AUTOHELM ST50 Wind Trim User Manual

6
ST50 WindTrim and SpeedTrim Operation and Installation Handbook
ST50 WindTrim and SpeedTrim Operation and Installation Handbook
11
1. Introduction
Congratulations. You are now the owner of an ST50 Trim instrument. The
ST50 Wind trim and ST50 Speed Trim Instruments provide racing crews
with up to the second information on changes in Wind Speed (True or
apparent) and Boat Speed. In addition the WindT rim can also be used as a
steering indicator for wind direction (True or apparent).
Both instruments are repeaters and receive Speed;Wind from the .Sea Talk
bus. Simply lock the instrument onto the current value - shown on the
digital display - and the analogue pointer will indicate changes in that figure
of up to +/-15 %. The locked value can be increased or decreased at any
time using the increment/decrement button.
SeaTalk
extension cable
Cat no. 0131
9m (30ft)
Junction
box
2.6 Ring Connection
® .............-- ®
o
(J/~. ®
\J~J
® ;iif--~--)i·l ®
Installations that have a large number of instruments on the SeaT alk bus
may require a second ring main connection. This should be fed back to the
circuit breaker to avoid excessive voltage drops. This can be checked
using the table below:
SeaTalk Cable
length
Up to 10m (33ft)
Up to 20m (66ft)
Max number of units
(Single connection)
13
7
Max number of units
(Second connection)
26
13
The second connection should be made to the spare lead on the last
instrument and led back to the circuit breaker. If the SeaT alk bus is
receiving power from an autopilot course computer, the second
connection should be made at the spare SeaT alk terminal on the course
computer.

AUTOHELM ST50 Wind Trim Specifications

General

Brand	AUTOHELM
Model	ST50 Wind Trim
Category	Marine Equipment
Language	English