CARLO GAVAZZI Carpark 3 Design And Installation Manual

CP3 version 3003

Table of contents

List of Abbreviations Used in This Manual ........................................................................................................ 6

Introduction: ...................................................................................................................................................... 6

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Planning a Dupline

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

Secondary Considerations ........................................................................................................................... 11

One-Floor System Example ............................................................................................................................. 12

Car Park Displays ......................................................................................................................................... 12

Cabinets ....................................................................................................................................................... 13

Parking Guidance System (PGS) ........................................................................................ 7

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Parking Guidance Software ............................................................................................ 10

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

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The Dupline

Fieldbus ...................................................................................................................................... 17

General Information on the Fieldbus .......................................................................................................... 17

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Dupline

Dupline

Dupline

Dupline

Dupline

Bus Features and Benefits ............................................................................................................ 17

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Basic Elements .............................................................................................................................. 18

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Bus and Smart Dupline® Bus ......................................................................................................... 19

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Bus Including a 3’rd Wire .............................................................................................................. 19

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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 wind­blown 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 mm

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cable.

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 (1.5mm
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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). There must be a maximum of 90 sensors per generator. If the

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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

Use an existing IP network or create a new TCP/IP network.

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Parking Guidance Software

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

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of cables and wall boxes. We recommend the use of inexpensive standard 3-wire, unshielded 1.5 mm

(14­16AWG) 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

o Power supplies for Displays A and B
o Dupline® Master Generator SBP2MCG324 for lanes 1 and 2
o The 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)
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.

to distribute the data to the

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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 mm

Use a 2-conductor 1.0 mm

2

(14-16AWG) unshielded stranded wire with ferrules for the sensors.

2

(14AWG) unshielded cable for power to the display interface module.

Use a 2-conductor 1.0 mm

2

(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 mm

2

(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 8­colour 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.

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The carpark sensor consists of two parts: the sensor itself and a base holder to be mounted on the ceiling,
cable tray or installation box. The sensor has a small cable with a male RJ12 connector that must be
plugged into the female RJ 12 connector in the base part. The sensor is detachable from the base, which
makes replacement of the sensor easy. Once the sensor is locked to its holder, it is secured by a safety lock.
The sensor is not delivered with the base. The base must be ordered separately.

LED Indicator

LED indicator with eight colours built in (red, green, amber, yellow, light-blue, blue, purple and white),
Dupline® bus powered SBPILED

The LED indicator consists of three bright RGB diodes implemented in a housing of transparent
polycarbonate. It uses the same base holder as the sensors. The LED indicator has a small cable with a male
RJ12 connector that must be plugged into the female RJ12 connector on the base part. LED indicator is not
delivered with a base module. The base must be ordered separately.

LED indicator

Base A and Base B

Base A, low base with SIN number SBPBASEA

Base B, tall base with SIN number SBPBASEB

Base A is a low base used for rail mounting. The cable is inserted from the top of the base and the
knockouts are used for mounting in the rail.

Base B is a tall base used for mounting on the ceiling. The knockouts on the side of the base are for pipes
with the 3-wire cables.

Both base types can be used together with all Carpark 3 sensors or LED indicators. The base has a 2*3-wire
connection for d+, d- and POW. The base also has a female RJ12 connector, which must be connected to
the sensor or LED indicator. Moreover, it has a PCB containing the unique SIN number for identification
when connected to the Dupline® bus.

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The base is not delivered with the carpark sensor or LED indicator, but must be ordered separately.

Base A Base B

Carpark Master Generator (CMCG)

The purpose of the CMCG is to generate the 1-kHz Dupline® carrier signal that enables all the devices on
the bus to communicate with each other. Furthermore, it synchronises the power supply for the sensors
and LED indicators with the Dupline® bus signal in order to achieve a 3-wire bus with communication and
power. Finally, it acts as a Smart- Dupline® interface in order to deliver the sensors' status data to the
SBP2WEB24 controller. The CMCG does not have galvanic separation between input voltage and output
voltage, so use a power supply with galvanic separation and a 28VDC on the output.

