Manual Document reference 813001 Date June 2007Raymarine SeaTalk SeaTalk2 SeaTalkng and ST70 are trademarks of Raymarine plc DeviceNet is a trademark of Open DeviceNet Vendor Association Inc Handbook contents copyright Raymarine plcContents iii WARNING Electrical safety iii EMC conformance iii Product documents iii Product disposal iii Waste Electrical and Electronic WEEE Directive iiiChapter 1Description 1 11 SeaTalkng overview 1 Introduction 1 Terminology 1 Connectability 1 12 Hardware 1 Color coding 2 Important you must fit Terminators 2 Available parts 2 Other cables 4 Connectors 4 13 Using SeaTalkng 4 Typical applications 5 General guidelines when using with other systems 6 Basic rules 6 Limitations when SeaTalk1 products are connected 6 Using with SeaTalk1 6Chapter 2Installation 9 21 Preparation for installation 9 EMC installation guidelines 9 Remember 9 Suppression ferrites 9 Connections to nonRaymarine equipment 9 Tools required 9 System structures 10 Power supply considerations 10 Product loading 10 Power sources 10 Protection 10 Power connection point 10 Balanced system 10 Small systems 11 Permitted power loading 11 Balanced system loading 11 Unbalanced system loading 11 System limitations 12 Cabling 12 22 Procedures 13 General requirements 13 Making connections 14 Running cables 14ii SeaTalkng Reference Manual Installing Backbone 15 CAUTION Backbone Extender 15 Connecting spurs 15 Connecting power 15 CAUTION Do not connect power until installation is complete 15 Balanced system 15 Unbalanced system 16 Fitting Terminators 16 Fitting Blanking Plugs 16Chapter 3Post installation procedures 17 31 Checks 17 32 Maintenance 17 33 17 Technical support 17 World wide web 17 Telephone help line 18 Help us to help you 18Index 19Preface iiiPreface WARNING Electrical safety Make sure you have switched off the power supply before you start installing this productEMC conformance All Raymarine equipment and accessories are designed to the best industry standards for use in the recreational marine environment The design and manufacture of Raymarine equipment and accessories conform to the appropriate Compatibility EMC standards but correct installation is required to ensure that performance is not documents This manual gives information on the Raymarine SeaTalkng system It should be read in conjunction with the documents for the individual products that connect to SeaTalkng To the best of our knowledge the information in this document was correct when it went to press However Raymarine cannot accept liability for any inaccuracies or omissions in product documents In addition our policy of continuous product improvement may change specifications without notice Therefore Raymarine cannot accept liability for any differences between the product and the accompanying disposal Waste Electrical and Electronic WEEE Directive The WEEE Directive requires the recycling of waste electrical and electronic equipment Whilst the WEEE Directive does not apply to some of Raymarines products we support its policy and ask you to be aware of how to dispose of this product The crossed out wheelie bin symbol illustrated above and found on our products signifies that this product should not be disposed of in general waste or landfill Please contact your local dealer national distributor or Raymarine Technical Services for information on product disposaliv SeaTalkng Reference ManualChapter 1 Description 1Chapter 1 Description11 SeaTalkng overview Introduction SeaTalkng is an bus for Raymarine products and comprises a main backbone to which Raymarine products are connected via spur cables see Figure 11 Power Instrument Supply Display Spur Spur Backbone Backbone Terminator Terminator Spur Spur Spur Spur Spur Instrument Instrument Instrument Transducer Transducer Adaptor cable NMEA2000 Adaptor cable SeaTalk1 D102381 ng Figure 11 SeaTalk overview Terminology Raymarine produces SeaTalk SeaTalk2 and SeaTalkng proprietary bus systems In this book in the interests of clarity SeaTalk is referred to as SeaTalk1 Connectability Specific Raymarine products eg ST70 instruments perform a bridging function to enable you to connect SeaTalkng to SeaTalk1 products via appropriate adaptor cables Adaptor cables are also available to connect NMEA2000 products12 Hardware SeaTalkng comprises a single backbone terminated with two terminators one at each end Spur cables connect the backbone to individual SeaTalkng products Small diameter cable connectors are used throughout the system to make installation easier Cables and connectors are colorcoded to reduce the likelihood of misconnection A wide range of different cable lengths provides flexibility and obviates the need for cutting and splicing cables Threeway five way and inline