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Installation | RS90S User 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
¼ Notes:
• You can connect a (minimum) 4W,8 Ω or an 8W,4 Ω speaker to
each pair of speaker terminals.
• Speakers are supplied pre-terminated with 5 m twin-core cable
(red/black).
Connector 8 - GPS Input - NMEA 0183 (4800 bps),
and Horn button connections
Number Label Description
1
RX GPS+ NMEA 0183 Input+
Balanced, RS-422, GPS data input
2 RX GPS- NMEA 0183 Input-
Balanced, RS-422, GPS data input
3 TX GPSO NMEA 0183 Output+
Connect to ship’s NMEA 0183 input
4 GND NMEA 0183 Output-
Single end, GND
5 GND Wire to horn button
6 HORN Wire to horn button
7 - Not connected
8 - Not connected
¼ Notes:
• Use a normally-open horn button.
• A GPS source is required to enable full functionality of DSC
calling, especially DISTRESS calls.
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