Garmin VHF 300i Installation Instructions - Page 7

To create a basic NMEA 2000 network: 1. Connect two T-connectors (not included) together by their sides. 2. Connect a NMEA 2000 power cable (not included) to one of the T-connectors. notice: A NMEA 2000 power cable must be connected to a 12 Vdc power source through a switch. The NMEA 2000 network may drain your battery if it is connected directly. Connect the cable to the ignition switch of the boat if possible, or through an appropriate additional switch. 3. Connect a NMEA 2000 drop cable (not included) to the other T-connector and to the NMEA 2000 port on the VHF 300 Series transceiver box. 4. Add additional T-connectors for each device you add to the NMEA 2000 network, and connect each device to a T-connector with a drop cable. 5. Connect terminators (not included) to each end of the combined T-connectors. Connecting the VHF 300 Series to a NMEA 0183 Device The following diagram illustrates the NMEA 0183 wiring used to connect your VHF 300 series radio to a GPS chartplotter. Connect NMEA 0183 bare wires as indicated in the following illustration. Use 22 AWG wire for extended runs of wire, if needed. VHF 300 transceiver box Wire Color and Function Fuse 10A Red-power (+) Black-ground (-) + - Battery 12 Vdc Wire Function Power + Ground - > > White-Rx A (+) Orange/White-Rx A (-) > Gray-Tx A (+) > Pink-Tx B (-) Tx A (+) > Tx A (-) > Rx A (+) > Rx B (-) > NMEA 0183compatible chartplotter Connecting a VHF 300 Series Radio to a NMEA 0183 Device Notice: Cover the connections with a waterproof, adhesive tape, such as rubber vulcanizing tape, to prevent water from seeping into the radio. Connecting the VHF 300 Series Radio to a Hailer Horn (Optional) 1. Follow the mounting instructions provided by the manufacturer of your hailer horn if it is not already mounted. 2. Consult the manufacturer of your hailer horn to identify the positive and negative wires or terminals. 3. Use the VHF 300 Series Hailer-Horn Wiring Assignment Table to identify the positive and negative wires. Cable VHF 300 power/ data cable Wire Color Yellow Green Function Hailer-horn positive (+) Hailer-horn negative (-) 4. Wire the correct positive and negative wires from the VHF 300 power/data cable to the passive speaker. VHF 300 Series Hailer-Horn Wiring-Assignment Table 5. Use 22 AWG wire for extended runs of wire, if needed. Notice: Cover the connections with a waterproof, adhesive tape, such as rubber vulcanizing tape, to prevent water from seeping into the radio. VHF 300 Series Installation Instructions