connection pieces are available to connect cables to deploy SeaTalkng as required2 SeaTalkng Reference Manual Color coding Cables and connectors are colorcoded to facilitate correct connection The color codes are Backbone is blue Spurs are white A power cable is also provided and is colorcoded with a red strip Important you must fit Terminators In order to ensure correct data transmission through a SeaTalkng system a Terminator is required at each end of the backbone cable run Dedicated Terminators are available for this purpose Do NOT attempt to run a system that is not correctly terminated Available parts The following parts are cable Part numbers 1 ft 3 in 400 mm A06033 3 ft 3 in 1 m A06034 9 ft 10 in 3 m A06035 16 ft 4 in 5 m A06036 65 ft 7 in20 m A06037Spur cable Part numbers 1 ft 3 in 400 mm A06038 3 ft 3 in 1 m A06039 9 ft 10 in 3 m A06040 16 ft 4 in 5 m spur to backbone Part number A060285Way spurs to backbone Part number A06064Backbone two backbone cables Part number A06030Chapter 1 Description at each end of backbone Part number A06031Blanking PlugInserted into unused spur in 5way connector T Piece Part number A06032Elbow Spur cable 1 ft 3 in 400 mmFor spurs in confined spaces Part number A06042SPX Spur cableConnects SeaTalkng to Raymarine SPXCourse Computers Part number To be announcedPower cableConnects SeaTalkng 12 V dc supply Part number A06049Stripped End Spur cableConnects products which do not haveplugin connectors eg transducerpods Part numbers 1 m A06043 3 m A06044SeaTalk Adaptor cableConnects SeaTalkng products toSeaTalk1 Part number A06047SeaTalk2 adaptor cableConnects SeaTalkng products toSeaTalk2 Part number female adaptor cableConnects SeaTalkng products toNMEA2000 Part number A060454 SeaTalkng Reference male adaptor cableConnects SeaTalkng products toNMEA2000 Part number A06046ESeries Adaptor cableConnects SeaTalkng products toRaymarine ESeries Displays Part number Reference Manual Part number 813001Backbone Kit Part number A25062 Comprises Two terminators One 65 ft 7 in 20 m Backbone cable Two 16 ft 4 in 5 m Backbone cables Four T Piece connectors One Power Cable One SeaTalkng Reference Manual this book Other cables In addition to the parts listed a range of connector cables is available from your Raymarine dealer to connect to other Raymarine products and systems Connectors SeaTalkng connectors are lockable to ensure reliable secure connectivity Keyways on the connectors ensure correct orientation Locking collars on the SeaTalkng TPiece 5Way Connector and Backbone Extender rotate to lock the connections Molded arrow indicators on the connectors align to show when the connector is unlocked13 Using SeaTalkng A complete SeaTalkng backbone comprises two or more backbone cables connected in series There must be only one backbone and this must be terminated with two ter minators one at each end of the backbone Do NOT connect a terminator to any spur In a SeaTalkng system and any system to which it is connected As a general rule there must only be one data source transducer for each data type Although some products may be permitted as secondary data sources do not duplicate the source for any data unless permission is specifically given in the relevant product documents There must be only one power source It is particularly important to be aware of these requirements when connecting to another system For example in Raymarine SeaTalk1 power is often supplied from the system 1 Description 5 You can use SeaTalkng As a selfcontained system in which only products fitted with SeaTalkng connectors are connected via spur cables to the SeaTalkng backbone As an extended system connected to SeaTalk1 products via an adaptor cable You must NOT connect a SeaTalkng system to a SeaTalk2 system You may connect specific SeaTalkng products eg ST70 instruments to existing SeaTalk1 and SeaTalk2 systems using the appropriate adaptor cables Refer to the instructions with these products for details of how to connect them As it is obviously not possible to describe all possible configurations for SeaTalkng general guidelines are given here Typical applications A typical SeaTalkng system is shown in Figure 12 It comprises the main backbone with compatible products connected via spur cables SeaTalk ng CANCEL ENTER Wind transducer pod MENU CANCEL ENTER MENU Spur CANCEL ENTER MENU Spur Spur T Piece SeaTalkng Backbone Terminator T Piece 5Way Connector 12 V dc Power Supply Power cable CANCEL ENTER MENU Spur CANCEL ENTER MENU T Piece T Piece SeaTalkng Backbone Terminator T Piece Spur Spur Spur Speed Pod transducer Depth Pod transducer D101941 Figure 12 Typical basic SeaTalkng system6 SeaTalkng Reference Manual General guidelines when using with other systems Basic rules If SeaTalkng is connected