CARLO GAVAZZI Carpark 3 User manual

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Table of contents
List of Abbreviations Used in This Manual ........................................................................................................ 6
Introduction:...................................................................................................................................................... 6
Planning a Dupline®Parking Guidance System (PGS) ........................................................................................ 7
Phase 1: Gather Tools and Information......................................................................................................... 7
Phase 2: Display Placement, Lane Definition, Sensor Mounting................................................................... 8
Phase 3: Design One Lane (…and Build from There) ..................................................................................... 9
Phase 4: Dupline®Parking Guidance Software ............................................................................................ 10
Secondary Considerations ........................................................................................................................... 11
One-Floor System Example ............................................................................................................................. 12
Car Park Displays ......................................................................................................................................... 12
Cabinets....................................................................................................................................................... 13
Addressing Parking Spaces and Displays ..................................................................................................... 13
Example of a PGS for Multiple Floors .............................................................................................................. 13
Installation of the PGS ..................................................................................................................................... 15
Short Installation ............................................................................................................................................. 15
SBPSUSL45 Carpark Lane Sensor (Used in Most Installations)................................................................... 15
SBP2MCG324 Carpark Master Channel Generator ..................................................................................... 16
SBP2WEB24 Carpark Controller .................................................................................................................. 16
SBP2CPY24 Carpark Server.......................................................................................................................... 16
Cabling ......................................................................................................................................................... 16
Cabinets....................................................................................................................................................... 16
Programming ............................................................................................................................................... 17
The Dupline®Fieldbus...................................................................................................................................... 17
General Information on the Fieldbus .......................................................................................................... 17
Dupline®Bus Features and Benefits ............................................................................................................ 17
Dupline®Basic Elements .............................................................................................................................. 18
Dupline®Bus and Smart Dupline®Bus ......................................................................................................... 19
Dupline®Bus Including a 3’rd Wire.............................................................................................................. 19
Dupline®Extra Features............................................................................................................................... 19
System Description.......................................................................................................................................... 20
Basic Modules.............................................................................................................................................. 20
Lane and vertical mounted sensors......................................................................................................... 20

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LED Indicator............................................................................................................................................ 21
Base A and Base B.................................................................................................................................... 21
Carpark Master Generator (CMCG)......................................................................................................... 22
Carpark Controller ................................................................................................................................... 22
Carpark Server ......................................................................................................................................... 23
Carpark Displays ...................................................................................................................................... 24
Carpark Display Interface Module........................................................................................................... 25
System Structure ............................................................................................................................................. 25
Determination of Lane, Line and Position................................................................................................... 26
The Carpark Master Generator with DC Power Supply............................................................................... 27
Sensors ........................................................................................................................................................ 28
Display and Display Interfaces..................................................................................................................... 28
Combining Lanes to a Complete System ..................................................................................................... 28
Software and Web server............................................................................................................................ 29
System Requirements...................................................................................................................................... 31
General Installation ......................................................................................................................................... 31
Cable............................................................................................................................................................ 31
Practical Cabling Techniques ....................................................................................................................... 32
Selection of Sensor Type ............................................................................................................................. 32
Placing the Sensor ....................................................................................................................................... 34
Positioning the Sensor................................................................................................................................. 36
Wiring the Base ........................................................................................................................................... 38
Mounting the Sensor in the Base Holder .................................................................................................... 39
Mounting the Display and Display Interface Module.................................................................................. 42
Display Interface Module ........................................................................................................................ 42
Display ..................................................................................................................................................... 42
Cabinet Installation...................................................................................................................................... 43
Cabinet Modules...................................................................................................................................... 43
Cabinet Structure......................................................................................................................................... 44
Interconnections of Cabinets ...................................................................................................................... 46
Software .......................................................................................................................................................... 48
Configuration Software ............................................................................................................................... 48
Configuration and Assigning Carpark Sensors......................................................................................... 48

