Sitex SP120 Manuel

SP-120 Autopilot

INSTALLATION AND SERVICE

Software Version P-33

www.si-tex.com

SI-TEX SP-120 – SS34208/04/2015

BLANK PAGE

SI-TEX SP-120 – SS34308/04/2015

Index

WARNING! ...................................................................................................................4

SP-120 AUTOPILOT SYSTEM...................................................................................5

INSTALLATION OF SYSTEM COMPONENTS:....................................................6

DISPLAY UNIT ............................................................................................................ 7

COMPASS.................................................................................................................... 8

RUDDER FEEDBACK UNIT........................................................................................... 9

GPS WIRING CONNECTIONS..................................................................................... 11

HYDRAULIC REVERSING MOTOR CONNECTION........................................................ 11

MECHANICAL REVERSING MOTOR CONNECTION ..................................................... 11

Motor Connections...............................................................................................12

SOLENOID VALVE USE ............................................................................................. 13

INITIAL OPERATIONAL SETTINGS....................................................................14

MOTOR DIRECTION –AUTOMATIC SET UP............................................................... 14

MOTOR DIRECTION –MANUAL SET UP.................................................................... 14

SENSITIVITY ............................................................................................................. 14

RUDDER RATIO ........................................................................................................ 15

BACKLIGHTING......................................................................................................... 15

SET RUDDER LIMITS................................................................................................. 14

COMPASS HEADING .................................................................................................. 15

COMPASS CALIBRATION ........................................................................................... 15

COMPASS ALIGNMENT.............................................................................................. 15

TECHNICAL ADJUSTMENTS....................................................................................... 15

Adjusting the PID Control ...................................................................................17

SP-120 DEFAULT SETTINGS: .................................................................................... 18

SET UP OF THE GPS UNIT ......................................................................................... 19

SP-120 ALARMS....................................................................................................... 19

Off Course Alarm ................................................................................................19

GPS Alarm ...........................................................................................................19

DEFINITION OF TERMS .........................................................................................19

OVERVIEW OF OPERATION.................................................................................20

TROUBLE SHOOTING.............................................................................................21

SCHEMATIC DIAGRAM..........................................................................................22

WARRANTY ...............................................................................................................24

ADDITIONAL INFORMATION ..............................................................................24

SI-TEX SP-120 – SS34408/04/2015

Warning!

•THE AUTOPILOT IS A NAVIGATIONAL AID; AN ADEQUATE WATCH MUST BE MAINTAINED AT ALL

TIMES WHEN AUTOPILT IS IN USE.

•THE AUTOPILOT MUST BE PLACED IN MANUAL MODE WHEN THE VESSEL IS STATIONARY AS THE

SYSTEM WILL CONTINUE TO DRIVE THE RUDDER TO THE END OF ITS TRAVEL AND DAMAGE TO THE

SYSTEM CAN.

•IT IS STRONGLY RECOMMENDED THAT THE AUTOPILOT NOT BE USED WHILE NAVIGATING IN

RESTRICTED WATERWAYS AS WATER CURRENTS, WIND CHANGES OR RADIO TRANSMITTER

INTERFERENCE CAN ENDANGER YOUR OWN OR OTHER VESSELS.

•IF A GPS IS CONNECTED TO THE SYSTEM, THE AUTO MODE WILL NOT ENGAGE BELOW A SPEED OF

ONE KNOT AND WILL DISENGAGE FROM AUTO WHEN THE VESSEL SLOWS TO ONE KNOT.

SI-TEX SP-120 – SS34508/04/2015

SP-120 Autopilot System

The SP-120 autopilot control system comprises the following units:

•SP-120 display and control head.

•SI-TEX 9 Axis rate compass

•Rudder Feedback Unit (SP-120R only).

In addition the SP-120 has to be connected to a drive unit which controls the rudder actuator system in order to complete the full

autopilot system. The actuator system provides the physical movement to the rudder responding to the direction of control signals

provided by the SP-120. A rudder actuator system comprises one of the following:

•Hydraulic system with helm pump and ram

•Mechanical steering system

The autopilot should be connected to one of the following:

•Reversing motor / pump set connected into the existing hydraulic steering system

•Reversing mechanical drive unit connected to the existing steering mechanism

•Electronic Hydraulic Solenoid Valves

Block Diagram of Full System

Note: Dashed line (RFU) only applicable for SP-120R.

The SP-120 display provides full control of the autopilot system and indicates different modes for heading, course to steer and rudder

angle.

The system requires a supply voltage of 12 Volts DC.

