Westermo LRW-112 Series User manual

Fibre Optic industrial router
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
PKT
CH 2
LRW-100 Series
12
12
REV.A 6650-2270 2008.05 Mälartryck AB, Eskilstuna, Sweden
©Westermo Teleindustri AB
User Guide
6650-2270
LRW-112
SERIES

26650-2270
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

3
6650-2270
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.
!
!
!

46650-2260
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
Type Approval / Compliance
EMC EN 61000-6-2, Immunity industrial environments
EN 55024, Immunity IT equipment
EN 61000-6-3, Emission residential environments
FCC part 15 Class A
Safety EN 60950-1, IT equipment
FCC Part 15.105 Notice: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a partic-
ular installation. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
… Reorient or relocate the receiving antenna
… Increase the separation between the equipment and receiver
… Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected
… Consult the dealer or an experienced radio/TV technician for help.

5
6650-2260
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 Installation manual
LRW-102PP 3650-xxxx 6650-2260 Industrial Converter,
TP/FT-10 to fibre optic link LRW-102 3650-xxxx 6650-2260
LRW-112PP 3650-xxxx 6650-2270 Industrial Router,
TP/FT-10 to fibre optic link LRW-112 3650-xxxx 6650-2270
is in conformity with the following EC directive(s).
No Short name
89/336/EEG Electromagnetic Compatibility (EMC)
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 61000-6-2 Immunity for industrial environments 2 (2001)
EN 55024 Information technology equipment – Immunity 1 (1998)
EN 61000-6-3 Emission standard for residential, commercial and
light-industrial environments
1 (2001)
Herewith declares that product(s) listed above is in conformity with
No Title Issue
FCC part 15 Radio frequency devices 2003
Pierre Öberg
Technical Manager
28th April 2008

66650-2260
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 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 A
EN 55022 DC power ports Class B
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 Operating –40 to +70ºC LRW-112PP
–40 to +60ºC LRW-112
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 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

7
6650-2260
Description
The LRW-112 (LRW-112PP) router offers an easy way to extend the distance between
Lo n Wo r k s ® 78 kbit/s TP/FT network segments using a fibre optic link.
LRW-112 (LRW-112PP) is based on Echelon´s RTR-10 standard router core module, this
allowing standard configuration and installation with standard LON® tools. LRW-112
(LRW-112PP) can be installed as repeaters, configured routers, or learning routers.
The network segment using a high speed 1250 kbit/s backbone fibre optic network link.
This LRW-112 is a fibre optic modem used for point-to-point, (LRW-112PP), multi-drop
and redundant ring applications.
The LRW-112 (LRW-112PP) is designed for harsh out-door 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 net-
work 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 …
Lo n Wo r k s ® interface
2-positions detachable screw terminal …
Data rate 78 kbit/s …

86650-2260
Functional description
Router TP/FT interface – optical fibre
The LRW-112 (LRW-112PP) is a fibre optic router that converts between Lo n Wo r k s ®
TP/FT, and fibre optical link.
Router – optical fibre links
The LRW-112 routes LON packets between a TP/FT-10 channel and a fibre optic channel.
The communication channels consist of a fibre optic interface and a TP/FT-10 interface.
The fibre optic interface is equipped with either one (PP-version) or two sets of fibre
optic ports, each with its separate transmitter and receiver, and the TP/FT-10 channel
consists of one Lo n Wo r k s ® FTT-10A transceiver.
Single or multimode LC fibre connectors
The LRW-112 (LRW-112PP) 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.

9
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 (LRW-112PP) via fibre optic network
With only two network segments, the most cost effective solution is to use two point-
to-point LRW-112PP 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)

10 6650-2260
Normal operation
When LRW-112 unit receives data from the LON network, the LRW-112 (the initiator)
will transmit the data onto the fibre ring. During normal operation the data will be trans-
mitted onto ring A. Data received by the other LRW-112 units in the ring is transmitted
over to the corresponding LON network as well as forwarded in the fibre ring. When a
LRW-112 initiator receives its own data packet, the packet it stopped. A LRW-112 initia-
tor will not forward another packet while waiting for its own packet to return.
Redundant ring communications via fibre optic network
Under normal operation the Lo n Wo r k s ® data is sent over ring A. Should a fault be
detected on the fibre ring then the Lo n Wo r k s ® data will be carried on rings A and B.
The LRW-112 units could be linked together to form a fibre optic ring. With ring topol-
ogy, 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

11
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 10–20 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-112 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 10–20 ms. During that time the transferred data
frames should be seen as corrupted or missed.

