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Related Manuals for Simrad RC25
Summary of Contents for Simrad RC25
- Page 1 MANUAL SIMRAD AUTOPILOT Compass 20220653C English...
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- Page 3 Instruction Manual Instruction Manual This manual is intended as a reference guide for choosing the correct type of compass for autopilot installations. It describes the different Fluxgate/Rate compass versions; how to install, connect and calibrate them. Please take time to read the manual. It may give some good hints for your next autopilot installation! 20220653 / Rev.
- Page 4 Simrad AS. The information contained in this document is subject to change without prior notice. Simrad AS shall not be liable for errors contained herein, or for incidental or consequential damages in connection with the furnishing, performance, or use of this document.
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Page 5: Table Of Contents
Contents INTRODUCTION ............5 COMPASS TYPES ............6 Magnetic compass................. 6 Fluxgate compass.................. 6 Rate compass (RC25, RC36, RC37)............. 7 Rate Compass performance diagram ............ 8 Gyro compass..................8 Compass type selection guide............... 9 DESCRIPTION OF MODELS ........10 RFC35 Fluxgate compass ..............10 RFC35N NMEA Compass.............. - Page 6 RFC35NS Compass (NMEA+SIN) as RFC250 substitution ..... 34 Calibration ..................35 COMPASS MODELS, APPLICATION CHART ....36 TECHNICAL SPECIFICATIONS ........37 RFC35 Fluxgate Compass ..............37 RC25 Rate Compass ................38 RC36 Rate Compass ................38 RC37 Rate Compass ................39 RFC35N NMEA Compass..............39 Optional SIN PCB................40 RFC35NS Fluxgate Compass .............
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Page 7: Introduction
Instruction Manual INTRODUCTION The compass or heading sensor is the most vital component in an autopilot system. Therefore, great care should be taken when choosing compass type and finding a good mounting location. Not only should the compass be of good quality, it is even more important that a good mounting location is found. -
Page 8: Compass Types
Simrad Autopilot Compass COMPASS TYPES Magnetic compass The conventional liquid filled magnetic compass with external gimbals is the typical autopilot compass for smaller fishing boats and work boats up to approx. 70ft. The compass card is supported by the fluid and provided it is compensated by qualified personnel, it is a fairly stable and very reliable heading reference for the autopilot, even in rough seas. -
Page 9: Rate Compass (Rc25, Rc36, Rc37)
Rate compass (RC25, RC36, RC37) The Simrad Rate Compass is in principle a combination of a solid state rate sensor and a fluxgate sensor, where the rate sensor is slaved to the fluxgate sensor. -
Page 10: Rate Compass Performance Diagram
Simrad Autopilot Compass Rate Compass performance diagram Measurements made at open sea in a 33-ft. powerboat. The ideal reference shown on the graph is performed by the Robertson SKR-82 Gyrocompass. Time Gyro compass A gyro compass does not use the Earth’s magnetic field to seek North, thus being unaffected by the magnetic conditions onboard. -
Page 11: Compass Type Selection Guide
Instruction Manual The gyrocompass is therefore the perfect heading sensor for autopilots on any type of boat. However, because of the high cost it is mainly used on commercial ships, bigger fishing vessels and mega yachts. Compass type selection guide Boat type Leisure, Leisure;... -
Page 12: Description Of Models
