Kobelt 7173-K Manuale utente

8238-129th Street, Surrey, B.C. Canada V3W 0A6

Telephone 604-572-3935 Fax 604-590-8313

http://www.kobelt.com

7173-K MANUAL

February 2012

Revised April 2009

MODEL 7173-K INSTRUCTION MANUAL

CONTENTS

1. MODEL 7173-K ELECTRONIC FFU STEERING SYSTEM

2. MODEL 7173-K COMPONENTS

3. MOUNTING THE 7173-K AMPLIFIER UNIT

4. MOUNTING THE FFU CONTROLLER UNITS

5. MOUNTING THE MODEL 7174 RUDDER FEEDBACK UNIT

6. WIRING THE SYSTEM

7. TESTING THE SYSTEM

8. TROUBLESHOOTING

9. PERIODIC INSPECTION

DRAWINGS

7173-001 - SINGLE SPEED STEERING SYSTEM WIRING DIAGRAM

7173-002 - DUAL RATE SPEED STEERING SYSTEM WIRING DIAGRAM

7173-003 - SINGLE SPEED CATAMARAN STEERING SYSTEM WIRING

DIAGRAM (ELECTRONIC TIE BAR)

7173-004 - TWO INDEPENDENT SINGLE SPEED STEERING SYSTEM

WIRING DIAGRAM

7173-005 - SINGLE SPEED STEERING SYSTEM BLOCK DIAGRAM

7173-006 - DUAL RATE SPEED STEERING SYSTEM BLOCK DIAGRAM

7173-007 - SINGLE SPEED CATAMARAN STEERING SYSTEM BLOCK

DIAGRAM

7173-008 - TWO INDEPENDENT SINGLE SPEED STEERING SYSTEM

BLOCK DIAGRAM

7173-009 - SINGLE STEERING SYSTEM WITH OPTIONAL JOG LEVER

CONNECTION DIAGRAM

7173-010 - SINGLE STEERING SYSTEM WITH OPTIONAL AUTO PILOT

CONNECTION DIAGRAM

A-400899 - 7174 FEEDBACK UNIT SWITCHES WIRING DIAGRAM

SELECTING AND INSTALLING

ELECTRONIC REMOTE STEERING CONTROL

When a full follow-up remote electronic control becomes integrated with either a

manual steering system (helm pump) or a jog lever, the full follow-up control must

be de-energized before putting the manual steering devices or jog levers into

service.

If the full follow-up control system is not turned off when maneuvering with other

methods, the steering will remain in the position as requested by the full follow-up

system. For example, if a 2-speed steering system is installed whereby the full

follow-up system would receive a smaller volume and the jog lever, via a separate

solenoid, would receive a bigger volume of oil, the steering system would follow

the jog lever until it is released. Then the follow-up control would put the rudder

back to its original position.

We, however, highly recommend having a switch installed on the pump starting

panel capable of turning off the 7173 and associated components. If more than one

full follow-up control unit is used in a given system, a station transfer system is

required since the 7173 can only use a command from any one station at any one

time. Feeding two separate signals into the electronic control system would

obviously create problems. If an autopilot is installed aboard a vessel, all full

follow-up signals should be coordinated via a station transfer system. In other

words, the autopilot must be considered as an extra station (but wired directly to

the solenoid). If a vessel is equipped with two full follow-up electronic control

stations and one autopilot, it is recommended to install a 3-station transfer system:

two stations for the full follow-up and one for the autopilot and, of course, a switch

as indicated on our electronic drawings alongside the electric breaker which is

supplied by the shipyard. The switch also becomes shipyard supply and should be

incorporated into the pump control panel for the hydraulic pumping unit.

Electronic Full Follow-up

Amplifier Model 7173-K

This unit is designed to accept the command

signal from our Models 7165, 7166, 7167,

7169, 7171, 7172 and 7176 and co-ordinates

the desired rudder position with our feedback

unit Models 7168 and 7174. Models 7144,

7145 and 7148 are equipped with solenoid

valves and can be activated by the Model

7173-K to disperse hydraulic fluid to the

hydraulic steering system to maintain the

desired position.

