Raymarine NMEA 0183 Owner'S Handbook Manual Download | Manualshive

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NMEA Multiplexer

Owner’s Handbook

Document Number: 81250-1

Date: February 2005

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Summary of Contents for NMEA 0183

Page 1: ...NMEA Multiplexer Owner s Handbook Document Number 81250 1 Date February 2005 ...

Page 2: ... Copyright Raymarine UK Ltd 2005 ...

Page 3: ...and this guide EMC Installation Guidelines All Raymarine equipment and accessories are designed to the bestindustry standards for use in the recreational marine environment Their design and manufacture conformsto the appropriate Electromagnetic Compatibility EMC standards but correct installation isrequired to ensure thatperformanceisnotcompromised Althougheveryefforthasbeentaken to ensure that th...

Page 4: ...is willnotdamagetheequipment butmaycausethelossofsomeinforma tion and may change the operating mode Raymarine specified cablesare used Cutting and rejoining these cables cancompromiseEMCperformanceandmustbeavoidedunlessdoingso is detailed in the installation manual If a suppression ferrite is attached to a cable this ferrite should not be removed Iftheferriteneedstoberemovedduringinstallationitmus...

Page 5: ...t ii Introduction 1 Inputs outputs 1 NMEA inputs 2 Input priorities 2 NMEA outputs 2 Installation 3 Mounting 3 Connections 4 Real time or buffered inputs 4 NMEA in 4 NMEA out 5 Power supply 6 CAUTION Electrical Safety 7 Securing cables 7 Indicators 7 Data indicator lit 7 Overflow indicator lit 7 Both indicators lit 8 Maintenance 8 Disposal 8 Specifications 9 ...

Page 6: ...iv ...

Page 7: ... NMEA Multiplexer has Four NMEA inputs listener ports NMEA In 1 2 3 4 One NMEA output talker port NMEA Out One common terminal NMEA Out Com Data Overflow NMEA In 1a NMEA In 1b NMEA In 2a NMEA In 2b NMEA In 3a NMEA In 3b NMEA In 4a NMEA In 4b NMEA Out a NMEA Out b NMEA Out Com NMEA Out Shld NMEA In Shld Not used PWR 12 24V GND D7684 1 NMEA 0183 Multiplexer ...

Page 8: ...s fed via a discrete buffer for each port Each buffer holds approximately 2 seconds of NMEA data Input priorities Data at the listener ports is prioritized so that each NMEA in port isread twiceasoftenasthenext one Thusfor example data atinput 1isreadintwiceasoften asdataat input 2 fourtimesas often as input 3 and eight times more often than input 4 NMEA outputs TheNMEAOut talker portisadifferenti...

Page 9: ...as shown in the following illustration D7556 1 Da ta Ov erflo w NMEA 0183 Multiplexer Da ta Ov erflo w NMEA 0183 Multiplexer 1 2 4 3 Place the NMEA Multiplexer at the intended location and mark holes for fixing screws Drill two 1 8 3 4 mm pilot holes for NMEA Multiplexer screws Secure the NMEA Multiplexer with the screws provided Countersink pilot holes to prevent damage to the mounting surface ...

Page 10: ... These inputs will store only one NMEA sentence at a time and thus prevent unwanted delays Slower data that is input as a burst should be connected to either NMEA In 3 or NMEA In 4 as buffered inputs This includes data such as GPS route and depth information for whichthetimingislesscritical Theseinputscanstoremultiple sentences 12 to 70 depending on length This is necessary for devices such as GPS...

Page 11: ...plexer NMEA out Device with single ended NMEA output Ground NMEA Multiplexer Note NMEA outputs from Raymarine products are differential Shield D7587 1 NMEA In a NMEA In b Device with differential NMEA output shield connection Cable shield NMEA out NMEA Multiplexer NMEA In a NMEA In b Shld Device with differential NMEA output but no shield connection NMEA out NMEA out Cable shield Cable shield NMEA...

Page 12: ...ruments and or computer Protect the power supply with a 0 5 A fuse The wires used to connect the power supply must be less than 50 m in length and have a total cross sectional area of at least 0 2 mm2 The following examples represent the minimum requirement Device with differential NMEA input NMEA in Device with single ended NMEA input Ground NMEA in NMEA in NMEA Multiplexer NMEA Out a NMEA Out b ...

Page 13: ...ps to make sure the cables are physically secure and cannot be accidentally pulled from their connectors Indicators Data indicator lit AgreenDataLEDblinkswhenvalidNMEAdataisreceivedatthe listener ports to indicate satisfactory connection and polarity of the connected device The Data LED will not blink if the input polarity is reversed Overflow indicator lit A red Overflow LED indicates a buffer ov...

Page 14: ...evices to different listener ports Both indicators lit Both LED s will blink once when power is applied to the NMEA Multiplexer If the red LED stays lit this indicates that a hardware error was found during self test Maintenance There are no user serviceable parts inside the Raymarine NMEA Multiplexer However periodically check to ensure that the connections to it are secure and that the condition...

Page 15: ...nd wire Current consumption 70 mA maximum with fully loaded talker ports Inputs 4 x NMEA 183 galvanically isolated Input resistance 800 Ohm Outputs 1 x NMEA 183 Buffers 2 buffers of 1000 characters NMEA In 3 and NMEA In 4 only NMEA Out Combined data from NMEA inputs Speed NMEA in 4800 baud Speed NMEA out 4800 baud Indicators Overflowand DataLEDs Dimensions 138 x 72 x 33 mm Housing Flame retardant ...

Page 16: ...ur Road Portsmouth Hampshire PO6 3TD United Kingdom Tel 44 0 23 9269 3611 Fax 44 0 23 9269 4642 www raymarine com Raymarine Inc 22 Cotton Road Unit D Nashua New Hampshire 03063 4219 USA Tel 1 603 881 5200 Fax 1 603 864 4756 www raymarine com ...

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