The first RFC35 Fluxgate Compass was made in 1994 for the AP300X series of autopilots. It is today used with all autopilots using ACXX Autopilot Computers and J3XX Junction units. The following Simrad autopilots can use the RFC35 Fluxgate Compass: AP300CX, AP300PX AP300DLX, AP3000, AP3000X, AP11, AP35, AP20, AP22, AP16, AP21, AP25, AP26, AP27, AP50. -
Page 13: Rfc35N Nmea Compass
Instruction Manual Pulse Filter with DECODER Offset conv. Smoothing (0,6 - 0,75) (Gating) adjust Pwr. sec. Supply (Multiplexer) Excitation 2,5 kHz Figure 3-1 RFC35 Block diagram RFC35N NMEA Compass The RFC35N is based on the standard RFC35, with a plug-in NMEA PCB incorporated. -
Page 14: Rfc35Ns Compass (Rfc35N + Sin)
By adding the optional Sin PCB to a RFC35N compass you will get additional analogue Sine/Cosine heading output. The signal is according to the Simrad standard; ±2V with 2.5V reference which makes the compass compatible with the obsolete RFC250 (NMEA + Sin/Cosine output). -
Page 15: Rc37 Rate Compass
RC37 is an excellent heading source for autopilots, chart plotters, radars and other equipment that will benefit from it’s dynamic characteristics. RC37 can be used with the following Simrad autopilots: AP45 (Sine/Cosine), AP9Mk3 (Sine/Cosine or NMEA0183). Explanation to Rate Compass Block diagram Refer to Figure 3-2. - Page 16 Simrad Autopilot Compass 2. When a big course change is made and there is a difference between the integrated Rate heading and the measured Flux heading, the difference will be coupled into the Rate integrator as a bias offset for the Rate heading to make it equal to the Flux heading.
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Page 17: Adding A Sin Pcb To Rfc35N Compass
Instruction Manual Adding a SIN PCB to RFC35N Compass Inserting the PCB Open the compass and insert the SIN PCB into the slots in the housing. SIN PCB Make sure the edge NMEA PCB connector on the SIN ROBNET NMEA EXT.COMP PCB fits into the matching connector... -
Page 18: Location And Installation
Simrad Autopilot Compass LOCATION AND INSTALLATION Inspection of mounting area The area around which the compass will be mounted should be inspected for one or more of the following items: - Vertical or horizontal soft iron rod(s) - Channel or angle iron. -
Page 19: Northerly / Southerly Turning Error
Instruction Manual Then slowly proceed to move the compass in a straight line fore and aft (without turning it!) approximately 30 cm out of the mounting location. Repeat the movement, but this time athwart ship. If at all possible, also move the compass in the vertical plane (up and down). - Page 20 Selecting a compass and autopilot which has been designed especially with the higher speed boats and Northerly turning error in consideration. Keeping boat speed under 15 knots. Simrad’s solution to this problem is to install our RFC35R Rate Compass ! 20220653 / Rev. C...
- Page 21 Instruction Manual * Magnetic dip The Earth’s magnetic field can be decomposed into a horizontal and a vertical component. The horizontal component gives directional information, but the vertical provides no useful heading information. Study the simplified presentation of Earth’s magnetic field on Figure 4-2.
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Page 22: Wiring & Calibration
Simrad Autopilot Compass WIRING & CALIBRATION RFC35 Fluxgate Compass Connection to AP25 series, AP20 series and AP35 autopilots J3XX JUNCTION UNIT ACXX RFC35 AUTOPILOT FLUXGATE COMPUTER COMPASS Figure 5-1 RFC35 wiring ACXX/J3XX RFC35 FLUXGATE MAIN PCB COMPASS Heading Sensor * NON POLARIZED... -
Page 23: Rc25 Rate Compass (Robnet)
RC25 Rate Compass (Robnet) Recommended connection for AP20/21/22, AP300X, AP35 and AP50 RC25 RATE COMPASS Control Unit (AP20) Figure 5-3 RC25 connection to autopilot control unit Recommended connection of RC25 to the autopilot control unit using the Robnet connector. 20220653 / Rev. C... -