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Assigning Display Interface Modules (DIM)............................................................................................. 52
Calibration ................................................................................................................................................... 54
Automatic calibration .............................................................................................................................. 54
Manual Calibration .................................................................................................................................. 56
Carpark Software......................................................................................................................................... 57
Basic Setup............................................................................................................................................... 57
System Calculation .......................................................................................................................................... 59
Rules of Thumb............................................................................................................................................ 59
Calculation ................................................................................................................................................... 60
Table for Cable Length, Cross Section and Number of Sensors in a Line .................................................... 61
Carpark Master Zone Counter (MZC) .............................................................................................................. 62
Introduction..................................................................................................................................................... 62
Hardware......................................................................................................................................................... 62
Sensor .......................................................................................................................................................... 62
Operating Principles of the Counting system.................................................................................................. 63
MZC.............................................................................................................................................................. 64
Detection Points (DPOs) .............................................................................................................................. 64
Initialisation and adjustment....................................................................................................................... 65
Stand-alone system examples......................................................................................................................... 65
MZC counting system with a split between standard and reserved spaces ................................................... 68
MZC combined with the Single-Space System ................................................................................................ 69
Installation of the Counting System ................................................................................................................ 70
The Count Sensor ........................................................................................................................................ 70
Sensor Hardware ......................................................................................................................................... 70
Sensor Installation (DPO)............................................................................................................................. 71
Two-sensor DPO .......................................................................................................................................... 71
Mounting the Sensors ................................................................................................................................. 74
Bumper-to-Bumper ..................................................................................................................................... 75
One-sensor DPO .......................................................................................................................................... 76
Programming the Sensor................................................................................................................................. 77
Appendix A: ..................................................................................................................................................... 77
Counting system accuracy........................................................................................................................... 77
Delineation .................................................................................................................................................. 78

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Speed bumps ............................................................................................................................................... 78
Anarchist drivers.......................................................................................................................................... 79
Sensor mounting ......................................................................................................................................... 79
Troubleshooting .............................................................................................................................................. 80

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Carlo Gavazzi Carpark 3
List of Abbreviations Used in This Manual
PGS – Parking Guiding System
CMCG – Carpark Master Channel Generator
CC – Carpark Controller
CS – Carpark Server
DIM – Display Interface Module
PCB – Printed Circuit Board
SIN - Specific Identification Number
MZC – Master Zone Counter
DPO – Detection Point
Introduction:
The Dupline® 3 Parking Guidance system saves time and reduces stress for drivers.
Dynamic displays, strategically positioned throughout the facility, provide ‘space available’ counts and
efficiently guide the driver to vacant spaces with clear and bright green arrows pointing the way.
If there are no vacant parking spaces in an area, the display will show a bright red cross to discourage the
drivers from entering this area. Other displays can be made to show the total number of vacant spaces on a
particular level or in the entire parking facility. Dynamic message displays can also be used in the facility to
provide additional information to drivers. Some examples could be Caution, Construction Ahead, Buckle-Up
or any other message that needs to be communicated to the drivers in the facility.
In the parking space
Space by space, we will focus on the 45-degree sensor for lane mounting. Installation of the vertical sensor
is also explained, but basically, physical installation and precautions are the same for all types of sensors
and LED indicators.
A 45-degree sensor with bright, built-in LEDs is placed in the lane outside each parking space. Eight
different colours, freely programmable, can be selected to show either green for vacancy or red for
occupied. If the space is for disabled parking, the colours become blue and red. The bright LED indicators
provide a visual reference from a distance as drivers search for vacant parking spaces.
The Dupline® Parking sensors utilise a special ultrasonic frequency, much like the one used by bats to catch
flying insects. A sophisticated microprocessor built into the sensor transmits a 40-KHz signal, which hits the
ground. All the echoes it finds are used to decide the bay status. Once detection has been confirmed, the

