Simrad Simrad SP70, Installation Manual

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Simrad SP70
78
851-164336 / D
8.2 Speed log connection
Overview
The sonar can read the speed information from one of the
following three sources (tick off for the type which will be
connected):
•
Pulse log (200 pulses/nautical mile)
•
Speed log with RS-232 serial line output
•
(D)GPS serial line (RS-232)
The connection of these different sources are described in the
following chapters.
Pulse log (200 pulses/nautical mile)
For any type of pulse log output (relay, open collector, or
opto-coupler), the output must be free from other connections.
The figure to the left shows the connection of a pulse log with relay
output to terminal TB8 in the Sonar Interface Unit.
For connection of a pulse log with open collector or opto-coupler
output, the connection must be made between
SP.LOG+ (on
TB8-2) and SP.LOG- (on TB8-5). If this is the case, be aware of
the polarization.
GROUND
12
2
5
BAV99
D11
(C
D701
6)
100k
100k
10k 100k
10k
+12V
R31
R32
10
11
IN-
IN+
12
13
3
R33
1k
TP33
+12V +5V
LM339
R66
R65
R64
SP.LOG+
SP.LOG-
TB8
IC30
TP34
Figure 28 Pulse log interface
Figure 27
Connections for
pulse log with
relay output
6
2
1
8
11
4
7
10
3
9
12
5
Sonar Interface
Unit TB8
Speed log +
Speed log -
Ground
(CD70
15)