Each Carpark Master Generator SBP2MCG324 can operate with 90 carpark sensors in total, and a maximum
of seven SBP2MCG324s can be connected together to one carpark controller, the SBP2WEB24. This equates
to a maximum of 630 carpark sensors. This number can be expanded by using the carpark server
SBP2CPY24. See section ‘Carpark Server’.

Carpark Controller

The carpark controller is based on a central CPU, the Sx2WEB24, which is a Linux-based embedded PC that
manages all the smart functions. It is programmed by means of software, the SBP2WEB24 tool. The
SBP2WEB24 has the Ethernet communication capability to be remotely controlled and monitored by smart­devices/PCs, and it is also a data logger, which can record any value/event coming from the many busses to
which it can connect (Wireless and Dupline® busses, two RS485 ports, Ethernet). This master unit is also
supplied with an SD-card and USB port to upload/download data and system configurations.

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Each SBP2WEB24 can operate with up to seven SBP2MCG324s in a network.

The SBP2WEB24 is the brain of the system. It collects all pieces of information from the buses to which it is
connected. All field devices such as light switches, input/output modules and carpark sensors are
connected to the SBP2WEB24 via the SBP2MCG324 Dupline® master generator.

Furthermore, the SBP2WEB24 has a built-in web server and includes Carpark software to enable the
operator to control and monitor the entire carpark installation. Booking, schedules, trend curves, alarms
etc. are just a few of the parameters that are available.

Carpark Server

The SBP2CPY24 allows users to manage distributed installations. In each location one SBP2CPY24 unit is in
charge of gathering data from the connected devices (Carpark sensor and Carpark LED indicators) and store
them inside its local DB, allowing information from many plants to be centralised in a single database and
Web-Server, without the need of a dedicated PC. Furthermore, the SBP2CPY24 has built-in Carpark
software from where the installer can control and monitor the entire carpark installation. Booking,
schedules, trend curves, alarms etc. are just a few parameters that are available.

Monitoring and data management of up to 10 distributed installations of SBP2WEB24. Referring to section
‘Carpark Master Generator’ each SBP2WEB24 can handle 630 carpark sensors. By using the SBP2CPY24, we
can expand the carpark installation by 10 SBP2WEB24. That is 6300 carpark sensors in total. This number
can be even bigger using a different type of carpark server. If this is the question, please contact your
nearest Carlo Gavazzi sales office for further information.

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Carpark Displays

Arrow SBPDISA

Arrow+Heat SBPDISAT

Arrow Left+Disabled Right SBPDISALH

Arrow Left+Disabled Right + Heat SBPDISALHT

Arrow Right+Disabled Left SBPDISARH

Arrow Right+Disabled Left + Heat SBPDISARHT

Digit2 SBPDIS2

Digit2 + Heat SBPDIS2T

Arrow Left+Digit2 Right SBPDIS2AL

Arrow Left+Digit2 Right + Heat SBPDIS2ALT

Arrow Right+Digit2 Left SBPDIS2AR

Arrow Right+Digit2 Left + Heat SBPDIS2ART

Digit3 SBPDIS3

Digit3 + Heat SBPDIS3T

Arrow Right+Digit3 Left SBPDIS3AR

Arrow Right+Digit3 Left + Heat SBPDIS3ART

Arrow Left+Digit3 Right SBPDIS3AL

Arrow Left+Digit3 Right + Heat SBPDIS3ALT

Arrow Right+Disabled Left+Digit1 SBPDIS1ARH

Arrow Right+Disabled Left+Digit1+ Heat SBPDIS1ARHT

Arrow Left+Disabled Right+Digit1 SBPDIS1ALH

Arrow Left+Disabled Right+Digit1+Heat SBPDIS1ALHT

Digit4 SBPDIS4

Digit4 + Heat SBPDIS4T

Text display SBPDIS9

Text display + Heat SBPDIS9T

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The displays are connected to the Dupline® bus via the display interface module SBP2DI48524. The displays
operate with RS485 Modbus RTU protocol and shows available spaces using bright green arrows or/and
bright white digits. The displays are programmable from the SBP2WEB24 configuration tool and can be
programmed to show ‘running or steady arrows’ pointing ‘up, ‘down’, ‘left’ or ‘right’. The text display has
the option to show a user-defined text of maximum 9 digits for either a ‘occupied’ or ‘vacant’ situation. In
situations where low ambient temperatures are present (lower than -20 degree Celsius), we recommend
using the version where the heat element is built in. This heat element will have a working display down to

-40 degree Celsius.