to any other system ensure that in the combined system You connect only one source for any data type unless permission is specifically given in the relevant product documents You connect only one power source Limitations when SeaTalk1 products are connected If SeaTalkng and SeaTalk1 products are used together do NOT connect an NMEA2000 backbone as this product combination could compromise the integrity of the NMEA2000 system Using with SeaTalk1 Provided you do not want to connect to NMEA2000 you can connect a SeaTalkng system to SeaTalk1 using a suitable SeaTalkng bridging product such as an ST70 instrument and adaptor cables to connect the two systems If you intend doing this note that You can connect a single SeaTalk1 network to SeaTalkng using an adaptor cable and one bridging product eg ST70 instrument You can connect two separate SeaTalk1 networks to SeaTalkng using different adaptor cables and bridging products eg ST70 instruments but the two SeaTalk1 networks must NOT be connected together Summaries of acceptable and unacceptable scenarios are shown in Figure 13 and Figure 14 1 Description 7 To other SeaTalk ng Backbone SeaTalkng To other SeaTalk ng products ST70 ST70 products Spur Spur CANCEL ENTER CANCEL ENTER MENU MENU ng SeaTalk to SeaTalk1 adaptor cable SeaTalk1 TRUE TACK DEPTH RESET DISP VMG ALARM OFFSET APP To other SeaTalk ng Backbone SeaTalkng To other SeaTalk ng products ST70 ST70 products Spur Spur CANCEL ENTER CANCEL ENTER MENU MENU ng ng SeaTalk SeaTalk to SeaTalk1 to SeaTalk1 adaptor cable adaptor cable SeaTalk1 SeaTalk1 TRUE TACK DEPTH RESET TRUE TACK DEPTH RESET DISP VMG ALARM OFFSET VMG ALARM OFFSET APP DISP APP D103141 Figure 13 acceptable scenarios8 SeaTalkng Reference Manual To other SeaTalk ng Backbone SeaTalkng To other SeaTalk ng products ST70 products Spur Spur CANCEL ENTER MENU No bridging product SeaTalk1 TRUE TACK DEPTH RESET DISP VMG ALARM OFFSET APP To other SeaTalk ng Backbone SeaTalkng To other SeaTalk ng products ST70 ST70 products Spur Spur CANCEL ENTER CANCEL ENTER MENU MENU SeaTalkng SeaTalkng to SeaTalk1 to SeaTalk1 adaptor cable adaptor cable SeaTalk1 TRUE TACK DEPTH RESET DISP VMG ALARM OFFSET APP To other SeaTalk ng SeaTalkng Backbone To other SeaTalk ng products ST70 ST70 products Spur Spur CANCEL ENTER CANCEL ENTER MENU MENU SeaTalkng SeaTalk ng to SeaTalk1 to SeaTalk1 adaptor cable adaptor cable SeaTalk1 SeaTalk1 TRUE TACK DEPTH RESET TRUE TACK DEPTH RESET DISP VMG ALARM OFFSET DISP VMG ALARM OFFSET APP APP D103301 Figure 14 unacceptable 2 Installation 9Chapter 2 Installation21 Preparation for installation EMC installation guidelines Raymarine equipment and accessories conform to the appropriate Compatibility EMC regulations This minimizes interference between equipment which could otherwise affect the performance of your system Correct installation is required to ensure that EMC performance is not compromised For optimum EMC performance we recommend that Raymarine equipment and the cables connected to it are At least 3 ft 1 m from any equipment transmitting or cables carrying radio signals eg VHF radios cables and antennas In the case of SSB radios the distance should be increased to 7 ft 2 m More than 7 ft 2 m from the path of a radar beam A radar beam can normally be assumed to spread 20 degrees above and below the radiating element The product is supplied from a separate battery from that used for engine start This is important to prevent erratic behavior and data loss which can occur if the engine start does not have a separate battery Raymarine specified cables are used Cables are not cut or extended unless doing so is detailed in the installation manual Remember Where constraints on the installation prevent any of the above always allow the maximum separation possible between different items of electrical equipment This will provide the best conditions for EMC performance for the installation Suppression ferrites Raymarine cables may be fitted with suppression ferrites These are important for correct EMC performance Any ferrite removed to facilitate installation must be replaced in the original position immediately installation is complete Use only ferrites of the correct type supplied by Raymarine authorized dealers Connections to nonRaymarine equipment If Raymarine equipment is to be connected to other equipment using a cable not supplied by Raymarine a Raymarine suppression ferrite MUST always be attached to the cable near the Raymarine unit Tools required Before installing SeaTalkng ensure you have the appropriate tools In most cases a typical fitters toolkit should suffice provided it has tools to enable you to Drill holes for cable runs Connect prepared bare wire ends to terminal blocks10 SeaTalkng Reference Manual