RS-232 Basics | Raymarine Marine GPS System specification

Appendix A – Connecting Peripheral Instruments

Important: when performing the above connection, be sure you connect the devices directly; do not use the vessel’s DC ground circuit to carry the Transmit (negative) signal. You may encounter devices that do not properly implement the NMEA specification, and share their Transmit (negative) lead with the device’s DC power ground circuit. In this case, you must still run a cable directly between the Transmit (negative) and Receive (negative) leads as previously stated

— do not share the DC power ground circuit.

RS-232 Basics

Most desktop and laptop computers have RS-232 ports. An RS-232 port uses a 3-wire interface, in which the transmit and receive leads reference the same signal ground. It is important not to confuse the RS-232 cable’s signal ground with the vessel’s power ground circuit. While the vessel’s power ground may coincidentally be at the same level as the RS-232 signal ground, there is no industry standard that requires this. Since the RS-232 transmit and receive data signals reference a common signal ground to maintain their integrity,

you must connect the signal ground circuit directly between the two RS-232-linked devices.

To wire an RS-232 device to another RS-232 device, connect:

1.Device A’s Tx lead to Device B’s Rx lead.

2.Device A’s Rx lead to Device B’s Tx lead.

3.Device A’s Signal Ground (SGnd) lead to Device B’s SGnd lead.

RS-232 uses a common ground, which differs in electrical specification from the NMEA’s transmit/receive-pair arrangement. Because of these signal level differences, the way you interconnect an RS-232 device and an NMEA device varies with the application.

Note: You may also encounter voltage differences when interconnecting older RS-232/NMEA hardware - use care.

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Raymarine Marine GPS System manual RS-232 Basics

