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Installation manual
Simrad AP24/AP28 Autopilots with
AC12/AC42 Autopilot Computers
English
Installation manual
Simrad AP24/AP28 Autopilots with
AC12/AC42 Autopilot Computers
English
Document no: 20222568
Revision: D
Date: January 2009
The original language for this document is English. In the
event of any discrepancy between translated versions
and the English version of this document, the English
document will be the official version.
To the best of our knowledge, the content in this
publication was correct at the time of printing.
As we are continuously improving our products we retain
the right to make changes to the product and the
documentation at any time. Updated manuals are
available from our website www.simrad-yachting.com,
and are free to download.
© Copyright 2009 by Navico Holding AS.
2 | AC12/AC42 Installation manual
About this manual
Rev. A 19.10.07 First issue
Rev. B 03.07.08 Corrections on system drawings.
Spare parts list updated.
Rev. C 10.11.08 Correction on board terminals
page 13.
Rev. D 27.01.09 Correction page 13.
This manual is intended as a reference guide for installing
and maintaining the Simrad AC12 and AC42 autopilot
computers and other components in an autopilot system.
Please take time to read this manual to get a thorough
understanding of the system components and their
relationship to a complete autopilot system.
Important text that requires special attention from the
reader is emphasized as follows:
Used to draw the reader’s attention to a comment or
some important information.
Used when it is necessary to warn personnel that a
risk of damage to the equipment or hazard exists if
care is not exercised.
AC12/AC42 Installation manual | 3
Content
1 System description ..................................... 5
1.1 General ..................................................5
1.2 How to use this manual.............................5
1.3 Software record.......................................6
2 Installation................................................. 7
2.1 Installation checklist.................................7
2.2 Unpacking and handling............................7
2.3 Determine system configuration.................8
2.4 Autopilot system layout.............................9
2.5 Autopilot computer installation.................11
2.6 Rudder Feedback installation ...................14
2.7 LF3000 Linear Feedback..........................16
2.8 Drive unit installation..............................18
2.9 AP24 and AP28 Control unit installation.....20
2.10 FC40 and RC42 Compass installation.......23
2.11 R3000X Remote Control installation ........24
2.12 JS10 Joystick.......................................24
2.13 S35 NFU Lever installation.....................25
2.14 Interfacing ..........................................25
2.15 SimNet ...............................................26
2.16 External Alarm.....................................30
3 Spare Parts List ........................................ 31
4 | AC12/AC42 Installation manual
4 Technical specifications............................ 35
4.1 AP24 Autopilot System............................35
4.2 AP24 Control Unit...................................36
4.3 AP28 Control Unit...................................38
4.4 Autopilot Computers............................... 39
4.5 FC40 Fluxgate Compass..........................41
4.6 RC42 Rate Compass ...............................42
4.7 RF300 Rudder Feedback..........................43
4.8 RF25 Rudder Feedback ...........................45
4.9 R3000X Remote Control..........................45
4.10 JS10 Joystick.......................................46
4.11 SimNet ...............................................47
4.12 IP protection........................................47
4.13 AT10 SimNet/NMEA0183 converter.........48
5 Index........................................................ 51
System description | 5
1System description
1.1 General
The autopilot computer is the main unit in the AP24 and
AP28 autopilot systems. It contains the steering
computer and electronics for the drive unit motor and
clutch and provides interface to other system
components. Two models, AC12 (8/16 A motor current)
and AC42 (30/50 A motor current) are available.
It communicates on the proprietary SimNet data and
control network to establish a reliable digital
communication and power distribution between the units
in the autopilot system as well as other Simrad products.
SimNet provides high speed data transfer and control of
Simrad products integrated in a total steering and
navigation system.
1.2 How to use this manual
This manual is intended as a reference guide for installing
and maintaining the Simrad AC12 and AC42 autopilot
computers and other components in an autopilot system.
Please take time to read this manual to get a thorough
understanding of the system components and their
relationship to a complete autopilot system.
Other documentation material that is provided with your
system includes an operator manual which includes the
setup instructions for the system, a control unit
installation guide and a warranty card. The warranty card
must be filled out by the authorized dealer that
performed the installation.
6 | System description
1.3 Software record
Control units
When the system is switched on, a status display shows
the serial number and software version for the control
unit.
The shown readout is only an example!
Autopilot computers
Serial number and software version for autopilot
computers and other SimNet sources can be found under
the control unit User setup menu. Refer to Manual source
selection in the autopilot operator manual.
1.4 Exchange of software program
For upgrading the software of Simrad products/devices,
refer to Manual for Software Upgrade Tool, part no.
20222956.
Installation | 7
2Installation
An autopilot system includes several units that need to
be mounted in different locations on the boat, and also
need to interface with at least three different systems on
the boat:
•The boat's steering system
•The boats electrical system (input power)
•Other equipment on board (SimNet interfacing)
In addition, the advanced capabilities of the system
require the installer to perform a series of settings and
tests to verify proper operation of the system, refer to
the check list below.
2.1 Installation checklist
1. Determine the system configuration you are
installing (Page 8)
2. Perform the hardware installation (Page 11)
3. Connect SimNet devices to SimNet (page 26)
4. Perform Set-up (refer to Operator manual)
5. Test Autopilot Operation at Sea (refer to Sea Trial
instructions in the Operator manual)
2.2 Unpacking and handling
Care should be taken when unpacking and handling the
equipment. A visual inspection should be made to see
that the equipment has not been damaged during
shipment and that all components and parts are present
according to the packing list.
An autopilot system will include:
•Control unit (AP24 or AP28) with accessories
−Installation accessories
−Operator manual
8 | Installation
•Autopilot computer (AC12 or AC42) with accessories
−SimNet cable 5,5 m (18’)
−Installation accessories
−AC12/AC42 Installation Manual
•Compass (FC40 or RC42) with 5,5 m (18') SimNet
cable attached
•Feedback unit (RF300 or RF25) with transmission rod
and cable attached.
•Appropriate drive unit for the installation (unless the
autopilot is going to operate an existing drive unit or
solenoids).
•Optional equipment that may have been ordered for
the installation.
2.3 Determine system configuration
It is important to become familiar with the configuration
of the system prior to beginning the installation. An
autopilot basic single station system is shown in Figure
2-1 and a system layout with options is shown in Figure
2-2
Plan your cabling and configure the SimNet network in
accordance with chapter 2.15 on page 26. Pay particular
attention to the autopilot computer/drive unit
combinations.
As most of the units are communicating on a common
network (SimNet) with identical connectors, the
installation is simple. Try to mount the units within the
standard cable length supplied with each unit. SimNet
cables are available from your distributor (see page 33)
for connection to other SimNet devices and cable
extension.
1On boats powered by outboards or stern drives it
may be difficult to install a rudder feedback unit
(Refer to RF300, RF25 or LF3000 in this manual).
Use of the Virtual Rudder Feedback, VRF™,
algorithms in the software may then be preferred
as this requires no installation of a rudder feedback
Installation | 9
unit. The VRF can be used on boats up to 40 ft.
2The VRF technology requires a Simrad rate
compass (RC42) for heading information to the
autopilot system.
2.4 Autopilot system layout
12/24V Motor supply
Drive unit
AP24
Control Unit
Multijoiner
Compass
5,5 m
5,5 m
5,5 m
24
AP
MODE
MENU AUTO STBY
TURN
1010
PWR
1
1
RF25 Rudder Feedback
12V SimNet supply
(SimNet cable with terminator)
Autopilot
Computer
Non SimNet
SimNet
Figure 2-1 AP24 basic system layout
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2
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