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indicator lights will switch from green or blue to red and the displays and software counts will be accurately
updated as well.
The Software…
The Dupline® 3 Parking Guidance System is inherently robust, and it is a stand-alone system. This system
requires no PC to run, it only needs a PC for system configuration. In addition, Carlo Gavazzi supplies
carpark software, which enables monitoring of the real-time situation of each parking space or level in a
facility. It also has an alarm component, which can provide logging and indication of a variety of conditions
with operator-defined limits.
Some typical alarm functions include time limits for individual spaces, occupied levels and maximum
occupied indications. Additionally, the software graphically displays tables and graphs showing the
occupancy rates for the areas, the levels and the entire facility.
The software is also an excellent tool for data logging and historical trending and analysis. Data can be
stored and utilised for multiple facilities, a single facility, a level, or even for an individual space.
The software allows authorised operators to book or reserve spaces. When an open space is booked, the
associated indicator light in the parking space will turn red, and it will provide a connection to the
software's overview where the corresponding virtual indicator light turns red. The software also provides a
web server that enables access to the carpark system via tablets, smartphones etc.
Planning a Dupline®Parking Guidance System (PGS)
As with any good system, the majority of your time and effort should be spent in the ‘planning’. An old
proverb says: ‘A good plan today is better than a perfect plan tomorrow.’
In this section system planning is divided into four distinct phases. These four phases should be completely
understood and completed before moving on to the actual Installation.
Phase 1: Gather Tools and Information
This includes technical drawings/information/layout of the parking system acquired from the customer. The
drawings used must always be the latest version to avoid any mistakes in the subsequent work.
The drawings should consist of lanes, cross-sections, parking spaces, both regular and for disabled, location
of displays and cabinets, cabinet size, available power and location and the location of the equipment room
where the software server will be installed.
Traffic flow: Single direction or bi-directional.
A true-to-scale CAD drawing with information of the parking structure, including lane distances in order to
determine the cabling and maximum number of sensors allowed per CMCG.
Parking space dimensions: length, width and the distance from the floor to the ceiling. The relationship
between the floor and ceiling angle is also critical.
The dimensions from centre line to centre line of the spaces.
Any information on using existing or new cable trays to pull wires for the sensors

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Phase 2: Display Placement, Lane Definition, Sensor Mounting
Define the number of displays based on the natural flow of cars in the parking facility, in cooperation with
the customer. The best way to do this is by making a joint walk-through and drive-through.
Confirm any architectural considerations with the customer regarding signals, finding one's way and any
other equipment to be installed in the parking facility.
Split the parking into segments and use the lanes as a natural part of these segments.
Define the type of displays. Should they simply display an ‘arrow’ and ‘red-cross’, or should they display
space availability counts as well? It all depends on the natural flow and the customer’s requests and needs.
Determine the necessary environmental ratings of the displays in relation to the intended use and
installation. Also take into consideration the accidental ingress of water from plumbing leaks and wind-
blown rain or snow.
Decide if there should be one or more multi-level ‘Tower’ or ‘Monument’ displays installed at the entrance
to the parking structure providing a snapshot of all available spaces on each level.
What should the displays show? Several available spaces in many lanes or just local available spaces from a
single lane.
A maximum of 50 sensors and a maximum of 150 m wire in a line (branch). A maximum of 90 sensors per
generator. General rules based on 1. 5 mm2cable.
Decide whether space-mounted vertical sensors, lane-mounted 45-degree sensors or sensors and separate
LED indicators should be used.
Determine whether the sensor must be mounted directly to the ceiling or in a tray or lowered. Always try
to select the most functional and aesthetic solution in relation to cost-effectiveness.

