Simrad RF40 Manuale utente

| 1

RF40 Rudder Feedback unit

Installation guide

The RF40 is a resistive rudder feedback unit, suitable for autopilot systems with a

NAC-1 or NAC-2 autopilot computer.

¼Note: The RF40 can not be used with the NAC-3 autopilot computer.

The RF40 might also be used with autopilot computers that have analog rudder

feedback input.

¼Note: Do not remove the transmitter lever from the feedback unit.

¼Note: The unit is factory adjusted and requires no further adjustment at

installation than described below.

Mounting location

The RF40 unit (A) mounts close to the rudder, and is mechanically linked to the

rudder tiller arm (B) or rudder quadrant.

Select a mounting location for the RF40 unit according to the illustration

• X1 = X2: min 150 mm (5.9”), max 345 mm (13.6”)

• Y1 = Y2: min 44 mm (1.7”), max 130 mm (5.1”)

Y1 Y2

X1 = X2

Y1 = Y2

2 |

Installation

The RF40 lever (C) has two slots for the transmitter link (D). The slots enable

maximum exibility to provide the 1:1 mechanical linkage relationship.

Y1 Y2

1. Turn the helm to set the rudder tiller arm (B) to approximate center position

2. Mount the RF40 unit to a suitable platform

• If required:

-add blocking material under the RF40 to adjust the height of the

transmitter lever to be level with the rudder tiller arm

-cut the length of the transmitter rod (D) to move the feedback unit closer

to the rudder post

3. Rotate the RF40 lever to center position

• the marks (E) on unit and on the lever should be aligned

4. Rotate the RF40 unit so that the rudder lever is parallel with the rudder tiller arm

5. Set the transmitter link to the inner limit of the outer slot if possible

6. Drill and tap the rudder tiller arm so that the Y2 dimension is equal to the Y1

dimension

7. Attach the ball joint to the tiller arm, and connect the transmitter rod to the ball

joint at the rudder tiller arm

8. Tighten the mounting screws for both the RF40 and the transmitter rod ball

joint.

9. Observe the feedback unit while someone turns the helm through the complete

rudder travel hard-over to hard-over, and verify that the mechanical linkage

moves freely.

| 3

Wiring

The RF40 is equipped with a 15 m (49 feet) cable with connector (A). The unit

connects to the NAC-1/NAC-2 autopilot computer’s three pins rudder feedback

socket (B).

A B

1 2

Function Color

1+5 V DC Red

2Signal Yellow

3-0 V DC Black

Dimensional drawings

RF40

177 mm (6.97”)

55 mm

(2.16”)

99 mm (3.90”)

65 mm

(2.56”)

Transmitter link

345 mm (13.6”)

4 |

Spare part

20193454 Transmitter link

Technical specications

¼Note: The most up-to-date specications list is available at

www.simrad-yachting.com

Physical

Dimensions See gure

Weight 0.5 kg (1.1 lbs.)

Material Arnite T06 200 PBT

Compass safe distance 1.0 m (3.1 ft.)

Mounting Horizontal, vertical or upside down

Cable 15 m (49 feet) with connector

Transmitter link Stainless 345 mm (13.6”) with 2 ball joints

Electrical

Supply voltage 5 V DC

Power consumption 2.5 mW

Environmental

Operating temperature -25 to +55 °C (–13 to +130 °F)

Storage temperature -30 to +70 °C (–22 to + 158 °F)

Waterproof rating IP56

Interface

Rudder angle +/-120 degrees

Output signal 0 - 5 V DC

Resistance value 10 K ohms

Accuracy +/-0.25° within +/-5°, otherwise +/-0.5°

Repeatability +/-0.1°

*988-12045-001*

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