Garmin GPS 150XL Installation Manual

The Garmin GPS 150XL is a high-performance marine GPS receiver designed for precise navigation. This manual provides essential information for the safe and proper installation, configuration, and basic operation of the unit. It covers mounting, power and antenna connections, initial setup, interface connections, and basic troubleshooting to ensure optimal performance on your vessel.

Features at a Glance

Key components: GPS 150XL Main Unit, Remote GPS Antenna, Power/Data Cable, Mounting Hardware, Documentation.

Installation Overview

Plan your installation carefully. Choose a location for the main unit that is protected from direct spray, within easy view and reach of the helm, and away from magnetic compasses. The antenna requires a clear, unobstructed view of the sky.

1. Mount the Main Unit: Select location and secure using provided bracket.
2. Run the Antenna Cable: Route from antenna location to main unit.
3. Connect the Antenna: Plug antenna cable into main unit.
4. Connect Power: Connect red (positive) and black (negative) wires to vessel's DC system.
5. Connect NMEA Devices (Optional): Wire data out/in to chartplotter or other instruments.
6. Power On & Initialize: Turn on power and allow unit to acquire satellite signals.

WARNING! Disconnect all power before making electrical connections. Ensure all wire connections are properly insulated and protected from moisture.

Mounting the Unit

The main unit should be mounted on a flat, stable surface using the swivel bracket provided.

1. Position the mounting bracket at the desired location and mark the screw holes.
2. Drill pilot holes for the mounting screws.
3. Secure the bracket to the surface using the supplied screws and appropriate sealant if drilling into cabin top or deck.
4. Attach the GPS 150XL unit to the bracket by sliding it onto the rail and tightening the locking knob.
5. Adjust the viewing angle as needed and tighten the swivel lock.

CAUTION! Do not mount in a location where it will be subjected to high temperatures (e.g., directly above an engine) or where it may obstruct the operator's view.

Electrical Connections

Connect the 4-pin power/data cable to the rear of the GPS 150XL unit.

Tip: Keep power wire runs as short as possible. Use marine-grade wire and terminals. Protect all connections with heat-shrink tubing or liquid electrical tape.

Antenna Installation

The remote antenna must have a clear, 360-degree view of the sky. The magnetic mount is for temporary use; for permanent installation, use the optional fixed mount.

1. Clean the mounting surface (e.g., cabin top, radar arch).
2. Place the magnetic antenna on the chosen location. Ensure it is away from tall obstructions and other transmitting antennas (VHF, radar).
3. Route the antenna cable to the main unit. Use cable clamps to secure it. Avoid sharp bends and do not cut or splice the cable.
4. Connect the antenna cable's BNC connector to the "ANTENNA" port on the rear of the GPS 150XL unit. Hand-tighten only.

WARNING! Do not place the antenna where it may be stepped on or where heavy objects may fall on it. Ensure the cable is not pinched by hatches or doors.

Initial Power-Up & Setup

Once all connections are made, you can power on the unit.

1. Ensure the antenna is properly connected and positioned.
2. Apply DC power to the unit. The display will light up.
3. The unit will begin searching for satellites. This initial acquisition may take up to 15 minutes if the unit's almanac data is old or if it has been moved over 300 miles since last use.
4. Once 3D GPS navigation is established (indicated on the display), you can configure initial settings if necessary via connected NMEA devices. The GPS 150XL primarily outputs raw data; most user interface is handled by a connected chartplotter.

CAUTION! Do not operate the vessel until the GPS has acquired a valid 3D fix and position accuracy is confirmed.

NMEA 0183 Interface

The GPS 150XL outputs standard NMEA 0183 sentences to interface with other marine electronics.

• Supported Sentences: GGA, GLL, GSA, GSV, RMC, VTG, ZDA.
• Baud Rate: 4800 (default, fixed).
• Wiring: Connect the Blue (Data Out +) and Brown (Data Out -) wires to the corresponding NMEA Input ports on your chartplotter, autopilot, or other device. Refer to that device's manual for specific wiring details.
• Data Input: The GPS 150XL does not accept NMEA input for configuration; it is a dedicated GPS receiver.

Tip: Use shielded, twisted-pair wire for NMEA connections and keep the runs away from engine wiring and other sources of electrical noise.

Basic Operation

The front panel LEDs and display provide status information.

The unit operates continuously once powered. There are no user buttons on the GPS 150XL itself; all interaction is through the connected system receiving its NMEA data.

Care & Maintenance

Unplug power before cleaning. Use a soft, damp cloth with mild soap to clean the exterior. Do not use harsh chemicals, solvents, or abrasives.

CAUTION! Ensure the antenna connector and cable entry points are free of corrosion and are properly sealed. Inspect wiring periodically for chafing or damage.

Regulatory Information

This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. This device complies with Industry Canada licence-exempt RSS standard(s).

Copyright © Garmin Ltd. or its subsidiaries. Garmin and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries.

For technical support, visit www.garmin.com/support or contact Garmin Product Support.

Troubleshooting

Reset: Disconnect power for 30 seconds, then reconnect to perform a cold start.

Service: Do not open the unit. Contact Garmin Product Support for service inquiries.