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Installation procedures

851-160572 / B

In the two last telegrams, the ”True” value is used if both true

and magnetic values are transmitted.

Speed data:

nn.n is speed in Nautical miles

kk.k is speed in Kilometer per hour

The speed value should have min. 1, max. 2 digits in front of

comma, and 1 after. Leading zeroes and spaces are accepted.

Connecting the speed log

The Sonar Control Unit can be connected to a speed log with

one of the following outputs (tick off for the type which will be

connected):

• Pulse log (100, 200 or 400 pulses per nautical mile)

• Serial line (RS-232, RS-422 or 20 mA current loop)

The connection of these different speed log outputs is described

in the following chapters.

Connecting a pulse log

The Sonar Control Unit can be connected to a pulse log with one

of the following outputs (tick off for the type which will be

connected):

• 100 pulses per nautical mile

• 200 pulses per nautical mile

• 400 pulses per nautical mile

For any type of log output (relay, open collector, or

opto-coupler), the output must be free from other connections.

6 7 8 9

FEMALE

(CD1873)

1 2 3 4 5

Figure 23 Connections for a

pulse log with relay output

Figure 23 shows the connection of a pulse log with relay output.

For connection of open collector, or opto-coupler outputs, be

aware of the polarization (see figure 24).

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Simrad SP270 Installationshandbuch Seite 81