System structures Plan the route of the SeaTalkng backbone so that it runs as close as is practicable to the intended location of each SeaTalkng product to keep spur lengths to a minimum Products connect to the backbone via spur cables Spurs connect to the backbone via either a SeaTalkng TPiece or a SeaTalkng 5Way Connector Power supply considerations It is important that power for SeaTalkng is provided from only one power source If you intend using your SeaTalkng system with any other system eg SeaTalk1 power may already be connected to the other system If this is the case do NOT connect an additional power source to SeaTalkng Product loading The number of products you can connect to a SeaTalkng system depends on the power each product consumes and on the physical length of the proposed system Each Raymarine product has a Load Equivalency Number LEN which indicates how much power it consumes Power sources A SeaTalkng system requires one 12 V dc supply connected to the SeaTalkng backbone This can be provided By a battery From a Raymarine Course Computer via SeaTalk andor SeaTalkng Note If a battery is used as a power source it is recommended that in order to avoid sudden voltage drops the battery used for engine starting is NOT used to power SeaTalkng On boats with 24 V dc systems a suitable 24 V to 12 V dc dropper may be used Check with Raymarine Customer Support or your Dealer for suitability Protection The power source must be protected by a 5 A fuse or a circuit breaker providing equivalent protection Power connection point Balanced system We recommend that as a general rule power is connected to a SeaTalkng system in such a way that the current drawn on each side of the power connection point is equal This is termed a balanced system Figure 21 shows a theoretical balanced system In this system the total LEN of the all products is 40 so the optimum power connection point is a total LEN value of 20 each end of the 2 Installation 11 Terminator Backbone Product A Product B Product C LEN 4 LEN 6 LEN 6 Total system LEN 40 Optimum power connection point 40 2 20 LEN from end of Backbone Backbone Product F Product E Product D LEN 6 LEN 5 LEN 4 Backbone Terminator Product G Prod H Prod J LEN 5 LEN 2 LEN 2 D103471 Figure 21 Where to connect SeaTalkng power in a balanced system Small systems Although the preferred method of connection is to form a balanced system as above in systems where the backbone length is 60 m or less you may connect power at one end of the system to form an unbalanced system Permitted power loading The total load permissible in a SeaTalkng system is defined in terms of the total LEN of all products connected to the system and depends on the length of the backbone Balanced system loading The maximum loading total LEN for balanced SeaTalkng systems of various lengths is given in the following table Note that in each case the total LEN must be divided equally each side of the power connection point Backbone length Total LEN Backbone length Total LEN 197 ft 60 m or less 100 394 ft 120 m 50 262 ft 80 m 84 459 to 525 ft 140 to 160 m 40 328 ft 100 m 60 591 to 656 ft 180 to 200 m 32 Unbalanced system loading The maximum LEN for unbalanced SeaTalkng systems up to 197 ft 60 m is given in the following table Backbone length Total LEN 66 ft 20 m 40 131 ft 40 m 20 197 ft 60 m 1412 SeaTalkng Reference Manual System limitations In a SeaTalkng system The total length of backbone cable between the two Terminators must not exceed 656 ft 200 m The length of any individual spur must not exceed 16 ft 4 in 5 m The total length of all spurs must not exceed 98 ft 5 in 30 m So for example your system could have 30 spurs each of 3 ft 3 in 1 m or 6 spurs each of 16 ft 4 in 5 m The total LEN in the system must not exceed the value detailed under Permitted power loading Cabling When planning SeaTalkng cable routes see Figure 22 and Figure 23 ensure that the EMC conditions are fulfilled see EMC installation guidelines above In particular do not route cables near fluorescent lights engines and radio transmitting equipment as these may cause interference Taking this into account plan the backbone route to run as close as possible to the intended locations of the products to be connected Spurs to steering Cockpit Terminator SeaTalkng Backbone 5Way Connector Spurs to chart table Below decks Power cable TPiece SeaTalkng Backbone SPX Spur to autopilot 5Way Connector SeaTalkng Backbone Depth Speed Wind transducer transducer transducer pod pod pod TPiece Terminator TPiece TPiece TPiece Alternative connection method for pods D103151 5Way Connector Figure 22 Typical SeaTalkng cablingChapter 2 Installation 13 Spurs to steering Flybridge SeaTalkng Backbone Terminator 5Way Connector Spurs to steering