Contents

Distributed by Navigator Disclaimers and Warranty Technical Accuracy Guide Description Generall Conventtiions Conventions Telephone Europe Telephone United StatesEmail Address Mailing AddressesPage Table of Contents Using Navigators Interface Customiiziing the Interface Working With Charts and Routes4-1 Measurriing Range and Bearriing Usiing VRM//EBL Usi ing Sonar Wi ith Navi igator Appendix a Connecting Peripheral Instruments Welcome to RayTech Navigator Chapter Introduction Multiple Chart Formats for Flexibility Easy Marine Navigation Using Routes and Waypoints Comprehensive Weather/Oceanographic Reporting Navigator’s Toolbars, Functionbars, and Databoxes Contour Display Sail Racer Module Optional Modules Fishing Pro Module Before You Begin Overview Setting Your PC Monitor’s Colors for Best Display Hardware RequirementsMinimum System Requirements Installing Navigator Installing From a CDTo install Navigator from a CD InstallShield Wizard Welcome Screen InstallShield Wizard Customer Information Screen InstallShield Wizard Setup Type Screen ISW Custom Setup screen choices are defined as follows InstallShield Wizard Ready to Install Screen Installing From the Internet Main Interface Component Descriptions Chapter Using Navigator’s Interface Navigator’s Main Interface Drop-Down Menus File MenuWaypoint Menu Tools Menu Route Menu View Menu Tools/Pre-Start Menu Help Menu Window Menu Toolbars Standard ToolbarWaypoints and Routes Toolbar Alarm Toolbar Charting Toolbar Tides/Currents Toolbar Animation Toolbar Fishing Toolbar View Toolbar Yacht Racing Toolbar Pre-Start ToolbarWeather Toolbar Functionbar Menus Pathfinder Panel ToolbarStandard Functionbar 22. Standard Functionbar Menu Hierarchy Route Button Goto ButtonMarks Button Second-Level More Button Top-Level More Button Weather Animation Button File Button Radar Functionbar Setup Button 31. Radar Functionbar Menu Hierarchy Heading Mode Button Targets ButtonMarpa Button 35. Radar Functionbar Gain Button Descriptions Gain Button 36. Radar Functionbar VRM/EBL Button Descriptions VRM/EBL Buttons Tune Button Sonar Functionbar 38. Sonar Functionbar Menu Hierarchy Zoom Button Frequency Button Scope Button Bottom Lock Button 43. Sonar Functionbar VRM/EBL Button Descriptions 44. Sonar Functionbar Alarm Button Descriptions Alarm Buttons Customizing the Interface Using the Customize Dialog Box To customize drop-down menus Commands Tab Toolbars Tab To reset Toolbars to original default settingsTo display the Toolbars tab To create and name a custom Toolbar 46. Customize Dialog Box Toolbars Tab Keyboard Tab To associate keystrokes with commands 48. Customize Dialog Box Menu Tab Menu Tab To display the Options tab Options Tab About Using Charts with Navigator Installing Charts Installing MapTech PCX and NOAA/BSB Charts Where to Store Charts RayTech Settings Dialog Box Chart Installer Screen Chart Manager Screen 1 Showing Installed Charts Working With Routes To create and name a route Creating a Route Beginning a Route Completing a Route Editing Routes and Waypoints Waypoint Basics Adding, Moving, and DeletingTo add a waypoint to a route 11. Edit Route Dialog Box Adding a Waypoint to a Route 12. Moving a Waypoint To move relocate a waypoint 13. Moving the Waypoint You Are Approaching To The Vessel 15. Placing a Waypoint At The Vessel’s Current Position To put a new waypoint at your vessel’s current position 17. Placing a Waypoint At The Cursor’s Current Position To put a new waypoint at the cursor’s current position 18. Placing a Man Overboard Marker 19. Deleting a Waypoint To delete a waypoint from a route Modifying Waypoints To modify a waypoint’s display characteristics Working With Charts And Routes To set one waypoint as relative to another Setting Relative Waypoints To return a waypoint to its relative coordinates To temporarily set one waypoint to specific coordinates To create a new waypoint group Working With Waypoint Groups 22. Renaming a Waypoint Group To rename a waypoint group 23. Deleting a Waypoint Group To delete a waypoint group 24. Showing or Hiding a Waypoint Group To display or hide a waypoint group To retrieve waypoints from the recycle bin Using the Waypoint Recycle Bin 26. Retrieving Waypoints From The Recycle Bin Chapter Advanced Navigator Functions Using Radar With Navigator RayTech Navigator User’s Guide Displaying the Radar Screen To overlay radar data on top of a chartDisplaying the Top Line Status Header To display radar data in a separate window To display the Control Panel Displaying the Control Panel Using the Pathfinder Panel Toolbar Changing the Range Using the Range Control Radar Range Scales Standard Range Scale Radar Range Determining Actual Radar Range Interpreting and Adjusting the Radar Picture Identifying False Echo Returns Controls to Adjust the Radar Picture Indirect False Echoes Side Lobes Blind Sectors or Shadow Effect Multiple Echoes Radar Gain Control To adjust the Gain Radar Sea Clutter Display Sea Clutter Control To adjust Sea Clutter control Radar Rain Clutter Display Rain Clutter Control To adjust the Rain and FTC controls Tuning the Receiver That you leave the Tune control in Auto modeTo tune the radar Changing the Target Display To change target mode settings Target Expansion Interference Rejection Target Wakes Measuring Range and Bearing Using VRM/EBL RayTech Navigator User’s Guide To access VRM/EBLs Using VRM/EBLMeasuring Range and Bearing to Target from Vessel Click Moving a VRM/EBL To move a VRM or EBLTo Move Click To place a mark symbol at the current vessel location To place a mark symbol at the cursor positionPlacing Marks To remove marks Introduction to Marpa Safety Notices Target Data Risk Assessment Radar Range Scales Target Vector and History To acquire a Marpa target Acquiring a Marpa Target Using the Marpa Dialog Box Deleting a Marpa TargetTo remove a target from the Marpa database To clear a target To acquire a targetTo view target data the Marpa List To view selected target data in the Marpa box To display sonar data in a separate Navigator window Using Sonar With Navigator Pathfinder Panel for Sonar To display the depth of the fish Fish Indications Effect of Frequency and Boat Speed Bottom Indications To toggle on and off the Target Depth ID Depth Target ID Selecting the Background Color Changing the Scroll SpeedTo change the background color To pause the scrolling display To change the scrolling speed To adjust the range and shift values Adjusting the Range Control Selecting the Power Setting To change the power settingSelecting the Frequency To change the frequency Adjusting Display Gain Sensitivity To adjust the Color Gain Adjusting Color Gain Using the A-Scope To display the A-Scope imageTo remove the A-Scope image To display the Bottom Lock image Using Bottom Lock Using Zoom Using the White LineTo switch the white line feature on and off To use zoom Using Alarms To set an alarm Using VRM To use the VRM To Place a Waypoint Using Waypoints 13. Typical Polars Plot Screen Using Polars to Optimize Your Performance Entering and Editing Data Collecting Data 14. Polar Parameters Screen Polar Parameters Screen Advanced Navigator Functions 15. Data Tests Screen Data Tests Screen Advanced Navigator Functions RayTech Navigator User’s Guide ForestayStrain Displays only those tests that To graph a Polar plot, do the following How to Graph and Read a Polar Plot RayTech Navigator User’s Guide 18. Polar Plot Example Screen 19. Upwind Plot Screen Using the Upwind, Downwind, and Vmc Plot Screens 20. Downwind Plot Screen 21. Vmc Plot Screen Boat Speed Calibration Calibrating to Ensure Data Accuracy Apparent Wind Angle Calibration Compass Calibration True Wind Angle Calibration 22. Twa Corrections Screen 23. Tws Corrections Screen True Wind Speed Calibration Using the Engine Instrument Panel 24. Single Engine Instrument Panel with Tachometer Displaying the Panel 25. Engine Panel Settings Screen Showing Instruments Tab Configuring the Panel 26. Engine Panel Setting Screen Showing Panel Tab Appendix a Connecting Peripheral Instruments Figure A-1. Raymarine Nmea Connection Cable, Part No. E86001 Connecting to Instruments Via an Nmea Cable Table A-1. Connecting Navigator Directly to GPS System Connecting Directly to a GPS Connect Cable Color To Nmea Instrument Lead Connecting Directly to NMEA-Equipped Instruments Table A-3. Connecting Navigator Directly to Radar System Connecting Directly to Radar Table A-4. Connecting Navigator Directly to Autopilot System Connecting Directly an Autopilot Connecting to a Raymarine Direct SeaTalk Interface Connecting Specific Instruments and Devices Figure A-1 and Table A-5 Connecting to a Raytheon Autohelm System Connecting to B&G Instruments Table A-6. Connecting Navigator to a B&G Performance BoardTable A-7. Connecting Navigator to a B&G Nmea FFD Display Table A-8. Connecting Navigator to a KVH Race Box Connecting to KVH Instruments Connecting to Ockam Instruments Nmea Basics Basic Nmea and RS-232 Cabling Principles RS-232 Basics RayTech Navigator User’s Guide Circuit Grounding Issues Proper Cable ShieldingPreventing Interference and Crosstalk Pin Serial Direct Connecting With a KiwiTech Cable RayTech Navigator Version Raymarine Interim Sheet Click Send Now Click Save Now Create Route Charting Enhancements New Databoxes Other Vessel Tracking DataTrak Enhancements