Kobelt 7175 Instruction Manual

Kobelt Manufacturing Co. Ltd.
7175 Analog Indicators: Rudder Angle,
Rudder Order and Propeller Pitch
Owner’s Operation, Installation &
Maintenance Manual
February 2018

7175 Analog Indicators: Angle, Order & Pitch Kobelt Manufacturing Co. Ltd.
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NOTES:
RECORD DATA BEFORE INSTALLATION FOR FUTURE REFERENCE
Model #:
Serial #:
Date of Purchase:
Date of Installation:

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TABLE OF CONTENTS
1Introduction ............................................................................................................ 4
1.1 Contact .................................................................................................................... 4
1.2 Safety....................................................................................................................... 4
2Product Description ................................................................................................. 6
2.1 Technical Data ......................................................................................................... 7
2.2 Retired Models of 7175 Indicators........................................................................... 8
3Installation .............................................................................................................. 9
3.1 Mechanical .............................................................................................................. 9
3.2 Electrical ................................................................................................................ 10
4Commissioning ...................................................................................................... 15
4.1 Electrical Check...................................................................................................... 15
4.2 Calibration and Adjustment ................................................................................... 15
4.3 Functional Test ...................................................................................................... 17
5Operation.............................................................................................................. 18
6Maintenance ......................................................................................................... 19
6.1 Preventative maintenance..................................................................................... 19
6.2 Recommended Spare Parts.................................................................................... 19
7Troubleshooting .................................................................................................... 20
8Warranty............................................................................................................... 21
9Appendix A: Installation Dimensions...................................................................... 22
10 Appendix B: Installation Cut-Out Template ............................................................ 23

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1INTRODUCTION
1.1 CONTACT
Kobelt Manufacturing Co. Ltd.
8238 129th Street
Surrey, British Columbia
Canada, V3W 0A6
Sales Tel:
Fax:
Email:
Website:
[phone]
[phone]
[e-mail]
www.kobelt.com
This document is intended to clearly present comprehensive product data and provide
technical information to assist the end user in design applications. Kobelt reserves the right,
without notice, to change the design, or construction, of any products and to discontinue or
limit distribution of any products. Kobelt also reserves the right to change, or update, without
notice, any technical information contained within this document.
Kobelt recommends that customers visit our website to check for updates to this Manual.
Once a product has been selected for use, it should be tested by the user to ensure proper
function in all possible applications. For further instructions, please contact our distributors or
visit our website.
1.2 SAFETY
1.2.1 Safety Alerts
Throughout this manual, the following symbols, and their accompanying explanation, are
used to alert the user to special instructions concerning a service or operation that may be
hazardous if performed incorrectly or carelessly. The associated risk levels are stated below.
This symbol indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury.
This symbol indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
This symbol indicates a hazardous situation, which if not avoided,
could result in minor or moderate injury.
This symbol informs the reader of events not related to personal
injury but which there is a risk of damage to property or equipment.
This symbol informs the reader of safety-related instructions or
procedures.

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1.2.2 Notice to Installer
Disregarding the following safety measures can result in an accident causing severe injury to
personnel and damage to material assets.
•Only use the product as directed in this manual.
•Never put the product into service if there is evidence of visible damage.
•Never put the product into service before fully completing installation and
commissioning.
•Do not carry out any modifications to the product.
•Only use authentic Kobelt spare parts.
•Observe all local regulations, directives and laws during the installation of this product.
•All installation, commissioning, and maintenance work must only be conducted by
qualified personnel. (For the purpose of this manual, qualified personnel are persons
who are familiar with the assembly, installation, commissioning, and operation of the
product and who have the qualifications necessary for their occupation.)
•Observe all specifications in this manual. If these guidelines are not followed and
damage occurs, the warranty will be voided.
1.2.3 Product Hazards
Disconnect Power: Turn off power at distribution panel before
beginning installation to protect installer from electrical hazards.
Voltage and Current Compatibility: Confirm that the power source
is compatible with the maximum voltage and current ratings of the
product variant. Failure to do so could result in damage or fire.
Disassembly and repair of this electronic unit should only be
performed by authorized service personal. Any modification of the
serial number or attempt to repair the original equipment or
accessories by unauthorized individuals will void the warranty.

