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Installation | RS90 Installation Manual
Connector 7 - External speakers
Number Label Wire colour
1 GND Black
2 SPK1 Red
3 GND Black
4 SPK2 Red
5 GND Black
6 SPK3 Red
7 GND Black
8 SPK4 Red
You can connect a 4 W 8 Ω or an 8 W 4 Ω speaker to each pair of
speaker terminals.
Connector 8 - Horn button and
NMEA 4800 bps 0183 GPS
Number Label Description
1
RX GPS+ NMEA0183 Input+
Balanced, RS422, GPS data input
2 RX GPS- NMEA0183 Input-
Balanced, RS422, GPS data input
3 TX GPSO NMEA0183 Output+
Connect to ship’s NMEA0183
input
4 GND NMEA0183 Output-
Single end, GND
5 GND Wire to horn button
6 HORN Wire to horn button
7 - -
8 - -
¼ Note: Use a normally-open horn button.
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