Lower Helm SeaTalkng Backbone 5Way Connector Below decks Spurs to chart table Power cable TPiece SPX Spur to autopilot 5Way Connector SeaTalkng Backbone Depth Speed transducer transducer pod pod TPiece Terminator TPiece TPiece D103311 ng Figure 23 Typical SeaTalk cabling on flybridge vessel22 Procedures General requirements Use only the appropriate lengths of genuine Raymarine SeaTalkng madeup backbone and spur cables Do NOT cut or otherwise modify the cables To minimize the need to coil and stow spare cable always use lengths of cable appropriate to the cable run lengths14 SeaTalkng Reference Manual Making connections Make each SeaTalkng connection as demonstrated in Figure 24 1 Rotate collar to UNLOCKED position so molded arrows are aligned 2 Ensure cable end connector is correctly oriented then fully insert 3 Rotate collar 2 clicks until it snaps into the LOCKED position almost one quarter turn D10 223 1 Figure 24 Connecting cables Running cables When running SeaTalkng cables always do so in accordance with the following guidelines Do not run cables where they are likely to be easily damaged If a cable has to be fed through the deck always use a proprietary deck gland Where cables are fed through holes in bulkheads etc always use the appropriate grommets to prevent chafing Secure long cable runs so they do not present a hazard Do not position cable connectors in bilgesChapter 2 Installation 15 Installing Backbone Build the backbone by running backbone cables between the locations of the products you want to connect spur points At each spur point connect the backbone cables to an appropriate SeaTalkng connecting device either TPiece part number A06028 Use where you want to connect a spur cable to just one product 5Way Connector part number A06064 Use where you want to connect more than one spur cable to products fitted close to one another eg in the cockpit Backbone Extender part number A06030 Use as necessary to connect lengths of backbone cable together CAUTION Backbone Extender The Backbone Extender A06030 is suitable only for connecting backbone cables Do NOT attempt to use it to join spur cables or damage could occur Connecting spurs At each connecting device TPiece or 5Way Connector connect spur cables to the white connectors as required then run each spur cable to the location of the product to be connected Connect each spur cable to the relevant product in accordance with the installation instructions for the product Where space is limited eg behind instrument consoles it may be easier to use an elbow spur cable rather than the conventional straight spur Connecting power This section describes how to connect power to a standalone SeaTalkng system If your SeaTalkng system is connected to any other system eg another SeaTalk system and the other system already has its own power source do NOT connect another power source to SeaTalkng CAUTION Do not connect power until installation is complete Before connecting a power cable to the SeaTalkng backbone ensure it is not connected to a power source For optimum SeaTalkng performance power must be connected in accordance with the conditions described under Power supply considerations on page 10 Whenever possible connect your system as a balanced systemIf it is not possible to do this and the SeaTalkng backbone is less than 197 ft 60 m in length you may connect the power source to form an unbalanced system Ensure that the power source is protected by a 5 A fuse or a circuit breaker providing equivalent protection Balanced system To connect power for a balanced SeaTalkng system 1 Determine the total LEN of the products in the system 2 Divide the total LEN by two and note the value16 SeaTalkng Reference Manual 3 Starting at one end of the system add the LEN of each product in turn until you reach the value calculated at step 2 The point on the backbone between this product and the next is the point where the system load is evenly split 4 At this point fit a TPiece A06028 then Connect a SeaTalkng Power Cable A06049 to the white connector on the TPiece See Figure 25 5 Ensure the power supply is switched off then connect the power cable via a 5 A fuse or equivalent value circuit breaker to the power supply One half system load One half system load Terminator Terminator Backbone system products Backbone system products Power connection point D103501 Figure 25 Connecting power to a balanced system Unbalanced system If the backbone is less than 197 ft 60 m you can connect your power source to form an unbalanced system as follows 1 At one end of the backbone fit a TPiece A06028 then connect a SeaTalkng Power Cable A06049 to the white connector on the TPiece 2 Ensure the power supply is switched off then connect the power cable via a 5 A