Page 24: Alternative Connection To Junction Unit
Simrad Autopilot Compass Alternative connection to junction unit J3XX/J50 JUNCTION UNIT RC25 RATE COMPASS JUNCTION UNIT MAIN PCB TB15 GREY PINK BROWN WHITE Bn Wht Robnet RC25 RATE COMPASS Figure 5-4 Alternative connection to J3XX/J50 Robnet terminal The Robnet connector on the compass cable is removed and the wires are connected in parallel with the ones going to the control unit. -
Page 25: Connection To Ap11
CONNECT! A L T E RN A T I V E C O N N E C T I O N Figure 5-5 RC25 connection to AP11 The Robnet connector on the compass cable is removed and the wires are connected to J3XX Robnet terminal in parallel with the ones going to the control unit or to the spare terminal on the control unit. -
Page 26: Compass Set-Up And Calibration
For AP50: • Select FLUX1 or FLUX2 = Robnet • Select also FLUX1 (or FLUX2) in the User Setup Menu to activate RC25 as Steering compass or Monitor Compass (if more than one compass is connected). Calibration Automatic calibration is activated from the autopilot’s Seatrial menu. -
Page 27: Rc36 Rate Compass (Robnet2)
Instruction Manual RC36 Rate Compass (Robnet2) Connection to AP16, AP25, AP26, AP27 CONTROL UNIT (AP25) RC36 RATE COMPASS Figure 5-6 RC36 connection to autopilot control unit Recommended connection of RC36 to the autopilot Control Unit using the Robnet2 connector. Alternative connection to ACXX Autopilot Computer ACXX AUTOPILOT... -
Page 28: Compass Setup And Calibration
Simrad Autopilot Compass The Robnet2 connector on the compass cable is removed and the wires are connected in parallel with the ones going to the Control Unit. Compass setup and calibration The AP25 series autopilots (including AP16) has automatic interface (source) setup that detects the connected compass and other connected sources. -
Page 29: Compass Calibration
2. Do not use the calibration procedure when the IS15 is connected to a Simrad autopilot. Before you begin the compass calibration, make sure you have enough open water around you to make a full clockwise turn at low speed. -
Page 30: Connection To Other Equipment
Simrad Autopilot Compass Connection to other equipment RFC35N NMEA PCB ROBNET NMEA EXT.COMP GREY SUPPLY (From circuit breaker or via a separate switch) PINK +12/24V GREEN NMEA IN (CALIBRATION) YELLOW BROWN NMEA OUT (HEADING) WHITE Figure 5-10 RFC35N Connection to other equipment Cable color code * RX+ (Yellow) and RX–... - Page 31 Instruction Manual • Make two 360 degrees turns to starboard within 5 minutes from turn on. Make sure the boat passes 3 times through North (see figure) in smooth and slow turns. A minimum of roll and acceleration will give the best result. •...
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Page 32: Rfc35N Connection For 10Hz Nmea Output Rate
Simrad Autopilot Compass RFC35N connection for 10Hz NMEA output rate If the NMEA heading with 10Hz output rate is needed from a RFC35N that is used in an X-series autopilot installation the wiring will have to be as shown below:... -
Page 33: Rfc35N As Rfc300 Substitution
Instruction Manual As RFC35N can not output Robnet and NMEA at the same time, Note 1. the connection to the autopilot has to be made by the 2-wire p.w.m. signal (as for standard RFC35). Note 2. RX+ (Yellow) and RX– (Green) are only used if the NMEA equipment can send the proprietary sentences for calibration and offset as described in Technical specifications, section 7.5 Calibration... - Page 34 Simrad Autopilot Compass NMEA PCB ROBNET NMEA EXT.COMP MICRO-CONTROLLER Colour code in brackets ( ) is for moulded type connector only. Removable connector Moulded connector Solder type Figure 5-12 RFC35N as RFC300 substitution Calibration Automatic calibration is activated from AP300 “Seatrial” menu and RFC35N needs only 1¼...