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Decide which spaces should be used as disabled parking spaces. Normally, disabled parking spaces are
placed close to escalators and elevators, and their numbers are determined in accordance with regulatory
laws.
Determine the number and placement of the cabinets. Ideally, they should be placed so that the sensor
loads are equal in all directions. They should be accessible only by ladder or cherry picker so as to be
protected from tampering. The maximum rating of the enclosures should be NEMA 3R or IP54.
Phase 3: Design One Lane (…and Build from There)
As a rule-of-thumb, there is a maximum of 50 sensors and 150 m (490 feet) of wire in a line. The wire must
be an unshielded 14-16 AWG type (1.5mm2). There must be a maximum of 90 sensors per generator. If the
line has less than 50 sensors and the wire length is longer than 150 m (490 feet), please refer to the voltage
drop calculation described in detail in the ‘calculation’ section.
Power supply calculation (the number of sensors determine the size of the power supply). Because of the
pulsating output from the CMCG, always use a double size power supply with power out on 28 VDC. When
using a 28- VDC/2.5- Amp power supply, 50 sensors can be installed in a line. When using a 28 VDC / 5 Amp
power supply, 90 sensors can be installed per generator (CMCG).

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The sensor/base must be mounted either on the ceiling or a rail. Daisy-chain all the sensor bases and
display interface modules in the lane with the Dupline® 3-wire bus. Power the system and program the
sensors and displays by means of the SBP2WEB24 programming tool.
Design of the placement of sensors, indicators, cable trays and cabinets.
If you use the 45-degree angled sensor SBPSUSL45, it is essential to mount it at a distance of between 2 and
2.5 m from the floor.
If you use the vertical sensor SBPSUSL, the maximum height must not exceed 4 m (13.2 feet). If so, it is
important that the sensor is lowered by means of ceiling mounting brackets.
The sensor must be mounted with a vertical deviation of maximum +/- 5°.
Using external LED indicator SBPILED, please make sure they are installed in the lane, so that they are
visible for drivers at a satisfactory distance.
Use aesthetic cable rails, where sensors can be installed and cables can be pulled and mounted.
Place cabinets in a logical way with short distances to the lanes to avoid long cables. For example, place
many small cabinets in the area or on the floor or place a big cabinet in the middle of the area or floor.
Phase 4: Dupline®Parking Guidance Software
Use an existing IP network or create a new TCP/IP network.
Determine the number of spaces to be monitored on each level and in total.
Require parking drawings in JPEG, PNG or PDF to be imported into the carpark software.
Seven pieces of SBP2MCG324s can be multi-dropped to a single SBP2WEB24 controller. To enlarge your
carpark system, the carpark server SBPCPY24 can operate with 10 SBP2WEB24 modules.

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All SBP2MCG324s have a unique ID number (SIN number). Information on available and occupied spaces
from the parking area are transmitted via the SBP2MCG324 to the SBP2WEB24 controller and then to the
software. In Carpark installations with less than 630 spaces (maximum 1 SBP2WEB24), the software is made
in the SBP2WEB24. In installations larger than 630 spaces (up to 10 SBP2WEB24s), the software is made in
the SBP2CPY24.
The carpark software can be programmed in advance and installed the very moment the physical
installation is finished.
Secondary Considerations
Different kinds of building automation components like the CO sensor, light sensors or movement sensors
could easily be built into a Parking Guidance System (PGS) system. By selecting the SBP2WEB24 controller,
the customer will have various numbers of flexible solutions at a lower cost.
It is also important to consider the installation costs, especially the necessary man-hours, but also the costs
of cables and wall boxes. We recommend the use of inexpensive standard 3-wire, unshielded 1.5 mm2(14-
16AWG) cables for the Carlo Gavazzi Dupline® Parking Guidance System. In order to reduce man-hours for
the installation, we have designed the sensor in such a way that it can be wired easily and quickly without
the use of screwdrivers. The bases/sensors are programmed from the SBP2WEB24 configuration tool when
they are mounted, wired and powered. The programming and calibration take just a few minutes to
execute for a complete lane. Just make sure that no cars are occupying the Carpark spaces during
calibration.

