background image

9  |  Introduction

III Introduction

The Rudder Feedback Unit can be used in a rudder angle indicator system and as a part of the control loop in a steering
control system. There are two types of Rudder Feedback Units available: Rudder Feedback Unit MD and Rudder
Feedback Unit HD.

The Rudder Feedback Unit contains a potentiometer which is proportional to the rudder angle. The output can be
connected to an Analog Interface Mk.2. The Rudder Feedback Unit can be mechanically coupled to the rudder post via a
RFU Chain Transmission or a RFU Linkage Transmission.

Summary of Contents for Alphatron Marine Rudder Feedback Unit HD

Page 1: ...Rudder Feedback Unit MD HD Installation and Operation Manual www jrc am ...

Page 2: ... 6 Grounding Modules 18 2 Operation 19 I Operating the Rudder Feedback Unit 19 3 Maintenance 21 3 1 Rudder Feedback Unit Maintenance 21 3 1 1 RFU Chain Transmission Maintenance 21 3 1 2 RFU Linkage Transmission Maintenance 21 4 Appendix A 22 4 1 Specifications 22 4 1 1 Specifications Rudder Feedback Unit MD HD 22 4 2 Mechanical Drawings 23 4 2 1 Mechanical Drawing Rudder Feedback Unit MD 23 4 2 2 ...

Page 3: ...1 Thales Certificate Rudder Feedback Unit MD 30 4 4 2 Thales Certificate Rudder Feedback Unit HD 31 5 Appendix B 32 5 1 ISO 9001 Certificate Alphatron Marine R D 32 6 Appendix C 33 6 1 EC Declaration of Conformity 33 ...

Page 4: ...ransmits data This is usually called transmitter or TX Listener Device which receives data This is usually called receiver or RX ISO GND Isolated Ground This is a ground connection to be used for reference signal It is differ ent from EARTH and should normally not be connected to EARTH Grounding point stud Point on the chassis of the AlphaLine instrument which should be connected to the ship s mas...

Page 5: ...ances to equipment that will not cause an unacceptable deviation of the ship s standard and steering compasses Table 1 Definitions I 2 2 Abbreviations Abbreviations as used in this manual are explained in Table 2 Abbreviations on page 5 A Ampere ARD AlphaLine Repeater Display CAN Controller Area Network CT Chain Transmission DC Direct Current DP Dynamic Position ECDIS Electronic Chart Display Info...

Page 6: ...s Alternating Current VDC Volts Direct Current VDR Voyage Data Recorder W Watt Table 2 Abbreviations I 3 Norms and Standards The complies with the applicable standards norms and regulations IEC 60945 2002 including IEC 60945 Corrigendum 1 2008 Standard DNV 2 4 IEC 61162 series ...

Page 7: ...ent is generating any smoke or odor or is overheated Immediately inform your local service agent of the symptom to have it repaired Prolonged equipment operation under such a condition can cause a fire or electric shock WARNING Do not place a vessel containing liquid on the equipment It may cause a fire electrical shock or a failure to the equipment if knocked over WARNING The axle of the Rudder F...

Page 8: ...ill void the warranty CAUTION When cleaning the surface do not use any organic solvent such as thinner or benzine Otherwise the paint and markings on the surface may get damaged For cleaning the surface remove the dust and debris and wipe with a clean dry cloth II 1 Warranty Non compliance with the installation operation and maintenance requirements may void the warranty Read Warnings and Cautions...

Page 9: ...e two types of Rudder Feedback Units available Rudder Feedback Unit MD and Rudder Feedback Unit HD The Rudder Feedback Unit contains a potentiometer which is proportional to the rudder angle The output can be connected to an Analog Interface Mk 2 The Rudder Feedback Unit can be mechanically coupled to the rudder post via a RFU Chain Transmission or a RFU Linkage Transmission ...

Page 10: ...nit should be installed so that the Linkage Transmission or the Chain Transmission is exactly horizontal The horizontal distance between the rudder center and the center of the Rudder Feedback Unit should be between 400 to 800 mm see Figure 1 RFU Linkage Transmission Installation on page 10 and Figure 2 RFU Chain Transmission Installation on page 10 Figure 1 RFU Linkage Transmission Installation F...

Page 11: ...is part is yard delivery The yard should determine the proper length and weld one nut with left threat to one side and one nut with right threat on the other side When the Linkage Transmission is used the angle of the rods should be exactly 90 degrees at a rudder angle of 0 degrees The distance d2 from the center of the rudder to the ball and socket joint should be exactly the same as the distance...

Page 12: ...n is delivered complete with a sprocket with 25 teeth Rudder Feedback Unit side and a sprocket with 28 teeth rudder side and parts to create the appropriate tension When the Chain Transmission is used the Rudder Feedback Unit can be placed in any direction compared to the rudder as long as it is easy accessible for installation and maintenance ...

Page 13: ...part The short part has to be installed at the side of the Rudder Feedback Unit The long part can be shortened by removing links to create the desired length The tension of the chain can be changed by rotating the stud bolt 5 with left and right thread see Figure 7 Stud Bolt on page 13 Figure 7 Stud Bolt The proper tension 100 N is reached when compression spring 6 is almost completely compressed ...

Page 14: ...age 16 For electric connections see Figure 19 Connection Diagram Rudder Feedback Unit MD on page 28 and Figure 20 Connection Diagram Rudder Feedback Unit HD on page 29 1 1 4 1 Opening Rudder Feedback Unit MD The Rudder Feedback Unit MD needs to be opened to connect the wires 1 Remove the four outer screws on top of the Rudder Feedback Unit MD see Figure 9 Rudder Feedback Unit MD Four Outer Screws ...