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Page 35: Rc37 Rate Compass
Instruction Manual RC37 Rate Compass Connection to AP45 and AP9MK3 RC37 RATE AP45 COMPASS Figure 5-13 RC37 connection to AP45/AP9MK3 Figure 5-14 RC37 wiring to AP45 and AP9Mk3 20220653 / Rev. C... -
Page 36: Rfc35Ns Compass (Nmea+Sin) As Rfc250 Substitution
20183554). The optional SIN PCB added to the RFC35N compass provides analogue Sine/Cosine heading output. The signal is according to the Simrad standard; ±2V with 2.5V reference that makes the compass compatible with RFC250 (NMEA+Sine/Cosine output). The compass can then be used with the following Simrad/ Robertson autopilots: AP100, AP1000, AP2500, AP200 series, AP40, AP45 and AP9MKII/3. -
Page 37: Calibration
Instruction Manual SIN PCB NMEA/RATE PCB ROBNET NMEA EXT.COMP 5 4 3 0,5 m Cable 22083661 Original RFC250 cable (Part no. 20183554) RFC35NS Figure 5-16 RFC35NS as RFC250 substitution; internal connections Note ! The optional SIN PCB can not be used with a standard RFC35 - only with RFC35N (or RFC35R). -
Page 38: Compass Models, Application Chart
Simrad Autopilot Compass COMPASS MODELS, APPLICATION CHART Autopilot AP50 (J50) AP25, 26, 27, AP20, 21, 22, AP300X AP300 Dataline AP45 AP9Mk3 model AP16 (AC20) AP11, AP35, (J300X) (J300) Pilot Compass (J300X) (J3000) RFC35 2-wire pwm 2-wire pwm 2-wire pwm 2-wire pwm n.a. -
Page 39: Technical Specifications
Instruction Manual TECHNICAL SPECIFICATIONS RFC35 Fluxgate Compass Dimensions: ....................See Figure 7-1 Weight: ....................... 0,9 kg (2,0 lbs) Supply and output:..........Polarity independent 2-wire supply with superimposed pulse width modulation Automatic Performance: Calibration: ............Automatically activated by control head Gain compensation: ..........Automatically adjusted continuously Repeatability:.................... -
Page 40: Rc25 Rate Compass
Simrad Autopilot Compass RC25 Rate Compass Dimensions: ....................See Figure 7-1 Weight: ...................... 0.9 kg (2.0 lbs.) Power consumption: ..................... 0.9 watts Supply and interface: ....................Robnet Environmental Protection:................... IP56 Material: ....................White/black ABS Temperature range: Operation:..............0 to +55°C (+32 to + 130°F) Storage: .............. -
Page 41: Rc37 Rate Compass
Material: ......................Black ABS RFC35N NMEA Compass Dimensions: ....................See Figure 7-1 Supply:....................10-29VDC, 1 watt Heading output: ......................Serial Output format: ..........Serial, RobnetTM bus for Simrad autopilots or NMEA 0183 10x/sec. NMEA heading:..............$IIHDM,x.x,M*hh<cr><lf> x.x=heading, hh=checksum NMEA status: * ..........$PSTOK,R<cr><lf>Calibration running $PSTOK,C<cr><lf>Calibration terminated, or not... -
Page 42: Optional Sin Pcb
Simrad Autopilot Compass NMEA0183 input data: Calibration start command: ..............$PSTOC<cr><lf> Heading offset adjust:..............$PSTOK,,,nnn,<cr><lf> nnn = offset adjust angle 0 – 360 degree. PSTOK and PSTOC are proprietary NMEA sentences. Accuracy:..............<1.25 degrees rms (after calibration) Repeatability:................... <0.2 degrees rms Calibration: ......................Automatic... - Page 43 Instruction Manual Accuracy:..............<1.25 degrees rms (after calibration) Repeatability:................... <0.2 degrees rms Calibration: ......................Automatic Roll/Pitch:....................... ± 35 degrees Cable supplied: ..........0.3 m (1 ft) with 7-pin Viking connector Temperature range: Operation:..............0 to +55 °C (+32 to + 130 °F) Storage: ..............–30 to +70 °C (–22 to +158 °F) Environmental Protection:...................
- Page 44 Simrad Autopilot Compass 20220653 / Rev. C...
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