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2PRODUCT DESCRIPTION
The 7175 Analog Indicators product line consists of a range of gauges to display rudder angle
position, rudder order command, and propeller pitch at your vessel’s control stations. The
product line consists of both Master and Slave back-lit gauges providing a variety of
monitoring solutions to suit the configuration requirements. The indicators are driven by a
position transducer such as the Kobelt 7163, 7168, or 7174 Rudder Feedback Units (RFU).
The 7175 product line consists of the following products:
Table 1: Product Family
KOBELT PART #
DESCRIPTION
MASTER UNIT
SLAVE UNIT
FACE STYLE
Rudder Angle
7175-MZ
7175-SZ
A
Rudder Angle (Reversed)
--
7175-SRZ
B
Rudder Order
7175-HMZ
7175-HSZ
C
Propeller Pitch
7175-PMZ
7175-PSZ
D
A
B
C
D
Figure 1: Face Styles

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Figure 2: Master and Slave Unit Back View
2.1 TECHNICAL DATA
Table 2: 7175 Technical Data
MODEL
KOBELT P/N:
7175-MZ,
7175-HMZ,
7175-PMZ
7175-SZ,
7175-SRZ,
7175-HSZ,
7175-PSZ
NOMINAL VOLTAGE
24 VDC / 12 VDC
--
POWER CONSUMPTION
20 mA
--
PROTECTION, TOP SIDE EXPOSURE
IP56
PROTECTION, BOTTOM SIDE EXPOSURE
IP20
OPERATING TEMPERATURE
-4°F … 131°F [ -20°C … 55°C ]
STORAGE TEMPERATURE
-4°F … 158°F [ -30°C … 70°C ]
PRODUCT DIMENSIONS
(WIDTH x DEPTH x HEIGHT)
3.8" x 3.1" x 3.8”
[96 mm x 78 mm x 96 mm]
PRODUCT WEIGHT
0.9 lbs [ 0.4 kg]
RECOMMENDED DRIVING
POTENTIOMETER
1kΩ
--
MAXIMUM NUMBER OF MASTER UNITS
1
MAXIMUM NUMBER OF SLAVE UNITS
5
MOVEMENT ACCURACY
± 1.5°
MOVEMENT RANGE
± 45°
ILLUMINATION BULB TYPE
T3-1/4 Wedge Type

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2.2 RETIRED MODELS OF 7175 INDICATORS
The new 7175 Analog Indicators product line is a replacement for
retired 7175 Analog Indicator models.
The new products are backwards compatible with the retired
products however care should be taken during installation and
configuration as small variances between the products may exist.
PRODUCT DESCRIPTION
ACTIVE
PART NUMBER
(Z SERIES)
RETIRED
PART NUMBERS
Master Rudder Angle Indicator
7175-MZ
7175-MY-(vb)
7175-MY-24-(vb)
7175-MY-24
7175-M
7175-MY
7175-MA
7175-BMX
7175-BMA
Slave Rudder Angle Indicator
7175-SZ
7175-SY-(vb)
7175-SY-24
7175-S
7175-SY
7175-SX
7175-SA
7175-BSA
Slave Ruder Angle Indicator (Reversed)
7175-SRZ
7175-SRY
7175-SRX
7175-SRA
Master Rudder Order Indicator
7175-HMZ
(NONE)
Slave Rudder Order Indicator
7175-HSZ
(NONE)
Master Propeller Pitch Indicator
7175-PMZ
7175-PMY
7175-PMA
Slave Propeller Pitch Indicator
7175-PSZ
7175-PSY
7175-PSA
Master Propeller Pitch Indicator (Reversed)
NOT OFFERED
7175-PMRY
Slave Propeller Pitch Indicator (Reversed)
NOT OFFERED
7175-PSRY
Replacement Lamp Holder
*CALL KOBELT
7175-0001 (A SERIES)
7175-0002 (Y SERIES)

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3INSTALLATION
3.1 MECHANICAL
All meters contain the same physical properties and dimensions. Refer to Appendix A:
Installation Dimensions for physical dimensions.
The gauge meters are to be installed using a 3-3/8” round hole in the desired panel or dash
location on the vessel (refer to Appendix B: Installation Cut-Out Template for detailed
mounting dimensions).
Ensure proper clearance is provided behind the panel or dash
installation location to allow for securing the tightening clamps to
hold the unit securely.
3.1.1 Mechanical Mounting
Fasteners are provided with the gauge for mechanical and electrical mounting. Refer to Figure
3: 7175 Exploded Fastener View for recommended configuration.
1. Remove nuts and braces from the fastener package.
2. Insert unit into cut-out hole in the mounting location.
3. Install the braces on the back-side of the unit.
4. Replace the nuts and tighten to secure the unit to the mounting location.
Figure 3: 7175 Exploded Fastener View

