Power Supply Connections - Raymarine ST60 Tridata Owner's Handbook Manual

Chapter 3: Installation
Cable from Depth transducer
Cable from Speed transducer
Connections to ST60 Tridata instrument

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
Up to 10 m
Up to 20 m
SeaTalk cable
Black
Screen
Blue
No. of instruments
13 maximum
26 maximum
7 maximum
13 maximum
SeaTalk cable
Brown
White
Screen
Green
Red
D4423-1
Power connections
1
2
1
2
25