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One-Floor System Example
The diagram below is a theoretical example of how to implement 477 sensors on a single floor. Additional
floors would be configured, installed and brought online exactly the same way. Refer to section ‘Example of
a PGS for Multiple Floors’.
In the planning process, displays are positioned at the entrance and at each line.
The entrance display (A) will show all available spaces on the entire floor. The first branch display (B) will
show available spaces on that particular lane and the displays C and D will also show available spaces from
their lanes.
Design of the lanes can be made in many ways. We will always suggest an easy structure with a good
overview, which holds an extra margin for voltage drop, power consumption and any future installation.
In this example we have 6 lanes. Lanes 1, 2, 3, 4 and 5 each have two lines with 45 spaces per line, totalling
90 sensors per lane. Lane 6 has one line with 27 spaces.
The cable length has been calculated to 135 m (435 feet), so there is a margin for both voltage drop and
power consumption calculations.
Placement of the cabinets is in close proximity to the B, C and D displays providing us with the shortest
practical distance between the lanes.
Car Park Displays
The displays are all connected to the 3-wire Dupline® bus through the display-interface module that
converts Dupline® to Modbus. The displays can be connected to any of the lanes and show the demanded
available spaces. The programming of the displays takes place by using the SBP2WEB24 configuration tool.
Each of the displays requires its own power supply.

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Cabinets
The three cabinets C1, C2 and C3 should be mounted as shown in the scheme. If this is not possible, an
alternative placement should be found. It is important that the distance between the cabinet and the last
sensor on a line does not exceed a voltage drop of 3.5 V.
•C1 should contain power supplies for lanes 1, 2
oPower supplies for Displays A and B
oDupline® Master Generator SBP2MCG324 for lanes 1 and 2
oThe SBP2WEB24 controller and/or the main controller SBP2CPY24 (Use only the
SBP2CPY24 if more than one Carpark controller (SBP2WEB24) is used)
•C2 should contain modules for lanes 3 and 6
•C3 should contain modules for lanes 4 and 5
•Additional floors would be managed in the same way
Addressing Parking Spaces and Displays
All the bases upon which the sensors are mounted have a unique SIN number. The SIN numbers on the
bases do not need to be in consecutive order, but when each sensor is activated by the SBP2WEB24
configuration tool, it is important to activate the sensors in consecutive order. There are no limitations or
restrictions in placing sensors for different purposes right after each other. So, the installer can have
‘Normal’, ‘Disabled’ or ‘VIP’ spaces placed among each other. It is the same sensor that is used. The
difference is generated by the configuration tool.
Each display is connected to a display interface, which also has a SIN number. The display interface is
connected to the same Dupline® bus as the Carpark sensors. The display can be placed anywhere on the
Dupline® bus and on any CMCG in the system. The data to be showed on the display are available on any
Dupline® bus in the entire Carpark system.
In our example we do not have a separate display to show available spaces for disabled people. However, it
would be easy to add a separate display to the software, and we would recommend one display, one
display interface and one power supply as hardware for this extra feature. If, for instance, 20 spaces are
designated as spaces for disabled people, we will have to point out these spaces in the configuration
software to make them visible on the display.
Example of a PGS for Multiple Floors
Planning a Parking Guidance System (PGS) with multiple floors implies the same considerations as planning
one floor only. Determine displays, lanes, natural car flow in the Parking Guidance System and of course all
the other phases in the process mentioned at the beginning of this installation manual.
Cable lengths of the 3-wire Dupline® bus to supply sensors, displays and Ethernet runs must be carefully
considered.
After finishing the planning process, the installation can start. Pulling wires, install rails, mount sensors,
displays and cabinets. Using the SBP2WEB24 configuration tool, the installer can program and test parts of