SP-120

Display

Compass

Drive

Unit

RFU

(SP-120R)

SI-TEX SP-120 – SS34608/04/2015

Installation of System Components:

Ensure you have all the components of the autopilot.

Tools required:

•Screwdrivers – flat blade and Philips

•Side cutting pliers

•Wire strippers

•Spanners (various) or adjustable spanner

•70mm hole saw

•Power drill + assortment of drill bits

•Multi meter (DVM)

•Ancillaries such as tape, connecting block, screws, cable ties, etc.

Access for wiring must be provided. Cables have to be run to the power switchboard, display, compass, rudder feedback (if fitted) and

drive unit.

All wiring should be kept as far as possible from radio aerials and aerial cables to prevent interference to the radio and to prevent

transmitted signals from the radio influencing the SP-120. As no steel is used in the SP-120 display, there is negligible effect on a

steering compass.

The compass must be mounted a minimum distance of 1 metre form any boat compass, radios, speakers or other products with

magnetic properties to avoid interference.

The SP-120 must have a direct connection to power supply via a 15 amp circuit breaker or a 15 amp fused circuit and an isolating

switch.

SI-TEX SP-120 – SS34708/04/2015

Display Unit

Position:

The SP-120 Head unit should be mounted in a position accessible to the steering position and protected from direct rain or salt water

•Select a dry position

•For in dash mounting cut a 70mm (2.5”) hole (an optional mounting bracket is available and may be used for display mounting

– see your supplier)

•Drill mounting screw holes

•Mount the display using screws supplied (304 SS – 6G)

•Fit dome plugs to cover screws

•Ensure motor (yellow) and clutch (green) wires are not touching together before connecting power to the SP-120

•Connect red wire to + 12 volts DC

•Connect black wire to – 12 volts DC

SP-120 Display (Rear) Wiring Diagram:

SI-TEX SP-120 – SS34808/04/2015

Compass

Take care when handling the compass as it is a sensitive piece of equipment. The compass position is the most important item in the

installation of the autopilot. Good course holding is dependent on the compass being free from magnetic interference and excessive

rolling or pitching.

Position:

•Select a dry position free from magnetic interference. (Check other side of bulkheads for magnetic objects)

•Avoid locations near radios, speakers, antenna cables, wiring harnesses, or electric motors (ie: bilge pumps, winches, etc.)

•Mount the compass horizontally with the arrow (bow) pointing in the same direction as the boat’s bow. Compass cannot be

mounted upside down! Use non-magnetic screws (304 grade stainless steel)

•Run cable to SP-120 display position (keep away from other cables)

•Connect compass cable to SP-120 compass socket.

Compass Mounting:

Arrow on Compass oriented toward Vessels Bow.

Do Not Mount the Compass Upside Down!

Mounting Screw

covers open

SI-TEX SP-120 – SS34908/04/2015

Rudder Feedback Unit

Note: Only for SP-120R version.

The SP-120R Autopilot is supplied with an RFU (rudder feedback unit), which provides to the pilot a precise position of the boat

rudder.

Position:

•Refer diagram on page 8

•Mount rudder feedback adjacent to the tiller (rudder feedback movement must copy the angular movement of the tiller). Use

mounting bracket if required

•Note markings on the rudder feedback unit. P & S indicate the required movement of the tiller for course correction

•Rudder feedback is mounted with shaft uppermost

•Fit snap lock swivel joint to rudder feedback arm

•Fit link block to tiller arm

•Fit link arm from rudder feedback to tiller – adjust for correct angle

•Route cable to SP-120 display position

•Connect rudder feedback cable to SP-120 rudder socket

•When installation is complete, slowly move the steering by hand to ensure:

a) The direction indicated on the top of the RFU is correct

b) No undue mechanical strain is placed on the feedback or linkage

Notes:

1The rudder feedback unit is water resistant. However, if it is to be mounted in a wet position, some protection should be

provided to ensure the unit does not become excessively exposed to water or submerged in water.

2The rudder feedback unit may be mounted upside down, in which case the blue and red wires in the cable must be reversed

(yellow wire in cable is not used in the feedback).

SI-TEX SP-120 – SS3410 08/04/2015

Rudder Feedback Installation Diagram

Note: Pin locations are relative to pin 1 which always has a dot adjacent.

Note: The rudder feedback is factory aligned.

The arm should not be removed or loosened

the shaft as this will affect the “O” ring seal.

Octopus Mechanical Drive RFU Connections

NMEA-0183

Interfacing wires

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