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18 ST40 Depth Instrument Owner’s Handbook
Stand-alone connections
CAUTION
Ensure that the power supply for each stand-alone ST40
instrument is protected by a 3 A fuse or circuit breaker.
3 A circuit breaker
Red +ve
Uninsulated wire (screen) -ve
+
_
D4785-2
Connections to a stand-alone instrument
Cable from
Depth transducer
Screen
Blue
Black
Power cable
Note:
A 3 A fuse can be used in place of
the circuit breaker, if preferred.
12 V dc supply
(e.g. battery)
SeaTalk connections
CAUTION
When instruments are connected to SeaTalk, ensure that the
power supply for the SeaTalk 12 V line is protected by a 5 A fuse
or circuit breaker.
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