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the installation before the entire installation is finished. When bases, sensors and CMCGs are connected
and powered, they can be tested and programmed before the rest of the system is completed.
Example:
Ground level:
4 normal lanes (lanes) with 76 spaces each and including 4 spaces for disabled people on each of the 4
lanes. 16 disabled spaces in total.
Level one:
4 normal lanes (lanes) with 72 spaces each.
Level two:
4 normal lanes (lanes) with 72 spaces each. Including 4 spaces with disabled spaces on each of the 4 lanes.
16 disabled spaces in total.
There are 304 spaces on the ground floor, 288 spaces on level 1 and finally 288 spaces on level 2. A total of
880 spaces, including 32 spaces for disabled people.
All the lanes including the disabled spaces are connected with a 3-wire Dupline® bus to their selected
SBP2MCG324 with a unique ID number.
Outside the PGS installation, three displays (Monument) show the number of available spaces on all three
levels and two displays to show available disabled parking spaces on the ground floor and level 2
respectively.
The three displays that show available spaces on all the ‘normal’ lanes (lanes) are connected to any 3-wire
Dupline® bus via a display interface module.
The two displays that show available spaces on all the disabled parking spaces are connected to any 3-wire
Dupline® bus via a display interface module.
In this example we have 12 lanes, which means we need 12 SBP2MCG324s one for each lane. It is possible
to manage with fewer SBP2MCG324s, but to keep the installation easy and logical, we use one
SBP2MCG324 for each lane.
Having 12 SBP2MCG324s, we need two SBP2WEB24 controllers and one SBP2CPY24 as Carpark Server.
Each of the SBP2MCG324s has a unique SIN number and is connected to its local CC, the SBP2WEB24.
Afterwards, the two SBP2WEB24s are connected to the CS (SBP2CPY24)to distribute the data to the
SBP2WEB24 controllers.
The best installations have a well-thought-out layout as too many displays may become counterproductive
due to information overload.
In level 2, we could have a display at the entrance that shows available spaces at this level only. Disabled
parking spaces are not included.
A simple display, L31, which shows a green arrow or a red cross, is placed at the entrance to level 2.
At each lane, we place a simple display with an arrow/a red cross to show available spaces in that direction.

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Installation of the PGS
Short Installation
In this section, the installer is given a tool to answer most questions that arise during the installation of
cables. Now the planning has ended, and we move forward towards the installation process starting with:
SBPSUSL45 Carpark Lane Sensor (Used in Most Installations)
Sensors must be installed at a distance of minimum 2.0 m (6.56 feet) and maximum 2.5 m (8.2 feet) from
the floor.
Use for instance cable trays to mount the sensors and Base A and the base holder SPB2BASEA to save
labour costs.
If the base holder is mounted directly on the ceiling, use the base holder SBP2BASEB (for pipe installation).
Make sure that Base A (B) is mounted correctly, so when the sensor is mounted it is pointing towards to
carpark space. For best performance it is recommended to mount the sensor in height of 2.5 m at the
entrance of the parking space. Refer to section ‘Placing the sensor’.
For aesthetic reasons, mount the sensors in a straight line and at the same height.

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Mount the sensors directed at an angle of 45 degrees to the ground with a deviation of maximum +/-5
degree vertically and maximum +/- 2 degree horizontally.
When mounting the wires into the push wire connectors on the sensors, cut the insulation carefully to
avoid damage to the conductor.
Cut only 1 cm (.394 or 25/64 inches) of the inner insulation on the conductor, when using a solid core cable
pressed into the push wire connector. Same procedure with a stranded wire. Cut the sheath to strip the
cable and then install a ferrule at both ends. Press the wire ends into the push wire connector. Refer to
section ‘General Installation’ for a more specific description.
SBP2MCG324 Carpark Master Channel Generator
The Dupline® Master Channel Generator (CMCG) SBP2MCG324 is used in all lanes to supply carpark
sensors, LED indicators and display interface modules.
Make sure that cable lengths or number of loads (sensors) are not exceeded when the modules are
connected to the CMCG. This means a maximum of 50 sensors in a line and 150 m cable, or a maximum of
90 sensors in total.
Use a double-sized power supply because of the pulsating output on the CMCG.
SBP2WEB24 Carpark Controller
The SBP2WEB24 controller can control a maximum of seven CMCGs. It can be installed in a cabinet with the
CMCG or separately. Installations with one SBP2WEB24 can have 630 sensors maximum.
SBP2CPY24 Carpark Server
Large installations with more than 630 spaces (or more than one SBP2WEB24 and up to 10 pieces
maximum), require the SBP2CPY24. This module controls the Carpark software, in which the installer can
perform bookings, schedules, alarms, trend curves etc.
Cabling
Use a 3-conductor 1.5 mm2(14-16AWG) unshielded single-core wire for the sensors OR
use a 3-conductor 1.5 mm2(14-16AWG) unshielded stranded wire with ferrules for the sensors.
Use a 2-conductor 1.0 mm2(14AWG) unshielded cable for power to the display interface module.
Use a 2-conductor 1.0 mm2(14AWG) unshielded cable for RS485 to the display interface module.
Cabinets
Place the cabinets according to plan.
Use large cabinets to take account of future installations and to avoid heat dissipation.

