Kobelt 7173-KAS User manual

8238-129th Street, Surrey, B.C. Canada V3W 0A6
Telephone [phone] Fax [phone]
http://www.kobelt.com
“Leaders in Quality Marine Controls, Steering Gear, and Disc Brakes.”
7173-KAS MANUAL
February 2012

“Leaders in Quality Marine Controls, Steering Gear, and Disc Brakes.”
MODEL 7173-KAS INSTRUCTION MANUAL
CONTENTS
1. MODEL 7173-KAS ELECTRONIC FFU STEERING SYSTEM
2. MODEL 7173-KAS COMPONENTS
3. MOUNTING THE 7173-KAS 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
401706-1 - SINGLE SPEED STEERING SYSTEM BLOCK DIAGRAM
401706-2 - SINGLE SPEED STEERING SYSTEM WIRING DIAGRAM
401706-3 - DUAL RATE SPEED STEERING SYSTEM BLOCK DIAGRAM
401706-4 - DUAL RATE SPEED STEERING SYSTEM WIRING DIAGRAM
401706-5 - SINGLE SPEED CATAMARAN STEERING SYSTEM BLOCK
DIAGRAM
401706-6 - SINGLE SPEED CATAMARAN STEERING SYSTEM WIRING
DIAGRAM (ELECTRONIC TIE BAR)
401706-7 - TWO INDEPENDENT SINGLE SPEED STEERING SYSTEM
BLOCK DIAGRAM
401706-8 - TWO INDEPENDENT SINGLE SPEED STEERING SYSTEM
WIRING DIAGRAM
401706-9 - 7174 FEEDBACK UNIT SWITCHES WIRING DIAGRAM
401706-10 - SINGLE STEERING SYSTEM WITH OPTIONAL JOG LEVER
CONNECTION 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.

MODEL7173-KAS
Electronic Full Follow-Up Amplifier
This unit is designed to accept the command signal
from our Models 6657, 7165, 7166, 7167, 7169,
7171, 7172, 7176, 7196 7197 and 7198 and
coordinates the desired rudder position with our
feedback unit Models 7168 or 7174. Fluid flow
control Models 7144, 7145 and 7148 are equipped
with solenoid valves and, when activated by the
Model 7173-KAS, will disperse hydraulic fluid to the
hydraulic steering system to maintain the desired
position.
The device can be located anywhere aboard ship,
even in the steering compartment, since its
watertight and non-corrosive enclosure will protect
the internal electronics from the effect of the
environment.
The Model 7173-KAS is a multi-optional driver
board working on 12- or 24-Volt DC. In the event of
feedback potentiometer failure or wire break, the
board will act in fail in mode. An LED light will be
ON and the alarm output is active for monitoring
control or feedback potentiometer failure or wire
break.
Also the 7173-KAS provides a pump on demand
pilot signal (12 or 24 VDC) that can control a
relay/contactor to energize the pump whenever any
directional solenoid is activated; therefore, the
pump is not continuously running.
Several options can be provided for
•Single speed steering system – see drawings
401706 sheets 1 & 2
•Dual speed steering system – see drawings
401706 sheets 3 & 4
•Single speed catamaran steering system
(electronic tie bar) – see drawings 401706
sheets 5 & 6
•Two independent single speed steering system
(steering/bucket) – see drawings 401706
sheets 7 & 8.

MODEL 7173-KAS
Dimensions are in inches (mm)
TYPICAL MULTIPLE STATION ARRANGEMENT

MODEL 7173-KAS ELECTRONIC FULL FOLLOW-UP STEERING
SYSTEM
The KOBELT 7173-KAS 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-KAS 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-KAS Amplifier Unit
The Model 7173-KAS 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-KAS data sheet).
Mounting the FFU Controller Unit
The following types of controllers are available:
Model 6655 Steering and Engine Controller
Model 6657 Steering / Engine Controller
Model 7165 Joystick Controller
Model 7166 Wheel Controller
Model 7167 2-Axis Joystick Controller
Model 7169 Joystick Controller
Model 7171 Lever Controller
Model 7172 Wheel Controller
Model 7176 Walk-about Controller
Model 7196 Lever Controller
Model 7197 Lever Controller
Model 7198 Dual Lever Controller
The Model 7172 Wheel Controller is normally bulkhead mounted. A steering wheel with a 1"
bore should be attached to this Controller (see Model 7172 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-KAS 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-
KAS. 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 Model 7170 NFU Controller can also be connected to the Model 7173-KAS 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.

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-KAS 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-KAS circuit board. Re-apply
power to the Model 7173-KAS 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-KAS 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-KAS
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
- deadband control in Model 7173-KAS
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
- 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
LED Lights and Output Indicator Information
If “L1” LED light is ON, then Solenoid “A” output is active.
If “L2” LED light is ON, then Solenoid “B” output is active.
If “L3” LED light is ON, then Solenoid “C” output is active.
If “L4” LED light is ON, then Solenoid “D” output is active.
L1 and L2 continuously ON - U1 damaged - replace
L3 and L4 continuously ON – U2 damaged - replace
If “L5” LED light is ON, then the “Alarm Output” will be active to indicate control or feedback
potentiometer failure or wire break. The 7173-KAS will fail in mode upon potentiometer or wire
break failure.