
Simrad SP270
34
851-160572 / B
1 Set the switch S101 at the rear panel on the Sonar Control
Unit to OFF position. For location of the switch, refer to
figure 14.
2 Disconnect all connections to the rear panel on the Sonar
Control Unit.
3 Use the 3mm Allen key to unscrew the four screws on the
front of the operator panel, and pull the electronic drawer
carefully out. Note the two cables to the display on the top
of the drawer unit.
4 Disconnect the two display cable plugs on the drawer unit,
and dismount the top cover of the drawer.
5 Locate the DIL switch S2 (refer to figure 20), and set the
switches according to the table below.
6 If the output voltage is only half-wave rectified, refer to
figure 20, and set the links LK19 LK20 and LK21 to
position A.
Gyro
DILswitchS2
1 2 3 4 5 6 7 8
Synchro 1:360
+REF On Off Off Off Off Off Off Off
-- R E F On On Off Off Off Off Off Off
1:180
+REF On Off Off On Off Off Off Off
-- R E F On On Off On Off Off Off Off
1:90
+REF On Off Off Off On Off Off Off
-- R E F On On Off Off On Off Off Off
1:36
+REF On Off Off On On Off Off Off
-- R E F On On Off On On Off Off Off
7Donotinsert the Control Unit drawer until mentioned in a
later chapter.
Course gyro with serial line output
The Sonar Control Unit can read the course gyro data (and/or
the speed log data) from a serial line with on of the following
outputs (tick off for the type which will be connected):
• RS-232 Serial line
• RS-422 Serial line
• 20 mA current loop
The format of the serial line data is standard NMEA 0183, and
the telegram can contain both the course and speed data (refer to
the telegram format in the end of this chapter).
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