Westermo LRW-102 Series User manual

www.westermo.com
LRW-102 Series
Fibre Optic industrial converter/repeater
for LonWorks® TP/FT-10 point-to-point,
line and redundant ring
LON STATUS
N2 N1 L2 L1
PWR CH 1
TD
FL L
RD FL R
PKT
CH 2
LRW-100 Series
12
12

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 the following Internet address:
www.westermo.com

46650-2260
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.
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 recy-
cling 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.

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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 61000-6-1, Immunity residential environments
EN 61000-6-2, Immunity industrial environments
EN 61000-6-3, Emission residential environments
EN 61000-6-4, Emission industrial environments
Safety EN 60950-1, IT equipment
Simplified EU declaration of conformity
Hereby, Westermo declares that the equipment is in compliance with applicable 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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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), 80 – 1 000 MHz
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 +70ºC LRW-102PP
–40 to +60ºC LRW-102
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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Description
The LRW-102 (LRW-102PP) offers an easy way to extend the distance between
LonWorks® 78 kbit/s TP/FT network segments using a fibre optic link.
The LRW-102PP is a fibre optic modem used for point-to-point applications and the
LRW-102 is used for multidrop and redundant ring applications. It acts as a repeater
between the two fibre optic links, and as a converter between fibre optical links and
the LON TP/FT port. The maximum distance of the fibre links depends on selected
transceiver and fibre types.
The LRW-102 (LRW-102PP) is designed for harsh outdoor usage, in industrial, road or
railway installations. The complete transparent conversion to and from the fibre optic
media facilitates the installation procedure by eliminating the need for any additional
network addressing or software configuration.
Convert LON TP/FT-10 interface – optical fibre
…Multidrop, point-to-point alternatively redundant ring communication
via fibre optical network
…Small Form Factor Pluggable (SFP) transceivers
…LC fibre connectors, single or multimode
…LC-2 Multimode LC connectors, 5 km (3.1 miles)
…LC-15 Singlemode LC connectors, 15 km (9.3 miles)
…Bi-di, Multimode LC connectors, 5 km (3.1 miles)
…Bi-di, Singlemode LC connectors, 20 km (12.4 miles)
…Redundant power supply, 2 kVAC galvanic isolated to other ports
…Designed for harsh environments
…Re-timing
…Status port
LonWorks® interface
…2-positions detachable screw terminal
…Data rate 78 kbit/s

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Functional description
Converter TP/FT interface – optical fibre
The LRW-102 (LRW-102PP) is a fibre optic converter that converts between
LonWorks® TP/FT, and fibre optical link.
Repeater – optical fibre links
The LRW-102 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-102 (LRW-102PP) 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.

10 6650-2260
Note: Bi-di fibre can be used.
The bi-di transceivers must always be used in pair, see example:
Point-to-point communication via fibre optic network
With only two network segments, the most cost effective solution is to use two point-
to-point LRW-102PP units to create a single fibre optic connection.
The point-to-point connection provides a totally transparent fibre link which means that
all data received on one units TP/FT port will be forwarded unchanged to the other port,
as illustrated in the figure.
1550 nm
1310 nm
TX
RX
RX
TX
Bi-di transceiver, TX 1310 nm, RX 1550 nm
Bi-di transceiver, TX 1550 nm, RX 1310 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)

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Normal operation
When LRW-102 unit receives data from the LON network, the LRW-102 (the initiator)
will transmit the data onto the fibre ring. During normal operation the data will be
transmitted onto ring A. Data received by the other LRW-102 units in the ring is
transmitted over to the corresponding LON network as well as forwarded in the fibre
ring. When a LRW-102 initiator receives its own data packet, the packet it stopped. A
LRW-102 initiator will not forward another packet while waiting for its own packet to
return.
Redundant ring communications via fibre optic network
Under normal operation the LonWorks® data is sent over ring A. Should a fault be
detected on the fibre ring then the LonWorks® data will be carried on rings A and B.
The LRW-102 units could be linked together to form a fibre optic ring. With ring
topology, a built-in redundancy scheme offers communication fault tolerance.
Ring A
Ring B
TX RX TX RX TX RX TX RX TX RX TX RX TX RX TX RX
CH 2 CH 1 CH 2 CH 1 CH 2 CH 1 CH 2 CH 1
LON
Network
LON
Network
LON
Network
LON
Network