Page 15: ...ccording to Figure 19 Connection Diagram Rudder Feedback Unit MD on page 28 Figure 11 Rudder Feedback Unit MD Electric Connections When the connections have been made replace the connectors and close the Rudder Feedback Unit MD Pay attention to the O ring The red zero position marking should be in the opposite direction of the earth stud To close the Rudder Feedback Unit MD tighten the 4 bolts wit...

Page 16: ...n the equipment connected to the Rudder Feedback Unit MD 1 1 4 2 Opening Rudder Feedback Unit HD The Rudder Feedback Unit HD needs to be opened to connect the wires 1 Remove the 10 screws of the front hatch see Figure 12 Rudder Feedback Unit HD Ten Front Hatch Screws on page 16 INFO Figure 12 Rudder Feedback Unit HD Ten Front Hatch Screws 2 Remove the front hatch of the Rudder Feedback Unit HD The...

Page 17: ...After this all other screws can be replaced and torqued to 6 5 Nm 1 1 4 2 1 Adjusting Limit Switches and Potentiometers Adjusting the Limit Switches When adjustment of the limit switches of the Rudder Feedback Unit HD is needed use an Allen key to loosen the corresponding cam and adjust it After adjustment tighten the screw again to secure it See Figure 14 Rudder Feedback Unit HD Limit Switches on...

Page 18: ...nt is to be made this has to be done in the equipment connected to the Rudder Feedback Unit HD 1 1 5 Cable Use the following connection cables Name Specification Shield Y N Norm Potentiometer signal 3 x 1 5 mm 2 Y Limit switches 4 x 1 5 mm 2 Y Table 3 Connection Cables 1 1 6 Grounding Modules To function properly the Rudder Feedback Unit must be grounded to the ship s mass For this purpose the Rud...

Page 19: ...e rudder feedback axle It is up to third party systems to use the contact of the limit switch for controlling the rudder RFU Chain Transmission The principle of the RFU Chain Transmission is quite straight forward The Rudder Feedback Unit and the rudder are connected via a chain The movement turning of the rudder is transferred to the Rudder Feedback Unit via the chain The potentiometer of the Rud...

Page 20: ...dder Feedback Unit can turn is measured from the zero position marking The zero position marking is listed as a red dot on the top of the Rudder Feedback Unit When the axle is aligned with the zero position marking the axle is able to rotate 135 degrees both ways Note WARNING The maximum angle 135 degrees of the Rudder Feedback Unit may not be exceeded since this will compromise the accuracy of th...

Page 21: ...ver Yearly maintenance tasks 1 Check if the mounting bolts of the Rudder Feedback Unit are still properly fastened 2 Check if the screws of the feedback sprocket i e the screws that fasten the sprocket to the axle are properly fastened INFO If the screws are loose apply new Loctite 243 before fastening the screws 3 Check if the screws of the rudder sprocket i e the screws that fasten the sprocket ...

Page 22: ...ty Up to 95 at 40 C Storage temperature 25 C to 70 C Storage humidity Up to 95 at 40 C IP rating IP56 Compass safe distance Std 10 cm Steering 10 cm Environmental according to DNV 2 4 table 2 1 Temperature Class D Humidity Class B Vibration Class A EMC compatibility Class B Enclosure Class C Analog Signals Potentiometer 1 2 kOhm 3 wire Potentiometer 2 2 kOhm 3 wire Analog Contacts HD version only ...

Page 23: ...23 Appendix A 4 2 Mechanical Drawings 4 2 1 Mechanical Drawing Rudder Feedback Unit MD Figure 15 Mechanical Drawing Rudder Feedback Unit MD ...

Page 24: ...24 Appendix A 4 2 2 Mechanical Drawing Rudder Feedback Unit HD Figure 16 Mechanical Drawing Rudder Feedback Unit HD ...

Page 25: ...25 Appendix A 4 2 3 Mechanical Drawing RFU Linkage Transmission Figure 17 Mechanical Drawing RFU Linkage Transmission ...

Page 26: ...26 Appendix A 4 2 4 Mechanical Drawing RFU Chain Transmission Figure 18 Mechanical Drawing RFU Chain Transmission ...

Page 27: ...27 Appendix A 4 3 Electric Diagrams The cable diagrams and connection diagrams illustrate the connections to hardware power and other equipment ...

Page 28: ...28 Appendix A 4 3 1 Connection Diagram Rudder Feedback Unit MD Figure 19 Connection Diagram Rudder Feedback Unit MD ...

Page 29: ...29 Appendix A 4 3 2 Connection Diagram Rudder Feedback Unit HD Figure 20 Connection Diagram Rudder Feedback Unit HD ...

Page 30: ...30 Appendix A 4 4 Thales Certificates 4 4 1 Thales Certificate Rudder Feedback Unit MD Figure 21 Thales Certificate Rudder Feedback Unit MD ...

Page 31: ...31 Appendix A 4 4 2 Thales Certificate Rudder Feedback Unit HD Figure 22 Thales Certificate Rudder Feedback Unit HD ...

Page 32: ...32 Appendix B 5 Appendix B 5 1 ISO 9001 Certificate Alphatron Marine R D Figure 23 ISO 9001 Certificate Alphatron Marine R D ...

Page 33: ...33 Appendix C 6 Appendix C 6 1 EC Declaration of Conformity Figure 24 EC Declaration of Conformity Rudder Feedback Unit MD HD ...

Page 34: ...ct to change without notice and does not represent a commitment on the part of Alphatron Marine B V T 31 10 453 4000 Document Installation and Operation Manual F 31 10 453 4010 Project no Rudder Feedback Unit MD HD service alphatronmarine com Version V1 0 www jrc am All rights reserved Alphatron Marine B V Centers of Excellence Houston Rotterdam Singapore Tokyo ...

Reviews: