Westermo LRW-702-F2 User Manual
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LRW-702-F2
Fibre Optic industrial converter/repeater
for LonWorks ® TP/FT-10 point-to-point,
line and redundant ring

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Summary of Contents for Westermo LRW-702-F2

  • Page 1 LRW-702-F2 Fibre Optic industrial converter/repeater for LonWorks ® TP/FT-10 point-to-point, line and redundant ring...
  • Page 2 6650-2260...
  • Page 3: General Information

    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.
  • Page 4: Safety And Regulations

    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 Consequence personal injury material damage Indicates a potentially Possible death or Major damage to the hazardous situation major injury product...
  • Page 5: Before Installation

    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.
  • Page 6: Class 1 Laser Product

    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.
  • Page 7: Care Recommendations

    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.
  • Page 8: Declaration Of Conformity

    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. Agency Approvals and Standards Compliance Type Approval / Compliance...
  • Page 9: Type Tests And Environmental Conditions

    Power port to other 2 kVrms 50 Hz 1min isolated ports Environmental Temperature EN 60068-2-1 Operating –40 to +60ºC LRW-702-F2 EN 60068-2-2 Storage & Transport –40 to +70°C Humidity EN 60068-2-30 Operating 5 to 95% relative humidity Storage & Transport...
  • Page 10: Functional Description

    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.
  • Page 11: Interface Specifications

    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 AC: 48 to 62 Hz Inrush current I 0.2 A...
  • Page 12 Location of Interface Ports, LEDs and DIP-switches LED Indicators) Status Position Direction* Description Product marking In/Out Contact with position 2 when fibre optical links are in operation In/Out Common TP/FT-10 Position Direction* Description Product marking FX (Fibre) In/Out TP/FT-10 Ch 1 and Ch 2.. connection In/Out TP/FT-10...
  • Page 13 LED Indicators Status Description Power is on. Power Power is off. Focal point Redundant ring member or multidrop unit. CH 2 Fiber link to other unit has been established at CH 2. Channel 2 link status Flashing Optical power detected but link to other unit has not been established at CH 2.
  • Page 14 Configuration All needed configurations and parameter settings are done by the DIP-switches, located under the top lid of the LRW-702-F2. 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).
  • Page 15: Point-To-Point Configuration

    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.
  • Page 16: Multidrop Configuration

    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) •...
  • Page 17 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. 6651-2271...
  • Page 18 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) •...
  • Page 19 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.
  • Page 20 702-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...
  • Page 21 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.
  • Page 22 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. 10 mm * Cooling (0.4 inches) 25 mm This unit uses convection cooling. To avoid obstructing the air- flow around the unit, use the following spacing rules.
  • Page 23 6651-2271...
  • Page 24 Westermo • Metallverksgatan 6, SE-721 30 Västerås, Sweden Tel +46 16 42 80 00 Fax +46 16 42 80 01 E-mail: info@westermo.com www.westermo.com REV. C 6651-2271 2022-02 Westermo Network Technologies AB, Sweden...

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