fuse or equivalent value circuit breaker to the power supply System load Terminator Terminator Short backbone system products Power connection point D103601 Fitting Terminators When the backbone is in position use a suitable connecting device eg a TPiece to connect a SeaTalkng Terminator at each end of the backbone Secure the Terminator by locking it in the same way as for the SeaTalkng connectors Fitting Blanking Plugs When all cables have been run and connected fit a SeaTalkng Blanking Plug to each unused spur connector on SeaTalkng 5Way Connectors and TPieces Secure each blanking plug by locking it in the same way as for SeaTalkng 3 Post installation procedures 17Chapter 3 Post installation procedures31 Checks When the backbone has been fitted and the spur cables connected carry out the following checks before applying power Ensure that SeaTalkng is powered from just ONE 12 V sourceIf SeaTalkng is connected to any other SeaTalk system make sure this system does not have its own separate power source Ensure all backbone connectors are secure Ensure all products are securely connected to their respective spur cables Ensure Terminators are securely fitted at each end of the backbone32 Maintenance Periodically check that System connections are secure The cables for signs of chafing and other damage Replace as necessary33 If SeaTalkng appears not to be operating as it should first check for error messages on any of the products connected to the system If this does not resolve the problem ensure that All products in the system are fully serviceable All system connections are secure All cables are in good condition and that there are no breaks or other damage SeaTalkng is configured correctly as described in Chapter 2 In particular check that There is only one backbone terminated with just two terminators ie one at each end of the backbone Terminators are NOT fitted to any spur Technical support Raymarine provides a comprehensive customer support service on the world wide web and by telephone help line Please use either of these facilities if you are unable to rectify a problem World wide web Please visit the Customer Support area of our web site at As well as providing a comprehensive Frequently Asked Questions section and servicing information the web site gives email access to the Raymarine Technical Support Department and a details of the locations of Raymarine agents worldwide18 SeaTalkng Reference Manual Telephone help line If you do not have access to the world wide web please call our help line In the USA call 1 603 881 5200 extension 2444 In the UK Europe the Middle East or the Far East call 44 0 23 9271 4713 voice 44 0 23 9266 1228 fax Help us to help you When requesting service please quote as much of the following product information for the products connected to SeaTalkng Product type Model number Serial number Software issue number 19Index D5Way Connector 2 DeviceNet Adaptor cable 3 Disposing of the product iiiB Documentation iiiBackbone cable 2Backbone Extender 2 EBackbone Kit 4 Elbow Spur cable 3Balanced system 10 11 Electrical safety iiiBlanking Plug 3 EMC guidelines iii 9 fitting 16 ESeries Adaptor cable 4C FCable routes 12 14 Fuse 10 15Cables Backbone 2 15 L DeviceNet Adaptor 3 LEN values 10 Elbow Spur 3 Locking connectors 4 14 ESeries Adaptor 4 Power 3 M SeaTalk Adaptor 3 Maintenance 17 SeaTalk2 Adaptor 3 Spur 2 15 N SPX Spur 3 NMEA2000 3 6 Stripped End Spur 3Cabling P guidelines 14 Parts list 2 installing Backbone 15 Power cable 3 installing Spurs 15 on flybridge vessel 13 Power loading planning 12 balanced system 11 typical 12 defined by LEN 10 unbalanced system 11Connecting Backbone 15 Power supply cables 14 connecting 15 power 15 balanced system 15 balanced system 15 unbalanced system 16 unbalanced system 16 connection requirement Spur 15 balanced system 10 terminators 16 unbalanced system 11Connecting devices 2 permitted power loading 5Way Connector 2 balanced system 11 Backbone Extender 2 unbalanced system 11 TPiece 2 protection 10 15 requirements 10Connectors Product disposal iii color coding 2 inserting 4 14 locking 4 1420 SeaTalkng Reference ManualS TSafety Technical support 17 electrical iii Terminators 2 3 16SeaTalk Adaptor cable 3 Tools 9SeaTalk1 3 4 6 TPiece 2SeaTalk2 3 5 17SeaTalk2 Adaptor cable 3SeaTalkng U cable length limitations 12 Unbalanced system 11 components 1 2 connectability 1 general usage 4 load limits 10 power supply requirements 10 system structures 10 typical application 5 using with other systems 4 6 SeaTalk1 6Spur cable 2SPX Spur cable 3Stripped End Spur cable 3Raymarine plc Raymarine IncAnchorage Park 21 Manchester PO3 5TD New Hampshire 03054United Kingdom USA 44 0 23 9269 3611 Tel 1 6038815200Fax 44 0 23 9269 4642 Fax 1 6038644756