Ap50 control unit, Junction units, Rudder feedback units – Simrad AUTOPILOT SYSTEM AP50 User Manual
Page 16: Rf300s rudder feedback unit, 4 ap50 control unit 1.5 junction, Units, 6 rudder feedback units, 4 ap50 control unit, 5 junction units

Simrad AP50 Autopilot
14
20221032B
1.4 AP50 Control Unit
This compact autopilot control for panel, bulkhead- or bracket-
mounting has a rotary course knob and a large LCD for readout
of autopilot data. It also has two RobNet connectors for system
interconnection and expansion.
1.5 Junction Units
The junction unit in the AP50 autopilot system contains the
steering computer, interface circuits to all system components,
and drive circuits for the drive unit motor and clutch. Two
models, J50 and J50-40, are available.
J50
J50-40
Supply voltage
10-40 V
10-40 V
Motor current (continuous/peak) 10/20A 20/40A
Number of RobNet units* (+J50)
15
15
NMEA ports (input/output)
2
2
Solenoid output
Yes
Yes
Galvanic insulated solenoids
Yes
No
Input for NFU control
Yes
Yes
External alarm
Yes
Yes
Radar clock/data interface
Yes
Yes
* AP50 Control Unit, AP51 Remote Control, RFC35R Rate
Compass, FU50 Follow-up lever, CI300X Compass Interface,
NI300X NMEA Interface, TI50 Thruster Interface, AD50
Analog Drive.
Table 1-1 Junction Unit Model Comparison
1.6 Rudder Feedback Units
RF300S Rudder Feedback Unit
This rudder feedback unit with transmission link and 10 m (30
feet) of cable transforms the angular travel of the rudder to a
digital signal read by the autopilot steering computer. It is to be
used on small to medium size vessels.