Kongsberg SIMRAD RF45X Manual

Simrad RF45X Rudder Feedback Unit
Valid for RF45X with code FA onwards
The RF45X is a medium duty rudder feedback unit. Mechanically it is identical to it's
predecessor RF45, therefore it is a repairable rather than a potted throw away item.
Electrically it outputs a frequency (pulse width modulated) signal that matches with
the ACXX/J3XX/J50 input (AP25/AP20/AP35/AP50), and also with AP45 and AP9
Mk3. The RF45X can also operate on 24V DC, a useful feature when connected in a
stand alone rudder angle indicator system.
Connection to AP45 Autopilot
Refer to the AP45 manual for mounting and connection details.
Connection to ACXX/J3XX/J50 junction units
Mounting
The RF45X is normally installed with the shaft pointing upwards. It can, however, be
mounted with the shaft pointing downwards if this is more convenient. The deflection
can then be inverted as illustrated in Figure 2. An "upside-down" installation will make
access to within the unit more convenient as the unit can be opened without moving it
from the mounting base. To open the unit, unscrew the two screws at the bottom and
remove the cover. Be careful with the wires when you put back the cover.
Use the attached template (Figure 3) to drill the required mounting holes. The unit is
secured to the mounting base by the two enclosed Allen screws. (Other types of screws
may be used when it is secured
to e.g. a wooden base.)
Make the parallelogram
configuration of the trans-
mission link (see Figure 1)
with the rudder amidships and
temporarily fasten the link to
the RF45X shaft. The trans-
mission rod can be shortened
by cutting off a piece using a
hacksaw. Move the rudder
manually h.o. - h.o. and make
sure the transmission link is
moving freely in both
directions.
Figure 1 RF45X Rudder
Feedback Unit - Mounting
Page 1 of 3
P/N 20220612D 30.06.05