The number of displays in an installation is free, until of course, the numbers of addresses in the
SBP2WEB24 are used.

Carpark Display Interface Module

Dupline® to Modbus RTU converter SBP2DI48524

The carpark interface module is used to connect the Carpark displays directly to the Dupline® bus. Each
module has a unique SIN number and must be programmed by the SBP2WEB24 configuration tool. Each
display must have its own interface module and can be mounted up to 300 m from the display because of
the RS485 connection.

System Structure

At first sight, you may presume that it is a complex task to design a Dupline® parking guidance system for a
parking facility with hundreds or thousands of parking spaces. But when you understand the basic structure
of the system, you will realise that it is simply composed of a number of identically structured system lanes
linked together to create a big system. This chapter begins with a definition of the structure of the basic
system lane. Then we describe how the lanes can be linked together to create the overall system, including
a network for central parking facilities monitoring software.

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Determination of Lane, Line and Position

We use the terms Lane, Line, Position to determine the logistics of the carpark sensors in a carpark
installation.

- The word lane in our description refers to the physical lane in a real carpark. It can be a long lane or

a short lane and can consist of few or many sensors

- The word line is a technical term for a string we use together with the lane. A lane can have several

lines with up to maximum 50 sensors each. The lines can go in different directions from the
generator, like a star connection

- The word position is the placement of the sensors in each line

In the schematic drawing below is shown an example of a generator connected to several lines. The sensors
are all named pos.1, pos.2 etc. on each new line. Just like in the software where the sensors will be named
1,1,1 – 1,1,2 etc. Lane 1, Line 1 and position 1 and so on.

We can connect 90 Carpark sensors to a generator and maximum 50 sensors on a line.

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In the drawing below, a single carpark lane is shown. A lane refers to the physical lane in the carpark
building. The lane can be long or short with few or many cars. That depends completely on the structure in
the building.

In this example we have a Lane with 76 spaces on each side.

To obey the rules of maximum 50 sensors on a line and maximum 90 sensors on a generator, we decide to
split up the lane in four equal parts with 38 sensors in each part, and thereby have 4 lines in one lane.

The generators must be placed in a way that reduces unnecessary wire length. Extra wire increases the
voltage drop and thereby reduces the number of sensors in the installation. Please refer to the section
‘calculation’.

In this example the two generators are placed in the opposite ends of the lane and supply lines 1.1-1.2 and

1.3-1.4, respectively. In total, each generator supplies 2*38=76 sensors.

Due to a good balance in the system, it makes sense to equal the load on all four lines as mentioned in the
above example.

The Carpark Master Generator with DC Power Supply

SBP2MCG324 Carpark Master Generator generates the Dupline® carrier signal and 28VDC power supply
synchronization needed to create the 3-wire bus linking all the sensors and display interfaces in the lane
together. In a given lane you will always find one - but only one – carpark master generator. The CMCG can
operate with maximum 50 sensors in a line and maximum 90 sensors in total.

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Sensors

Each parking space belonging to a lane/line needs a sensor to detect the presence of a car. Each sensor
must be connected to the 3-wire carpark bus, assigned by the SBP2WEB24 configuration tool, to be able to
transmit the sensor status (occupied/not occupied/disabled/VIP/etc.). For best performance it is
recommended to mount the 45-degree sensor in height of 2.5 m at the entrance of the parking space. The
built in LEDs will clearly indicate to the drivers if the parking space is available or not. Other sensor/LED
indicator solutions are available and are further described under ‘General Installation – Selection of sensor
type’.

