Seiwa SW AP03 - Manual (Page 34)

BROWN
ORANGE
BLUE
BROWN
ORANGE RUDDER
TRANSDUCER
CABLE
SCREEN
ALARM
SCREEN
BLUE
METER
Figure 3.7. Rudder transducer connections.
When carrying out the setup procedure (Sec 2.2) at a later stage, it may be
necessary to adjust the zero position of the transducer. To do this, loosen the clamp
holding the transducer arm. Very slowly rotate the shaft with a screwdriver until the
reading is correct. A small turn of the shaft makes a big difference to the centre.
3.5 ATTACHMENTS
3.5.1 REMOTE ALARM
A piezoelectric beeper is available which repeats the internal alarm and key beeps of
the Controller. This two-wire unit is connected between the ALARM (positive) and GREEN
(negative) terminals of the Rudder Transducer socket. Any beeper may be used which is
compatible with the drive available of 35mA (max) at 10.5V dc.
3.5.1 NMEA INTERFACES
The Junction Box has two NMEA input ports for navigation, wind and heading data.
There is also one output port for heading data. Both input ports are sampled continuously so
that a given cable can be connected to either. But two cables must not be connected in
parallel to one input. The Port A socket is shown in Fig 3.10, while the Port B input, which is
shared with the gyro, was shown in Fig 3.4
N/C
OUT +
INPUT -
OUT -
SCREEN
CABLE
INPUT +
SCREEN
NMEA
PORT A
DATA
Figure 3.10 NMEA data cable connections.
The correct polarities are such that when the external NMEA system is transmitting, the
wire that goes positive is connected to the + terminal of the input pair.
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