Installation manual

Simrad SD570 / Base version
40
851--160116 / B
S
P
E
E
D
DIL SWITCH S1
S
P
E
E
D
1 2 3 4 5 6 7 8
100 pulses per nautical
mile
OFF OFF ON OFF OFF OFF OFF OFF
200 pulses per nautical
mile
OFF OFF OFF ON OFF OFF OFF OFF
400 pulses per nautical
mile
OFF OFF ON ON OFF OFF OFF OFF
Do not insert the Control drawer unit before mentioned in a later
chapter.
Figure 23 shows the pulse log interface circuit on the Control Unit
Board.
Figure 23 - Pulse log interface
When the system is started up, an oscilloscope can be connected
to the test point TP5 to check if the pulse log signal is coming
through the comparator U45 (TP4 is GND). If the signal is not
coming through the comparator, try to adjust the 10- turn
potmeter R45. In case of noise problems, R45 can be adjusted for
noise limitation .
Connecting a speed log with serial line output
The Sonar Control Unit can read the speed log data (and/or the
course gyro data) from a serial line with on of the following
outputs (tick off for the type which will be connected):
j RS232 serial line
j RS422 serial line
j 20mA 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 chapter 7.2.3).