Display and Display Interfaces

The display interface is a small compact module with two purposes. Converting Dupline® to Modbus and
identifying the display by the SIN number. A display interface is needed for each display.

The display shows the number of available carpark spaces and or the direction. The display can be mounted
anywhere on the Dupline® bus and be programmed to show the number of available spaces the installer
decides. Totally, lane by lane, disabled, VIP or a combination of the different options together.

Combining Lanes to a Complete System

When the lanes are defined, we use the SBP2WEB24 controller and the SBP2CPY24 carpark server to
combine and upscale the carpark system from 100 to 1000 or even 10.000 spaces.

Each SBP2WEB24 can operate with maximum seven SBP2MCG324s. That is 7*90=630 spaces in total. By
using the Carpark server SBP2CPY24, we can operate with ten SBP2WEB24s, so we have 10*630 sensors
which means 6300 spaces in total. If additional spaces are needed, please contact Carlo Gavazzi for further
information.

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Software and Web server

The last part is to program the system by using the SBP2WEB24 configuration tool. In systems with more
than one SBP2WEB24, the installer must program each SBP2WEB24 independently. In smaller systems
(below 630) the web server in the SBP2WEB24 can monitor and control all the sensors and other Dupline®
products. In larger systems the web server in the SBP2CPY24 controls and monitors all the I/O s in the
entire system.

The configuration tool also has the carpark software built in. The installer can design the carpark with
drawings, see alarms, see historical data, vacancy space by space or in lanes, occupancy data and many
other features.

Status view:

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Alarm table:

Occupancy trend:

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System Requirements

Operating Systems: Windows 7, Windows 8, Windows 10

Browser recommended: Chrome

Standard Desktop PC or Laptop with Ethernet / WIFI

Hard Disk: Minimum1 GB of available space

Display: 1024 x 768 high colour, 32-bit (Minimum); 1600 x 1200 high colour, 32-bit

Suggested: 24” monitor, with a resolution capable of 1600 x 1200 pixels in high colour.

General Installation

Cable

The 3-wire cable used in the Carpark system supplies both Dupline® signals and power to the sensors.

To avoid voltage drop at the far end of the cable or to avoid reflections in the cable, we require a cable that
meets the following specifications:

3-conductor, 1.5 mm
mount a ferrule on each wire end, because the connections on the sensors are all ‘push connectors’.

2

, (14-16AWG), non-shielded, single-core. If a multi-core cable is used, it is essential to

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3 * 1.5 mm

3 * 1.5 mm

2

(14-16AWG), non-shielded, multi-core wire with ferrule

2

(14-16AWG) single-core wire

Practical Cabling Techniques

The following issues must be taken into consideration when installing the Dupline® bus cable.

• Do not mount the Dupline® bus cable close to high voltage installations such as:

• Motors

• High voltage cable

• Inverters

• Breakers

• Make sure that water cannot penetrate the Dupline

®

bus cable or junction boxes. Water can cause poor

connections and random activations of the sensors

• If the cable is installed close to high voltage cables or equipment, use a shielded cable

Selecting the Sensor Type

Depending on the installation, we must decide which sensor to use. In most installations we will use the 45­degree angled sensor. For best performance it is recommended to mount the 45-degree sensor in height of

2.5 m at the entrance of the parking space. If there are obstacles lower than the sensor, a calibration of the
sensor can be difficult. Before calibration, the user is asked to enter the distance (from sensor to floor. 90

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degrees). This is to avoid calibration errors. If the LED in the sensor returns with green steady signal (no cars
in the parking space), the sensor is ok. If the sensor is red or blinking red, check the distance once more or
replace the sensor. Further description of the calibration procedure in written in the software manual.

In installations where the sensor is to be mounted directly above the car, please use the vertical sensor
SBPSUSL. The SBPSUSL has up to 8 different freely selectable colours.

