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Installation | RS20 operator manual
Connect the radio wiring
All wiring on the radio should be done with the vessel power supply
turned off. While radio power is polarity protected, the fuse will
blow if connection is made wrong way round. Ensure any unused
bare wires are isolated from each other, to prevent the potential of
a short circuit. If using the NMEA 2000 connection, ensure network
topology rules are followed closely.
Warning: never operate the radio without the antenna
connected. This may damage the transmitter.
The connectors are on the rear of the base unit, as follows:
+
_
2
3
4
5
6
7
8
9
10
11
1
T
T
+
_
1. NMEA 2000 network connection. Can be connected to a NMEA 2000
compatible MFD with built in GPS or external GPS antenna.
2. External speaker + (gray): connect to 4 Ohm, 4 Watt (minimum) external
speaker positive
3. External speaker - (gray/black): connect to 4 Ohm, 4 Watt (minimum)
external speaker negative
4. NMEA 0183 RX_A (yellow): connect to TX_A of chart plotter, or active GPS
antenna
5. NMEA 0183 RX_B (green): connect to TX_B of chart plotter, or active GPS
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