This device can be located anywhere aboard

ship, even in the steering compartment, since

its watertight and non-corrosive enclosure

material will protect the electronics internally.

The Model 7173-K is a multi-optional driver

board (12- or 24-Volt DC) which can

control:

1. Single steering system

See drawings 7173-001 / 7173-005

2. Dual speed steering system

See drawings 7173-002 / 7173-006

3. Two independent steering systems

controlled by the same controller

(This is ideal for catamaran steering

because of its electronic tie bar)

See drawings 7173-003 / 7173-007

4. Two independent hydraulic systems,

i.e. steering and bucket control

See drawings 7173-004 / 7173-008

It can easily be changed in the field, see

manual.

MODEL 7173-K

All dimensions in inches (mm)

TYPICAL MULTIPLE STATION ARRANGEMENT

MODEL 7173-K ELECTRONIC FULL FOLLOW-UP STEERING SYSTEM

The KOBELT 7173-K System consists of the following components:

1. Electronic FFU Amplifier

2. Controller (Wheel Controller, FFU Lever or Joystick)

3. Follow-up (Rudder Feedback) Unit

4. Solenoid Interface Valve

The Model 7173-K System is used to set the position (or the angle) to which the Rudder goes.

The Amplifier Unit compares the respective command and feedback signals from the Controller

and Follow-Up Unit. If the signals are not equal, the Amplifier Unit applies directional control

to the hydraulic pressure to move the rudder in the appropriate direction. When the Controller

and Follow-Up signals are equal, the Amplifier shuts off directional control and the rudder stops.

Mounting the Model 7173-K Amplifier Unit

The Model 7173-K Amplifier Unit is mounted inside a waterproof housing. The housing should

be mounted in a convenient, easily serviced location. Allow enough space to permit opening of

the housing cover (see Model 7173-K data sheet).

Mounting the FFU Controller Unit

The following types of controllers are available:

Model 7171 Lever Controller

Model 7165 Joystick Controller

Model 7169 Joystick Controller

Model 7176 Walk-about Controller

Model 7167 2-Axis Joystick Controller

Model 7166 Wheel Controller

Model 7172 Wheel Controller

Model 6655 Steering and Engine Control Head

The Models 7166 and 7172 Wheel Controller is normally bulkhead mounted. A steering wheel

should be attached to this type of Controller (see individual data sheet). The Model 7171 FFU

Lever Controller is waterproof and is normally mounted on a flat surface (see Model 7171 data

sheet). The Model 7169 Joystick Controller should also be mounted on a flat surface.

MOUNTING THE MODEL 7174 RUDDER FEEDBACK UNIT

The Model 7174 or 7168 Follow-Up (Rudder Feedback Unit) must be mounted near the steering

gear as shown in the diagram below. The output signals will then be calibrated with the tiller in

place.

IMPORTANT: Hydraulic steering gears using a hydraulic Full Follow-Up System (often

referred to as “Telemotor” or “Accumotor”) must drive the Feedback Unit from the Servo

Cylinder, not the Rudder stock. In such a case, the Model 7174 Follow-Up should be mounted

approximately two feet from the end of the Servo Cylinder. This is done to ensure proper linear

motion. The cable for the Models 7174 or 7168 Feedback Unit should be a 3-conductor

#18-gauge cable.

WIRING THE SYSTEM

All cables should be weatherproof marine type and be free of joints or splices. If it is necessary

to join wires, a proper waterproof junction box should be used.

The input power to the Model 7173-K Amplifier Unit is 11 VDC to 28 VDC. The power cable

(2-conductor, #14-gauge) should be run from the switchboard through a customer-supplied

on/off switch via a circuit breaker or fuse (8 amp).

The cable to the pumpset solenoid/relay should be 3-conductor #16 gauge wire.

A 3-conductor, #18 gauge cable should be used for the Controller. If more than one controller is

used, a “Station Select” switch must be connected between the controller and the Model 7173-K.