The vertical solution with external LED indicator represents a cost reduction through the number of passive
LED indicators. One LED indicator can be programmed as OR gate to monitor x-numbers of sensors, and if
all the monitored sensors are occupied, the LED indicator will change colour to red for occupied. If one or
several sensors are available, the LED indicator will show the colour for available space.

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Mounting height of sensor in m

Safe detection distance in m

2.0

1.4

2.1

1.5

2.2

1.55

2.3

1.6

2.4

1.7

2.5

1.8

Placing the Sensor

When installing sensors, it is important to investigate what kind of technique is the best in the specific
installation.

In most installations, the lane-mounted sensor will be preferred because of the reduced cost of labour and
material used. In some circumstances the vertical sensor is preferred, but that will be a decision made by
the owner and the architect of the building.

The 45-degree sensor must be mounted in the lane in front of the carpark space.

For best performance it is recommended to mount the 45-degree sensor in height of 2.5 m at the entrance
of the parking space.

Sensor mounted in front of the parking space Safe detection distance

The Safe detection distance is important to obtain a reliable detection of the car. If the installer does not
obey this information, the sensors might not detect correctly.

*Table for combination between sensor height and distance to car

The aesthetic point of view must also be taken into consideration when mounting the sensor.

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Place the base connectors so they are

Place lane-mounted sensor correct outside the carpark

Make sure that the base is mounted so that the connectors in the base are pointing towards the carpark
space. See the pictures below. See also under section ‘Position of sensors’.

space in an atheistic manner.

The vertical carpark sensor must be mounted in the middle of the carpark space pointing directly down to
the floor. The sensor must be mounted in an aesthetic manner maximum 4 m from the floor.

In both choices it is important to obey the rules of maximum +/-5-degree vertical deviation and +/-2-degree
horizontal deviation for the lane mounted sensor. See section below: Positioning of sensor.

Please install the sensor according to the datasheet.

In the planning stage, decisions must be made as to where and how to mount the sensors. The decisions
based on physical conditions will include:

pointing towards the carpark space

• On the ceiling

• On a cable tray

• As a lowered sensor

Each technique can be used, but installation time, price and aesthetic considerations must be taken into
account.

In our experience, cable tray installation is a very quick installation. In addition, it is cheap (in Europe
because of the labour) and it has a nice (aesthetic) appearance. In Asia experience has shown that
customers prefer the lowered sensor installation.

Sensors mounted on a cable tray

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Sensors mounted on the ceiling

Lowered sensor installation

Positioning the Sensor

The lane mounted sensor must be installed pointing at a 45-degree angle towards a hard and straight
surface. Rubble, sand and grass cannot be used as surface. If water and snow are covering the surface, the
sensor cannot detect if a car is present or not. If a car is covered with snow, the sensor cannot detect the
car. The sensor angle must be maximum +/-5-degree vertical deviation and maximum +/-2-degree
horizontal deviation. Make sure that the base is mounted correctly so that the sensor is pointing towards
the carpark space when mounted to the base.

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The vertical sensor must be installed pointing straight down to a hard and straight surface. The angle of the
sensor must have maximum +/-5-degree vertical deviation.

Both type of sensors, sends out a 40 kHz ultrasonic signal, and it is important that the receiver inside the
sensor is able to detect the returning signal without problems. If the angle is difficult or the surface is of
poor quality, the signal can be interrupted resulting in the sensor flashing red.

The lane mounted sensor must be mounted correctly in front of and in the middle of the space, at a height
of 2.5 m, to ensure a perfect and reliable signal.

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The vertical sensor must be mounted correctly in the middle of the parking space to ensure a perfect and
reliable signal.

Wiring the Base

The wires can be connected to the base connectors without the use of tools because the ‘push connector
technique’ is used. Just press the stripped single-core/ferrule wire into the connector and it will be
perfectly connected on the inside.

Mount the wire by pushing the wire into the connector

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To release the wire from the push connector, press and then pull the wire.

Leave 20 cm or 8 inches of extra wire for making the connections to the base. This extra wire not only
makes it easier to connect the sensors, but it also prevents stress to the connections due to extreme radii.

