, CH 1 and CH 2 LEDs as
show in the picture above.
IN CASE OF FIBRE LINK FAILURE
If a fibre link fails, there will be some time before the system
reconfigures itself during witch data may be corrupted or lost.
See “Reconfiguration time under faulty condition” for more
information on how to determine the system reconfiguration
time.

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Calculating System Delay
Data exchange between LONWORKS devices via a LRW-702-F2 fibre optic link will be
delayed due to the length of the optical fibre and the signal processing within the LRW-
702-F2 units. The following equation can be used to calculate the overall system delay:
Maximum delay (µs) = Total fibre distance (m) / 200 + Number of LRW-702-F2 units
For example, in a multidrop system comprising four LRW-702-F2 units connected
together using three 1,5 km fibre links, the end to end delay will be: 3 x 1500 / 200 + 4
= 26,5 µs
Reconfiguration Time under Faulty Condition
The reconfiguration time is determined by the time it takes to detect a faulty fibre
segment plus the time it takes to transport an error status message through to the
LRW-702-F2 focal point unit. The time to transport an error status message to the focal
point unit is dependent on how many units the error status message has to be repeated
through and the total fibre length delay. The following equation can be used to calculate
the reconfiguration time:
Reconfiguration time (µs) = Total fibre distance (m) / 200 + Number of LRW-702-F2
units + 3µs