The “Station Select” switch is optionally supplied. A mechanical selector switch requires a

single pole, multi-position switch. Consult the factory for electronic station selector systems

(Model 7173-T). The 8 VDC reference supply from the Model 7173-K terminals #9 and #12 or

#13 and #16 is common to all Controllers. Only the output signals coming back from each FFU

Controller are connected to the station selector. From the Station Selector switch, the FFU

Controller output is connected to Model 7173-K terminal #11 or #15.

The Model 7170 NFU Controller can also be connected to the Model 7173-K System (see Model

7170 data sheet). Activating the Model 7170 Jog switch will temporarily override the FFU

System. FFU Control will be returned automatically as soon as the Jog switch is deactivated. If

the rudder moves in the wrong direction, reverse the black and white wires.

NOTE: See Drawing 7173-009 for how to interface a NFU Jog Switch to a FFU System where

the Jog Switch can be used for backup.

TESTING THE SYSTEM

1. Check that the supply voltage is connected to the correct amplifier terminals. The circuit

board has built-in polarity protection to prevent circuit damage, but the system will not

initialize until polarity is correct.

2. Centre the rudder and ensure that the rudder follow-up unit is mechanically centered. Centre

all FFU controllers.

3. Turn on power to the Model 7173-K Amplifier Unit.

4. Turn on the hydraulic pumpset or, in the case of an engine driven pumpset, start the engine.

5. The rudder should stay at midship and may hunt back and forth (see steps #9 and #10) at the

midship position. If the rudder moves to a hardover position, shut off power to the amplifier

and reverse the wires going to the solenoid or the black and white wires coming from the

feedback unit (see applicable drawing) on the Model 7173-K circuit board. Re-apply power

to the Model 7173-K Amplifier Unit.

6. Move the FFU controller to the 20° port. The rudder should move in the port direction. If

the rudder moves to starboard, reverse the black and white wires coming from the controller.

7. Repeat step #6 for any additional controllers wired via a station selector.

8. Move the FFU controller to a hardover position and adjust the internal FFU controller trim

pot until the rudder stops just before the hardover position. Also, rudder limit adjustment

can be achieved by adjusting rudder limit trim pots on 7173-K board or by adjusting the

stroke on the feedback unit. NOTE: You must not allow the cylinder to continually push

against the mechanical stops (hardover position).

9. Move the FFU controller to the centre position and adjust the deadband adjustment trim pot

(R17 or R31) clockwise until the rudder begins to hunt back and forth (rudder may already

be doing this).

10. Carefully adjust the R17 or R31 deadband control counterclockwise until the hunting effect

stops. This setting will be the maximum useable gain for your system. Check the

adjustment several times by moving the controller to various positions. If hunting starts, re-

adjust R17 or R31 counterclockwise to correct.

CAUTION: In order to avoid overheating/damaging the solenoid coils or the 7173-K amplifier,

power to the amplifier should be disconnected if hydraulic power is not available.

TROUBLESHOOTING

SYMPTOM POSSIBLE CAUSE REMEDY

System dead

- power off

- fuse blown

- DC power input polarity reversed

- turn on power

- replace fuse

- reverse connection

Erratic operation

- follow-up pot of FFU or controller

potentiometer defective

- check follow-up and

controller potentiometer

- meter output voltage,

replace if necessary

Rudder hunts back

and forth

- R17 or R31 deadband control in

Model 7173-K Amplifier incorrectly

adjusted

- reduce gain by turning

counter-clockwise

Rudder goes to a

hardover position

- defective potentiometer

- damaged cable

- sticky solenoid valve or relay

- loose follow-up linkages

- solenoid wires reversed

- feedback wires reversed

- replace

- repair

- repair or replace

- repair

- reverse wires

Rudder does not travel

same number of

degrees hardover to

hardover

- control potentiometer not centered

- feedback unit or potentiometer not

centered

- meter output voltage or

resistance

- meter output voltage or

resistance

L1 and L2

continuously ON - U1 damaged - replace

L3 and L4

continuously ON - U2 damaged - replace

Indice

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