Mounting the Sensor in the Base Holder

Connect the sensor to the base with RJ12 connector

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The sensor must be mounted into either base A or base B.

Step 1: Place the sensor with the vertical mark so it is pointing towards the tip of the triangle on the base.

Step 2: Twist the sensor clockwise until the vertical mark is positioned at the rear end of the triangle. The
sensor is now fixed to the base.

Step 3: The sensor can be sealed to the base by inserting a screwdriver in the slot on the side of the sensor.
Turn the screwdriver anti-clockwise for sealing

Step 1 Step 2:

Step 3

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Releasing sensor from Base:

Step 1: Use a small screwdriver and put it in the vertical slot on the base

Step 2: Turn the screwdriver clockwise to detach the sensor from the base

Step 3: Twist the sensor anticlockwise.

Step 1 Step 2

Step 3

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Mounting the Display and Display Interface Module

Display Interface Module

The display interface SBP2DI48524 is a 2-din rail ‘black box’ that converts Dupline® to Modbus. It can be
installed near the display or in the cabinet (maximum 300 m from display) with the other cabinet modules.

The interface module is 24 VDC supplied by an external supply. Do not power the interface module with the
pulsating 28 VDC from the Dupline® bus. The interface module must be mounted with Dupline® bus signal
D+ and D- from any Dupline® lane in the carpark system. The output is a RS485 and 24VDC output which
must be connected to the yellow and green wire and brown and white wire on the display.

Display

The display has 4 wires that must be connected to 24VDC (Brown, White) and RS485 (Yellow +, Green -)
respectively to the display interface module. See above.

There are a large variety of displays, and for example, the data regarding dimensions and power
consumption can be found in the datasheets. The correct size of the power supply must be chosen
accordingly to this information.

The display must be mounted with the supplied hammer nuts.

The display’s aluminium frame has a slit where three 6 mm nuts for mounting are placed. By using the nuts,
the installer can install the display in the ceiling or on the wall.

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If the display is mounted in environments with temperatures lower than -20 C degrees, we recommend
using the display variant SBPDISxxxT.

The ‘T’ indicates a built-in heating element that ensures an operational temperature if the temperature
drops below -20°C.

Cabinet Installation

The cabinet(s) for all the DIN rail-mounted Parking Guidance System modules is (are) suggested to be
placed in the middle of the system in order to have a uniform load. It is also an advantage (because only
few cabinets are used) and the length of the cable to the sensors is reduced. This subject was discussed
earlier in the planning process. See section ‘Phase 3’. The cable length can be calculated as shown under
the section ‘Calculation’.

Reducing the length of the cable to the sensors makes it possible to mount more sensors on the same
Dupline® bus. (But maximum 50 sensors in a line and maximum 90 sensors to a CMCG).

If required, the cabinet(s) can be installed away from the system or simply at the end of the system. If the
rules mentioned in section ‘Calculation’ are ignored, it is important to perform a load and voltage drop
calculation. See the same section, ‘Calculation’.

Cabinet Modules

The cabinet modules are din-rail mounted. The modules we will use are listed below.

Basic modules:

Carpark master generator SBP2MCG324

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This example shows one SBP2WEB24

Carpark controller SBP2WEB24

Power supplies any approved galvanically separated DC power supplies with

28VDC output

Optional modules:

Carpark server SBP2CPY24 (if the number of spaces exceeds 630 spaces or 2 or

more SBP2WEB24 modules)

Carpark display interface SBP2DI48524

Cabinet Structure

The selected cabinet must always be an approved cabinet according to the regulations of the building or
country for that specific installation. Refer to planning process in section 1.

Use a cabinet with enough space for heat dissipation so that overheating caused by power supplies and
power consumption is prevented.