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3.2 ELECTRICAL
The 7175 gauges support a nominal supply voltage of either 12VDC or 24VDC. The supply
voltage to the meter is isolated from the supply voltage used for the illumination. This
isolation allows the illumination to be powered from a separate power source or connected
to a common dimming control circuit for all dash mounted instruments.
The unit contains a T3-1/4 Miniature Wedge Base incandescent bulb holder with a 24VDC
bulb pre-installed. If required, an additional bulb is available in the shipping package for use
with 12VDC. To install, remove the 24VDC bulb with a twisting action and replace with the
12VDC bulb.
A circuit breaker of 2A is required between the vessel power supply
source and the indicator(s) as shown in the example installation
diagrams.
All terminal wire connections to the meter should use crimped ring
terminals to ensure a secure connection for high-vibration
environments.
Rudder Feedback Unit signals shown in the following figures are provided by standard Kobelt
RFUs. Please review the Kobelt website for all RFU options available.
Electrical installation of the 7175 should proceed as follows:
Disconnect Power: Turn off power at distribution panel before
beginning installation to protect installer from electrical hazards.
Remove Shipping Clip: Remove protection clip used for shipping
found between terminal posts before applying power to unit.
1. Wire electrical cables and power wires, according to one of the configurations shown in
Figure 5 through Figure 7 and the additional details in this section of the manual.
a. Verify supply breaker (or fusing) is correctly sized as per specifications table.
b. Verify wires and cables used are of the required gauge sizes and types as per
local marine regulations and standards.
2. Visually inspect all wiring is correctly installed.
3.2.1 Electrical Interfaces
The backside of the Master and Slave units contain the electrical connections for wiring of the
system. The Master and Slave units contain different wiring terminals and identifiers.

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Table 3: Master Gauge Backside Connections
Master Gauge
Pin Designator
Pin Type
Function
+12/+24 VDC
Power
Power Supply Source. Accepts either 12VDC or 24VDC
nominal voltage.
COM/POT-
Power
Power Supply Common connection point.
POT+
Output
Supplies power to the positive terminal of the Rudder
Feedback Unit potentiometer.
POT WIPER
Input
Receives feedback signal from the Rudder Feedback Unit
potentiometer.
Table 4: Slave Gauge Backside Connections
Slave Gauge
Pin Designator
Pin Type
Function
IN+
Input
Input current loop signal from Master unit.
IN-
Output
Output current loop signal from Slave unit.
Figure 4: Master and Slave Unit Connector Views

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3.2.2 Master Unit Configuration
Figure 5: Master Unit Configuration

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3.2.3 Master and Single Slave Unit Configuration
Figure 6: Master and Single Slave Unit Configuration

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3.2.4 Master and Multiple Slave Units Configuration
Figure 7: Master and Multiple Slave Units Configuration

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4COMMISSIONING
4.1 ELECTRICAL CHECK
Ensure that the unit is properly installed and secured before
powering on the 7175.
•Confirm that all electrical connections to the 7175 have been made.
•Confirm that a breaker has been installed correctly and is turned ON.
4.2 CALIBRATION AND ADJUSTMENT
The gauge may need to be adjusted to centre the pointer or to adjust the overall range of the
meter to align with the position of the rudders maximum travel.
Follow these instructions to configure the zero point and span using the on-board trimpots.
To reduce the potential for electrical shock and to avoid damaging
the 7175 electronics, use a non-conductive screwdriver, or other
equivalent tool, to adjust the trimpots or zeroing lever.
Exercise caution when reaching in with the screwdriver. Do not let it
touch any components other than the trimpots or zeroing lever.
Ensure no oil or other contamination enters the 7175 while its cover
is removed.
1. Turn OFF power to the 7175 prior to making adjustment.
2. Remove the clear plug protecting the trimpots or the zeroing lever, depending on
desired adjustment.
3. Use a non-conductive flathead or Phillips-head screwdriver to make adjustments.
a. Rotate trimpot clockwise to increase
b. Rotate trimpot counter-clockwise to decrease
c. Refer to the sections below for functional details of each trimpot and
the zeroing lever
4. Turn ON power.
5. Move rudder through its range to verify desired response.
6. Repeat as necessary, until the 7175 functions as desired.
7. Replace the clear plug protecting the trimpots or zeroing lever.
Default position for all configuration trimpots is at centre (pointing upward).

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Figure 8: Master Unit Calibration Arrangement
4.2.1 “ZERO” Trimpot: Adjust Midpoint
The zero adjust trimpot adjusts the midpoint of the range. When the rudder is centered,
adjust this trimpot to align the needle with the midpoint marking.
4.2.2 “SPAN” Trimpot: Adjust Range Size
The span adjust trimpot adjusts the range of the meter. The range reported by the RFU will
vary depending on mechanical linkages. This trimpot can be used to calibrate the hard-over
angles. The span trimpot must also be adjusted as more slave units are added in series.
4.2.3 Zeroing Lever
The zeroing lever is configured at the factory and should not need
adjustment in normal use. Only consider adjustment in the case of
major zero-point misalignment due to excessive vibrations or other
extreme conditions. Adjustment of the zeroing lever should be
performed by qualified personnel only.