12 6650-2260
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-112 is connected to two optical fibre links (mid unit) converted data will be trans-
mitted 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-112 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 auto-
matic 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, indi-
cated 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 indi-
cated 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-112 (LRW-112PP) should be supplied with safety extra low voltage (SELV). It is
designed to operate permanently over a wide input range and provided with two inde-
pendent inputs, allowing redundancy should either supply fail.
Single or multimode LC fibre connectors
The LRW-112 (LRW-112PP) 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.

13
6650-2260
Network installation
The LRW-112 is installed in the network as any standard LON router.
The FO-10 standard channel may be used when creating a channel object.
Note: LRW-112 and LRW-102 cannot be used in the same fibre optic network. It is pos-
sible to connect LRW-112 and LRW-102 via the LON interface.
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. …
LON Channel delay
On the fibre channel the devices are attached in a daisy-chain fashion. The signal path is
through each device, that is the packet passes through each device on its way. The signal
is regenerated each time it passes through a device, thus very long distances network
could be built.:
The time of propagation depends on the distance and the number of devices to
pass through. The propagation delay affects the channel communication parameters.
By default the LRW-112 has been programmed with communication parameters suitable
for a relative small to medium fibre network that follows the below equation:
Fibre distance (m) / 200 + Number of units < 72
For example the above equation would allow four LRW-112 units to use maximum fibre
optic cable length of 13.6 km (8.5 mi).
For larger networks the LRW-112 can be programmed with communication parameters
compensating for longer propagation delays. With parameters for large network the
following equation can be used.
Fibre distance (m) / 200 + Number of units < 576
For example, the above equation would allow eight LRW-112 units to use maximum fibre
optic cable length of 13.6 km (8.5 mi). Observe however that the maximum allowed fibre
length between two LRW-112 units is 20 km (12.4 mi) (using singlemode cable) depend-
ing on the performance of the fibre optic transmitter and receiver.
See page 15 for power budget tables.
It is recommended to use a LON® protocoll analyser to verify network perfomance dur-
ing high peak channel access.
The above discussion considers the limitation in maximum distace due to protocoll
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 15.

14 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 Yes
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 Lo n Wo r k s ® 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

15
6650-2260
Optical Power Budget
The maximum supported link lengths as specified in the table above should only been seen as indica-
tive. 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 con-
nectors, 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 differ-
ence 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.

16 6650-2260
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
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
Power
LED Indicators (for details see page 17)
LED Indicators placed under the lid
(for details see page 17)
LRW-112/ LRW-112PP
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.

17
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 Flaching Packets are passed between the router
sides
OFF –
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.
A_SRV
Placed under lid
ON Router side A (TP/FT-10) un-recoverable
error
Flashing Router side A (TP/FT-10) un-configured
OFF Router side A (TP/FT-10) configured
B_SRV
Placed under lid
ON Router side B (Fibre) un-recoverable
error
Flashing Router side B (Fibre) un-configured
OFF Router side B (Fibre) configured
PWR CH 1
TD FL L
RD FL R
PKT CH 2

18 6650-2260
Configuration
All needed configurations and parameter settings are done by the DIP-switches, located
under the top lid of the LRW-112 (LRW-112PP).
!
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
Not used
S2 DIP-switch
Factory settings
ON
1 2 3 4 5 6 7 8
Set status output at local
or remote error
ON
1 2 3 4 5 6 7 8
S1
ON
1 2 3 4 5 6 7 8
Set status interface
at local fibre link error
(Not used in pp version)
ON
1 2 3 4 5 6 7 8
Multidrop end unit
(use chanal 1 for end unit,
not used in pp version)
ON
1 2 3 4 5 6 7 8
Multidrop unit, mid unit
(Not used in pp version)
ON
1 2 3 4 5 6 7 8
S2
ON
1 2 3 4 5 6 7 8
Redundant ring
(Not used in pp version)
Service request button
LED "A"
LED "B"
Service request button
Pressing this button generates service request messages from each side of the router.
The service button is used for installation in network management tool.

19
6650-2260
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

20 6650-2260
Start up guide
Redundant ring application
Follow the steps below to get the unit up and running in a simple application:
Prepare the fibre optical network. …
Redundant ring. Set switch S2:3 to ON and all others to OFF, at all units. …
(If the status interface should be local, set S2:1 to ON)
Connect the fibre links between the units. …
Connect the power supply to all units. …
The Fibre links should be in operation, indicated by active CH 1 and CH 2 LED's. …
Connect the LON equipment to the LRW-112. …
The Redundant ring application is up and running. …
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