Place the modules in lanes and use cable channels to maintain the aesthetics of the cabinet and to keep it
in order. If more than one wire is connected in a terminal, make sure that the same connector square is
used and/or use ferrules to ensure a good connection in the terminal.

and two SBP2MCG324 with two power
supplies. To the left we have a display
interface module and one SBP2CPY24
that is powered from one power
supply

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In this example we have on

1 Top row

2 Second row

3 Third row

the top row three 2Amp
power supplies for the
SBP2CPY24 and the
SBP2WEB24 also on the top
row and the SBP2WEB24 on
row two. Additionally, we
have five SBP2MCG324s on
row two powered from five
5amp power supplies on
row two and three
respectively. Also, we have
fuses and an Ethernet
switch on row three and a
cabinet power switch on
row four.

Example of a simple wiring in a cabinet

4 Fourth row

The SBP2WEB24 on row
one is for light control and
HVAC equipment.

The drawing below shows an example of a lane including power supplies and display interface.

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Interconnections of Cabinets

The CMCG modules in the cabinets are connected to lanes containing sensors and displays. But to make the
system complete, we must interconnect the cabinets with each other.

The interconnection is done by making a connection using the RS485 on the CMCG from cabinet to cabinet.
The RS485 connection between the SBP2MCG324 can achieve a length of maximum 600 m. When the
connection is complete, all the data are available on any bus in the system.

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Each of the SBP2WEB24 controllers has an Ethernet connection for the network. Keep in mind that the
Ethernet cable must not exceed 100 m without the use of repeaters, so if distances are long, use an
Ethernet switch to meet this requirement..

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Software

This section will briefly discuss the configuration software and the carpark software. A more detailed
information and guide can be found in the software installation manual. Both manuals are available on:

http://www.productselection.net/MANUALS/UK/cp3_manual.pdf

http://www.productselection.net/MANUALS/UK/sx_tool_manual.pdf

In the following, we will discuss the configuration of the carpark modules including assigning the sensors,
LED indicators and display interfaces to the proper lanes and lines. Calibration will be discussed as well.

Configuration Software

When all the modules are connected to the bus and the power is on, the next step is to start configuring
the carpark modules to the respective lanes, lines and positions. The configuration software can be found
here: http://www.productselection.net/MANUALS/UK/confuguration_manual.pdf

Configuration and Assigning Carpark Sensors

Step 1: Select the carpark controller for the specific installation you want to work on

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Step 2: When the controller is connected, select ‘Modules’ and ‘Scan networks’. Scanning the networks can
take minutes depending on the number of modules and CMCGs connected to the SBP2WEB24. (Maximum
630 carpark sensors)

Step 3: Define the lanes by pressing “Add Location Lane” on the toolbar to the right

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Step 4: Define the Lanes and Lines according to the physical layout by pressing “Add Location Line” on the
toolbar to the right.

When the lanes and lines have been defined, the next step is to assign the carpark sensors to the correct
locations in the lanes and lines respectively.

Option 1: Drag and drop the sensors you want to assign to a specific line by using the SIN number.

Option 2: Assign addresses to the sensors manually by pressing the assign button on each sensor in
consecutive order. Option 2 is the easiest and fastest way to assign the sensors and is recommended for all
types of installations.

Option1:

The picture below is an example of lining the sensors by drag and drop.

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When the sensors have been dragged from the list on the left side to the specific line on the right side (see
picture above), the installer must manually place the sensors in consecutive order by positioning them
internally relative to one another. This can be done by clicking on each sensor icon and enter the Lane,
Line, Position number manually.

Option two:

Define the lines as the above picture shows and then select the ‘Multi line Addressing’ mode in the toolbar
on the right side.

This enables the manual sensor assign mode and opens the window below. Using this option, the installer
just needs to select the “Number of modules” in each line and then manually assign each sensor by
pressing the local button on the sensors in consecutive order. See the guide below.

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Select the number of sensors which must be assigned for the lines and also select a time delay. Default is

10 sec.

Press ‘Confirm’ to accept and to start the assign sequence.

LED feedback from sensors: Assigned sensors without Lane, Line, Position address ( see above screenshot)
will start flashing yellow slowly (1Hz)

Go to line 1 and press the button on the first sensor. This sensor will get position 1 in line 1.

