Specifications

22 ST60 Speed Instrument Owner’s Handbook
Power supply connections
SeaTalk systems
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.
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:
Cable run No. of instruments Power connections
Up to 10 m 13 maximum
26 maximum
1
2
Up to 20 m 7 maximum
13 maximum
1
2
Cable from transducer
White
Brown
Screen
Green
Red
Connections to ST60 Speed instrument
D4370-3
SeaTalk cable
SeaTalk cable