RF14XU Rudder Feedback Unit
The rudder feedback unit transmits a signal proportional to the rudder angle. It is mounted close to the rudder stock and is mechanically connected to the rudder by a transmission link in a 1:1 ratio.
The RF14XU Rudder Feedback Unit consists of a glassreinforced non-flammable polyester housing with a mounting plate of sea-water resistant aluminium. It contains a potentiometer, limit switches and an electronic drive module. The electronic drive module contains a voltage section and a frequency section.
The voltage section outputs a voltage to the rudder angle indicator(s) which is proportional to the rudder angle. The voltage varies ±9 volts around half the supply voltage.
The frequency section generates a variable frequency signal with 3400 Hz as midposition reference. This section is only used if a Simrad autopilot is connected to RF14XU. The signal varies at a rate of 20 Hz/degree, increasing when the rudder moves to port and vice versa. The shaft of the Feedback Unit is free to travel 360 degrees, but only ±90 degrees from midposition are used for signal control. RF14XU is equipped with two sets of micro switches, which can be used as electrical limit switches for the steering gear.
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