12 6650-2260
Behaviour under faulty condition
Elapsed time from any kind of failure at the fibre optic network until data exchange after
a corrective action depends on total length of fibre ring. This is typically 40–500 ms.
During that time, the transferred data frames should be seen as corrupted or missed.
Failure Indications
Fibre interruption ring A, TX On: FL R
Fibre interruption ring A, RX On: FL L
Fibre interruption ring A, RX & TX On FL L
Fibre interruption ring B, TX On: FL R
Fibre interruption ring B, RX On: FL L
Fibre interruption ring B, RX & TX On: FL L
Fibre interruption ring A and B
(e.g. CH1 or CH2 both TX & RX)
On: FL L &/
or FL R
* Regarding functionality see chapter “multi drop application”
Recovery from faulty status
LRW-102 will automatically recover to the previous operating status when a failure
disappears. This involves recovery from bus/multi drop network to Redundant ring A/B
when ring is up and running and recovery from Ring B to Redundant ring A when the
ring is up and running. The time to recover from the failure status depends on total
length of fibre ring. This is typically 40–500 ms. During that time the transferred data
frames should be seen as corrupted or missed.

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Bus or multidrop communications via fibre optic network
TX RX TX RX TX RX TX RX TX RX TX RX TX RX TX RX
CH 2 CH 1 CH 2 CH 1 CH 2 CH 1 CH 2 CH 1
LON
Network
LON
Network
LON
Network
LON
Network
The data is transferred via the fibre optic network to the serial ports of all units. If
LRW-102 is connected to two optical fibre links (mid unit) converted data will be
transmitted in both directions, via both CH 1 and CH 2. With only one optical fibre
link (end unit) converted data will be transmitted in one direction, via CH 1 only. Data
received from one LRW-102 optical fibre port will be repeated through the other optical
fibre port and it will also convert the frame to serial data.
Optical fibre link functionality and status indication
At power on, all LED's will be active during an initiation sequence followed by an
automatic initiation of the optical fibre links. The alarm will be set until the fibre optical
links are in operation and ready to transfer serial data.
Data can be transferred over a fibre optical link as long as the link is in operation,
indicated by active CH1 respective CH2.
When any of the fibre optical links is out of operation and this is a faulty state, will it be
indicated by a local alarm and set the alarm output. It will also send a remote alarm via
the other link, if possible. When the link returns to operations mode, the alarm will reset
automatically.
Redundant power supply, galvanic isolated (2 kVAC) to other ports.
LRW-102 (LRW-102PP) should be supplied with safety extra low voltage (SELV). It
is designed to operate permanently over a wide input range and provided with two
independent inputs, allowing redundancy should either supply fail.
Single or multimode LC fibre connectors
The LRW-102 (LRW-102PP) 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.
Note: Bi-Di fibre can be used.

14 6650-2260
LON Channel delay
The LON TP/FT-10 (EIA-709.3) specification states a maximum delay of 36 µs and
a maximum of one repeater between any two nodes. Using the LRW-102 this delay
restriction will normally be met if the total fibre cable length is restricted to 5.6 km 3.5
mile).
When two or more LRW-102 is used on a LON® free topology network they form a
physical repeater link. As with a normal FTT-FTT physical repeater, the LRW-102 link
also forms a new channel segment and regenerates the signal allowing more nodes to be
installed.
It is important that the user is aware of the limitations involved with a physical extension
of an FTT channel. The LRW-102 units can transparently forward LonTalk® packet and
also assure that the required signal level is kept throughout the channel extension.
However, cable length between the units will impose an extra propagation delay on the
channel that could conflict with the media access timing used by the LonTalk® protocol.
Increasing the propagation delay results in a higher probability for packet collisions,
especially for a busy channel.
A normal FTT channel is dimensioned for one physical repeater allowing a maximum
distance of 5400 metres (2 x 2700 metres) or 3.4 mi (2 x 1.7 mi).
For a busy channel it is recommended to use the LRW-112 router instead for the LRW-
102 converter. With the LRW-112 router, the delay is not a problem since it uses a
dedicated fibre optic channel where the propagation delay is accounted for.
It is recommended to use a LON® protocol analyser to verify network performance
during high peak channel access. If an increased number of packets collisions and retries
are found we recommend using the LRW-112 router instead.
According to the EIA-709.3, the delay through a repeater link must not exceed 36 µs. To
honour that requirement the following relation should be used:
Fibre distance (m) / 200 + Number of units < 36
Recommended max number of units = 10
For example, the above relation would allow two LRW-102 units to use a maximum fibre
optic cable length of 6.2 km (3.8 mi).
Status interface
This interface enables supervision of fibre optic link state.<8 ohm means that status is OK.
The fault state will be set if:
…Local or remote fibre link errors exist.
…The unit is out of service, e.g. no power supply.

