22 ST60+ Compass Instrument Owner’s Handbook
Power supply connections
SeaTalk systems
Ensure that the power supply for the SeaTalk bus is protected by a 5 A fuse or
circuit breaker.
Systems with a large number of instruments on the SeaTalk bus may require
connections to the power supply from each end of the system (‘ring-main’ style),
to maintain sufficient voltage throughout the system.
This requirement depends on the total length of the cable run and the total
number of instruments in the system, as follows:
Stand alone instruments
Stand-alone instruments are not connected to SeaTalk and therefore need to be
connected to an alternative 12 V power source. Power cables are available in 2 m
and 9 m lengths.
CAUTION: Protect the power supply
Ensure that the 12 V power supply for the instrument is
protected by a suitably rated fuse or protective circuit breaker.
Cable run No. of instruments Power connections
Up to 10 m 13 maximum 1
26 maximum 2
Up to 20 m 7 maximum 1
13 maximum 2
D4311-1
5 A fused,
12 V dc supply
(typically provided
by autopilot)
Red
Screen
Red
Screen
1234
Instruments
5 to 16
17
18
19
20
SeaTalk power connections
81265_1.book Page 22 Monday, December 5, 2005 9:23 AM
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