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After removing the clear centre plug, the meter mechanism is visible through the small hole.
Detail of the mechanism can be seen in the inset in Figure 8. Adjustments can be made using
a long, thin screwdriver to move the lower part of the lever near the visible solder joint. This
adjustment can be performed on both the master and slave meters.
4.3 FUNCTIONAL TEST
Before commencing normal operations with the installed unit(s). A functional test shall be
conducted to ensure proper operation of the system as per the intended application and
configuration.
Functional testing should be done by qualified personnel only. The
system functionality should be fully tested dockside before an open
water sea trail is performed to ensure proper response of the
system based on rudder commands.
After installation perform the following function tests:
1. Center the rudder
a. Ensure that the meter displays 0°. If not, adjust the ‘Zero’ trimpot until it is
centered at 0°
2. Move the rudder to hard-over
a. Ensure that the meter displays the hard-over angle. If not, adjust the ‘Span’
trimpot until it is at the correct angle.

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5OPERATION
The 7175 Rudder Angle Indicator system requires no direct user input to function. The system
is passive and responds to signals from a Rudder Feedback Unit or alternative signal sources
such as control levers. The signal commands the needle position on the Indicator. This
position can be calibrated to correspond to physical rudder position or the position of an
alternative signal source.
A single master unit can drive up to 5 slave units. The slave units directly follow the meter
movement of the master. Span configuration is done on the master unit. Zero adjustment is
available on both the master and slave units.
If a backlight dimmer is installed in the system, the operating instructions of the dimmer
manufacturer/installer shall be followed for adjustment of the dimmer.

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6MAINTENANCE
6.1 PREVENTATIVE MAINTENANCE
•Quarterly (4 times per year)
oVisually inspect all wire connections for signs of wear.
•Every year
oInspect top and internal enclosure to ensure no adverse wear due to
environment.
oConfirm all electrical connections are secure.
oEnsure calibration and zero point of unit.
6.2 RECOMMENDED SPARE PARTS
As a minimum Kobelt recommends the following spare parts are on-hand:
Table 5: Recommended Spares
RECOMMENDED SPARES
QTY
ITEM
KOBELT PART #
1
T3-1/4 BULB, 24 VDC* (ANSI Model: 464)
6001-3632
1
T3-1/4 BULB, 12 VDC* (ANSI Model: 193)
6001-3633
* Select the spare bulb based on the desired operating voltage.
It is recommended that any required service work on a Kobelt unit
be performed by a factory authorized service representative. Please
contact the nearest Kobelt authorized distributor for assistance.

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7TROUBLESHOOTING
If you encounter problems with the operation of your product, please refer to the trouble-
shooting suggestions before contacting Kobelt for assistance. If the steps below do not
resolve your issue, please reach out either Kobelt directly or our Dealers in your area.
Table 6: Common Solutions
Problem
(Issue encountered)
Cause
(What it means)
Corrective Action
(What to do)
7175 indicator(s) not
operational
Blown fuse/circuit
breaker
Check and replace fuse or reset circuit
breaker
Wiring issue
Check for proper wiring
7175 unit does not
illuminate
Lightbulb not
correctly installed
Check the lightbulb installation and
ensure that all connections have been
properly made
Dimming is turned
down all the way (if
installed)
Adjust the dimming knob (if installed)
until the 7175 unit is adequately
illuminated.
7175 illumination to
dim or to bright
Wrong voltage light
installed
Change the bulb to match the system
voltage of either 12 VDC or 24 VDC.
Master indicator moves
in opposite direction to
rudder
Potentiometer
power wires are
reversed
Reverse the wiring at the IN+ and IN-
terminals of the Slave unit.
Correct the wiring following the
examples in Section 3.2.
Slave indicator moves
in opposite direction to
rudder
Input wires are
reversed
Reverse the wiring at the input
terminals.
Correct the wiring following the
examples in Section 3.2.
Port and Starboard
hard-over are not equal
Rudder angle
feedback unit is not
installed or
adjusted properly
Confirm correct installation and
adjustment of the rudder angle
feedback unit.
Rudder center angle
does not read zero
Scale range is
uncalibrated
Adjust span trimpot as described in
Section 4.2 to adjust scale.
Hard-over angle isn’t
correct
Span trimpot needs
adjustment
Adjust span trimpot as described in
Section 4.2.
Rudder centre angle
does not read zero
Zero adjustment is
required
Adjust zero trimpot as described in
Section 4.2.