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The EIA-709.3 recommendation is strict and shall handle 100% load on a network,
decreasing the load gives possibility to increase the allowed delay in the network.
Westermo has made tests with 60% load on the TP/FT-10 network and up to 60% load it
is possible to increase the allowed delay to 127 µs.
The following relation can be used on networks with up to 60% load
Fibre distance (m) / 200 + Number of units < 127
Recommended max number of units = 10
For example, the above equation would allow 10 LRW-102 units to use a maximum fibre
optic cable length of 23.4 km (15 miles).
The above discussion considers the limitation in maximum distance due to protocol
parameters involving media access and network idle detection. As with all fibre optic
products, the maximum distance is also dependent on the over all power budget (see
page 17).

16 6650-2260
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
Galvanic connection to –
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 start up.
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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Optical Power Budget
The maximum supported link lengths as specified in the table above should only been seen as
indicative. 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 aging (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
difference between the minimum transmitter output optical power and the lowest receiver
sensitivity.
FX (Fibre) SM-LC15 MM-LC2
Fibre connector LC duplex LC duplex
Fibre type Singlemode
9/125 mm
Multimode,
62.5/125 and 50/125 mm
Wavelength nm 1310 1310
Transmitter
Output optical power min/max
–15/–8 dBm** –20/–14 dBm*
Receiver
Input sensitivity, max
–31 dBm –31 dBm
Receiver
Input optical power, max
–8 dBm –8 dBm
Optical power budget,
worst-case
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)
FX (Fibre) Bi-di
LC-20
Bi-di
MM LC-2
Fibre connector LC Simplex LC Simplex
Fibre type Singlemode
9/125 µm
Multimode
62.5/125 and 50/125 µm
Wavelength nm, connector 1
Wavelength nm, connector 2
Tx1310, rx 1550 TX 1550,
rx 1310
Tx 1310, rx 1550 Tx 1550,
rx 1310
Transmitter
Output optical power min/max
-10/0 dBm ** –10/–8 dBm *
Receiver
Input sensitivity, max
–28 dBm –28 dBm
Receiver
Input optical power, max
0 dBm –0 dBm
Optical power budget,
worst-case
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 mm multimode fibre
** Output power is power coupled into a 9/125 mm 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.

18 6650-2260
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, LED’s 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(for details see page 17)
LRW-102/ LRW-102PP
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.
(Ch 2 on
LRW-102 only)
For fibre details
see page 15.

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6650-2260
* Direction relative this unit
LED indicators
LED Status Description
PWR
Power
ON In service (power)
Flashing Fault condition
OFF Out of service
PKT Not
used
–
Not
used
–
CH 2 ON Fibre link at port CH 2 in operation.
Data can be transmitted.
(Not used in pp version)
OFF Fibre link at port CH 2 out of operation.
(Not used in pp version)
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 Flashing Receive accepted data on the serial port.
Data will be transmitted to the fibre link.
OFF –
RD Flashing Receive data on the fibre link that is
transmitted to the serial port.
OFF –
FL R (Red) 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) ON Local fibre link failure. This unit has
identified a fibre link failure.
OFF Fibre link of this unit is in operation.
PWR CH 1
TD FL L
RD FL R
PKT CH 2

20 6650-2260
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-102 (LRW-102PP).
!
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 output at local
or remote error
S1
Set status interface
at local fibre link error
(Not used in pp version)
Multidrop end unit
(use chanal 1 for end unit,
not used in pp version)
Multidrop unit, mid unit
(Not used in pp version)
S2
Redundant ring
(Not used in pp version)
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