Simrad RF25 User manual

Instructions
RF25 Rudder Feedback (P/N 22014302)
GENERAL
The RF25 is designed for connection to the
SimNet network. It is equipped with
transmission link and 5 m (16 feet) of SimNet
cable with connector. It transforms the
angular travel of the rudder to a digital signal
read by the autopilot steering computer. The
RF25 transmits the rudder angle even if the
autopilot is switched off.
INSTALLATION
The RF25 Rudder feedback unit mounts close
to the rudder, and is mechanically linked to
the rudder tiller arm or rudder quadrant. Refer
to the figure below for recommended
mounting arrangement.
Do not remove the transmitter lever from the
feedback unit. The unit is factory adjusted and
need no further adjustment at installation than
described below.
Turn the helm to set the rudder tiller arm to
approximate centre position.
Set the mounting location to be in accordance
with the figure. The centre of the feedback
unit should be in line with the centre of the
rudder post. Mount the feedback unit to a
suitable platform using the screws provided. If
necessary, add blocking material under the
feedback unit to adjust the height of the
transmitter lever to be level with the rudder
tiller arm.
Due to space limitations, it may be necessary
to cut the length of the transmitter rod to
move the feedback unit closer to the rudder
post.
Rotate the feedback transmitter lever to
centre position. (Use the alignment mark to
line up the transmitter lever to be opposite the
cable entry into the feedback.)
Carefully observe the alignment marks. A
rudder feedback alarm may be the result if the
alignment instructions are neglected.
Note that the transmitter lever has two slots
for the transmitter link. The slots enable
maximum flexibility to provide the 1:1
mechanical linkage relationship. As a starting
point, set the transmitter rod to the inner limit
of the outer slot if possible. Drill and tap the
rudder tiller arm so that the Y1 dimension is
equal to the Y2 dimension (Use 4.2 mm drill
and 5 mm tap). Attach the ball joint to the
tiller arm, and connect the transmitter rod to
the ball joint at the rudder tiller arm.
Tighten the mounting screws for both the
feedback unit and the transmitter rod ball
joint.
Observe the feedback unit while someone
turns the helm wheel through the complete
rudder travel H.O. to H.O. and verify that the
mechanical linkage moves freely.

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ELECTRICAL CONNECTION
RF25 Rudder Feedback Unit
8-16V SimNet supply SimNet
T-joiner
SimNet backbone
SimNet drop cable
RF25 connection to SimNet
TECHNICAL SPECIFICATIONS
Dimensions:...................See figure
Weight:.........................0,5 kg (1,1 lbs)
Material: .......................Arnite T06 200 PBT
Environmental Protection: IP56
Safe distance to compass: 1,0 m (3,1 ft.)
Temperature range:
Operation:..............–25 to +55 °C
(–13 to +130 °F)
Storage:.................–30 to +70 °C
(–22 to + 158 °F)
Mounting: .....................Horizontal, vertical,
or upside down
Supply and interface: ......8-16V via SimNet
Power consumption:........0,4W
SimNet Network load factor (NL): 1
SimNet ports (input/output): 1
Cable supplied:...............5 m (16’) SimNet
cable with connector
Rudder angle: ................±120 degrees
Output signal: ................SimNet/NMEA2000
PGN127245
Accuracy: ......................±0.25° within ±5°,
otherwise ±0.5°
Repeatability:.................±0.1°
NMEA compliant
Transmitter link:.............Stainless 345 mm
(13.6") with 2 ball
joints.
Ball joint stud for rudder arm requires 4.2 mm
diameter hole and 5 mm tap.
SPARE PARTS
22014286 RF25 Rudder Feedback
w/accessories
20193454 Transmitter link
44133122 Transmitter rod
M5x325mm
20193624 Ball joint Ass'y (2)
RF25 Dimensions
Transmitter Link – dimensions
20222552 / A