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Use a 1.5 mm2(14-16AWG) stranded wire with ferrules for internal wiring.
Programming
Carpark 3 must be programmed by the SBP2WEB24 configuration tool. This tool is used to locate the
Carpark modules and to connect them to the correct Lane, Line and Position. The configuration software is
a part of the SBP2WEB24.
Below, in section ‘Configuration software’, we show a programming example for a small lane with lines.
The Carpark 3 also includes Carpark software, from which the installer can perform the complete
monitoring and controlling of the carpark system. In installations with only one SBP2WEB24 module (also
less than 630 spaces), this software is available in the SBP2WEB24 module. However, in larger installations
with two or more SBP2WEB24s (up to 10 units or 6300 spaces), the Carpark Server SBP2CPY24 will be
needed.
This manual will not get around programming in details. Detailed programming, examples etc. can be found
in the software manual for the SBP2WEB24 controller, which is also available at
http://www.productselection.net/MANUALS/UK/cp3_manual.pdf
Only a few programming examples and screenshots will be shown in this manual.
Below in section ‘Carpark software’, we show an example of a programming procedure. The procedure
briefly describes the important elements and the steps to follow. It is important to follow the steps
described or to use the software manual to achieve a good result.
The Dupline®Fieldbus
General Information on the Fieldbus
The bus system that links the carpark sensors and display interface together is the Dupline® fieldbus. This
highly reliable, robust bus system has been proven in more than 150,000 installations worldwide in a wide
range of building automation applications such as water distribution, mining, railways and parking systems.
Dupline®Bus Features and Benefits
The strength of the Dupline® system consists of a unique set of features which enables elegant, flexible and
cost-effective solutions.
The Dupline® bus is a signal transmission system that reduces the need for wires, as compared to an
ordinary installation. Using only 2-wires, information can be transmitted from a distance of up to 2 km.
Many input and output modules are supplied from the same 2-wires. Both digital (On-Off) and analogue
data (e.g. temperature, light level, wind speed) are present on the bus at the same time. The data are
collected by the SH2MCG24 and then processed by the SB2WEB24.
The SH2MCG24 is the smart Dupline® bus generator that powers the Dupline® bus via the local bus and via
the terminals of the modules. All Dupline® slave modules have to be connected to one SH2MCG24 to be
part of the smart-building system.
The Dupline® modules in the smart-building system can be divided into two groups:

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- Decentralised modules: all the modules such as light switches, PIR sensors, lux sensors, decentralised I/O
modules that are mounted in the wall boxes or on the wall.
- Centralised cabinet modules: the modules that are mounted in 1-DIN or 2-DIN housings for Din rail
mounting.
All the decentralised Dupline® devices are connected to each other with a single two-wire cable. This cable
carries the communication signal that comes from the bus generator SH2MCG24. These two-wires carry a
DC low-voltage pulsating signal, and therefore, attention must be paid to keep the correct polarity of the
connection.
These unique Dupline® features provide considerable cost savings in many installations.
Dupline®Basic Elements
A Dupline® network consists of five basic elements: The controller, a master generator, input modules,
output modules and a two-wire cable. The controller is the brain of the system and collects all information
from its connected busses. The functions and the software are part of this controller. The master generator
controls the communication on the Dupline® bus. It sends out the Dupline® carrier signal and coordinates
all transmissions between input and output modules.
Input modules connect to contacts, voltages and analogue signal sources etc. and transmit this information
via the two-wire cable. In the parking system, the ultrasonic sensors can be regarded as input modules,
because they use the Dupline® bus to send status information to the master generator.
Output modules connect to loads such as lights, roller blinds, motor contactors and valves. In the parking
system, the master generator can be regarded as an output module controlling the display based on the
information received from the sensors via the Dupline® bus.

