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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

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.

Simrad RS90S User Manual

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