Westermo LRW-702-F2 User manual

Fibre Optic industrial
converter/repeater
for LonWorks® TP/FT-10
point-to-point,
line and redundant ring
www.westermo.com
LON STATUS
N2 N1 L2 L1
PWR CH 1
TD
FL L
RD FL R
FP
CH 2
LRW-700 Series
12
12
©Westermo Teleindustri AB
User Guide
6651-2271
LRW-702-F2

26650-2260
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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6650-2260
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 oper-
ating 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 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 water-
proof. 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 dis-
tributor office or Westermo Tech support.
Fibre connectors are supplied with plugs to avoid contamination inside the optical port.
As long as no optical fibre is mounted on the connector, e.g. for storage, service or
transportation, should the plug be applied.
!
!
!

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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 modem 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 this recommendation not will be followed it can jeopardise the warranty.
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
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
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

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Declaration of Conformity
Westermo Teleindustri AB
Declaration of Conformity
Org.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 Converter/Router LRW-702-F2 3651-1401
is in conformity with the following EU directive(s).
No Short name
2014/30/EU Electromagnetic Compatibility (EMC)
2011/65/EU Restriction of the use of certain hazardous substances in electrical and electronic
equipment (RoHS)
References of standards applied for this EU declaration of conformity.
No Title Issue
EN 61000-6-2 Electromagnetic compatibility – Immunity for industrial
environments
2005
EN 61000-6-4 Electromagnetic compatibility – Emission for industrial
environments
2007
+A1:2011
EN 50581 Technical documentation for the assessment of electrical and
electronic products with respect to the restriction of hazardous
substances
2012
Pierre Öberg
Technical Manager
13
t
h
April 2018

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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.
Single 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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6651-2271
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-100 Series
CH 2
TX RX
12
2
1
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-100 Series
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
Power
LED Indicators)
LRW-702-F2
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 posi-
tion 2 when fibre
optical links are in
operation
1
2 In/Out Common 2
Status
* Direction relative this unit
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.
!
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
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.
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

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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.
Note: 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 ith “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.
Note: 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

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About the interfaces
Power
The power terminal has two independent inputs, +VA and +VB, allowing redundant
power input. The LRW-702-F2 power supply is galvanically isolated from all other
interfaces.
Optical fibre interfaces
LRW-702-F2 uses Small Form Factor Pluggable (SFP) transceivers. This means that a wide
range of different fibre transceivers and connectors can be used.
LONWORKS TP/FT-10 interface
Connection terminal to a LONWORKS TP/FT-10 transceiver. TP/FT-10 is a twisted
pair communications at 78 kbps with distances to 2700 meters in a doubly terminated
bus topology. The TP/FT-10 also supports free-topology wiring to 500 meters which
eliminates the need to install an exact multi-drop arrangement. Star, home run, multi-
drop, and loop wiring, or any combination, are supported by the TP/FT-10.
Status port
The status port connects to an internal solid state relay witch may be used to trigger an
external alarm if a fault condition occurs. During normal operation pins 1 and 2 are in
contact with each other. During an optical link failure, or power failure, pins 1 and 2 are
isolated from each other.
Optical link failures can be classified in to two categories, local or remote, as indicated
by the FL L and FL R LEDs. A local link failure is when an optical link is down at this
particular unit. A remote link failure is when an optical link is down at some other unit.
From the factory, the status port is set to trigger on both types of link failures. However,
by setting DIP-switch S1:1 to the ON position, the status port will only trigger when a
local link failure has occurred.

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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!
CLICK!
10 mm *
(0.4 inches)
25 mm
25 mm
* Spacing (left/right) recommended for
full operating temperature range

REV. A 6651-2271 2018-04 Westermo Teleindustri AB, Sweden
Westermo • SE-640 40 Stora Sundby, Sweden
Tel [phone] Fax [phone]
E-mail: [e-mail]
www.westermo.com