Garmin GSD 21 Installation Instructions - Page 9

GSD 21 Sonar Module Serial Wiring for the Garmin GSD 21 to a Single GPSMAP 182/182C/192C/232/292/392/492 INSTALLATION INSTRUCTIONS ON OFF FUSE 3A WIRE COLOR RED BLACK BLUE BROWN SEE NOTE 3 ON OPTION 1 OFF WIRE COLOR RED FUSE 2A BLACK WHITE/BLUE WHITE/BROWN ORANGE BATTERY 10-33 VOLTS DC SEE NOTE 3 OPTION 2 GARMIN GSD 21 SOUNDER MODULE TO TRANSDUCER Notes: 1. You can extend the serial/power wiring of the GSD 21 power/data cable up to 100 ft (30 m) total length. Use the CANet Extension Cable or 22 AWG, 4-conductor shielded cable for data connections and 18 AWG for power. 2. Ground the drain wire at the display unit. Do not ground the drain wire on the sonar unit. 3. The Orange wire must be pulled low (-) in order for the GSD 21 to power on. Option 1: If the GSD 21 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 21 and the GPSMAP 182/182C/192C/232/292/392/492 turns on or off when power is applied or removed from the Red wire. Option 2: If the Red (+) wire is applied directly to a power source, install a switch between the Orange wire and ground. The GSD 21 turns on or off when ground is applied or removed from the Orange wire. 4. When crimping the 3-wire connector, use a standard pair of pliers and make sure the button is fully depressed into the connector. 7