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Dupline®Bus and Smart Dupline®Bus
The smart-building system is based on a new protocol of the Dupline® bus. The protocol is called Smart
Dupline®.
Smart Dupline® implements a master-slave protocol running on standard Dupline® networks.
The concept of Smart Dupline® is based on the SIN – a Specific Identification Number which is unique for
each and every Dupline® module. The SIN is incorporated into the module during the production process
and cannot be modified.
The SIN code is printed on the product label like this:
SIN: 255.255.255
The SIN contains information about the type of Dupline® module (light switches, pir, I/O modules), the
firmware release and much more.
Smart-Dupline® enriches the previous Dupline® bus protocol with these features:
1) The master generator can program the network address ADD (1...250) in each device by means of the
Specific Identification Number.
2) The master generator can program the Dupline® standard channel addresses and all the other module
parameters by means of the Specific Identification Number.
3) The master generator can access all input and output module information by means of the Specific
Identification Number.
4) It is possible to manage double word information in a single message frame
5) A CRC control is implemented in request and reply frames. Should an error occur, the bus generator
resends the request until it receives a correct frame.
Analogue data is transmitted via the Smart Dupline® protocol without using digital I/O channels.
Dupline®Bus Including a 3’rd Wire
The parking guidance system uses an expanded version of Dupline® in which a 24-VDC power supply is
included as a 3rd wire. The reason being that a power supply is needed for the Carpark sensors on the bus.
The power supply must be synchronised with the Dupline® bus, and this is taken care of by the specific
carpark master channel generator (CMCG) for the parking system.
One carpark master generator, which drives one lane of the basic 3-wire Dupline® fieldbus, can manage up
to 120 inputs and 112 outputs. Because of the load and the voltage drop we recommend you not to install
more than 50 Carpark sensors on a line and no more than 90 Carpark sensors in total on a generator
(CMCG).
Dupline®Extra Features
The wide range of Dupline® products for building and industrial applications are fully compatible with the
parking guidance system, which makes it possible to extend the functionality to include such things as
control of lighting and ventilation based on the presence of persons, CO2 levels and time of the day. Yet
another option is to record the energy consumption in power distribution panels throughout the building in

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a central place by means of energy meters directly connected to the bus. These are just a few examples
among lots of combinations to accomplish the required solution.
System Description
In this chapter you will get an overview of the entire structure of the parking guidance system. There is a
short description of the basic elements of the system, followed by a description of the structure of a system
lane. Then it is described how the individual lanes can be linked together to create a large parking guidance
system with thousands of potential spaces. Also, a definition is offered for the network structure required
to link the system to a PC with the Parking Guidance software installed.
Basic Modules
Lane and vertical mounted sensors
Vertical sensor with a built-in LED indicator light, (8 colour, red, green, amber, yellow, light-blue, blue,
purple and white) SBPSUSL
45-degree sensor with a built-in LED indicator light, (8 colour, red, green, amber, yellow, light-blue, blue,
purple and white) SBPSUSL45
Vertical sensor 45 degree sensor
Each parking space must be equipped with one of these ultrasonic sensors, which detect whether or not a
car is present. These sensors are designed to be used together with the Carpark software and they enable
the Carpark operator to control the colour of each sensor. This is useful if the Carpark installation offers VIP
spaces, family spaces etc. There are two versions of this sensor: a 45 degree angled sensor with a built-in 8-
colour indication and one vertical with a built-in 8-colour indication. For best performance the 45-degree
sensor is recommended to be mounted in height of 2.5 m at the entrance of the parking space.
This is the prevalent sensor type because of the installation costs and installation time.