LED feedback from sensors: Sensor 1 will change from blinking yellow to blinking green (3Hz) for 3 sec. and
then change to blinking green slowly (1Hz). The other sensors continue to blink yellow (1Hz). Continue
pressing all the sensors in consecutive order in line 1.

Press the button on the last sensor in line 1

LED feedback from sensors: All the sensors will turn green for 10 sec (preselected time delay, defined in
assign mode. See above). This time delay is adjustable (default 10 sec) and indicates that line 1 assignment
has ended and that you can start line 2. After the time delay has expired, the LEDs on the sensors from line
2 and forward will start flashing yellow (sensors not yet configured), and you can continue assigning the
sensors to the correct positions until all sensors has been assigned.

It is very important to assign the sensors in consecutive order, so the sensors are referring to the correct
physical position on the line. If this rule is not observed, the sensors do not refer to the correct position and
the assign sequence must be repeated until it is correct.

When the assignment has ended, remember to save and upload the configuration to the carpark controller.

Assigning Display Interface Modules (DIM)

The DIM is not assigned in the same way as the sensor, but in configuration mode, the DIM must be
assigned a unique name and a display type (2 digits, 3 digits etc.).

To find the correct DIM in the list, use the SIN number and compare this with the physical SIN number on
the module.

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Select the DIM in the list below by clicking on the icon

Select a proper name for the display. E.g. ‘Total floor 1’ or use the automated computer generated name as
default. In this case: K9 SBP2DI48524

Select under ‘Properties’ – ‘Available displays’. In this example, a display with arrow and red cross is
selected: SBPDISA.

Repeat this procedure until all the DIMs are named and assigned to a display type.

Save the work and upload data to the controller.

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Calibration

When the sensors, LED indicators and display interfaces have been assigned, the next step is to calibrate all
the sensors. Please keep in mind that calibration can only take place when the carpark space is empty.

Automatic calibration

Before a calibration ( or at least the first time the sensors are calibrated), enter the distance between
sensors and floor. The distance is measured from the sensor head to the floor. Please follow the below
procedure:

Select sensor (or sensors) to be calibrated

Select “Mounting” (Lane or Over the Car) for each sensor

Select “Distance” (measure the distance vertically from sensor to floor) and insert the
distance in m for each sensor

Select “Write settings”and enter the data of the selected sensor/ sensors

When Mounting and Distance are completed, the next step is to calibrate the sensor or sensors:

Select sensor or sensors to be calibrated

Press “Start calibration” under Automatic mode

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o Response from sensors: The selected sensors will start flashing yellow for 5 sec. After 5

sec., they will start flashing green for 3 sec. After the 3 sec., the sensors will turn steady
green

Note: If there are many sensors to calibrate, it is possible to select sensor type and distance for multiple
sensors in the below menu named “Multiediting”.

Select sensor (or sensors) to be calibrated (See section “Automatic calibration”)
Select the menu “Multiediting”
Select “Mounting” and “Distance” for the selected sensors and then “Apply”
Select “Write settings” to enter the data of the selected sensor or sensors (See section “Automatic
calibration”)

When “Multiediting” is completed, the next step is to calibrate the sensor or sensors. (Same procedure as
under section “Automatic calibration”)

Select sensor or sensors to be calibrated
Press “Start calibration” under Automatic mode

o Response from sensors: The selected sensors will start flashing yellow for 5 sec. After 5

sec., they will start flashing green for 3 sec. After the 3 sec., the sensors will turn steady
green

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Manual Calibration

The manual calibration is performed in situations where the installer needs to calibrate only one or a few
sensors. This is often the case in situations where a single sensor has become defective for an unknown
reason.

The manual calibration also makes it possible for the installer to press a button on the sensor that executes
the calibration procedure.

Follow the same basic procedure as under “Automatic calibration” for the 3 first steps.

Select sensor (or sensors) to be calibrated
Select “Mounting” (Lane or Over the Car) for the sensor(s)
Select “Distance” (measure the distance vertically from sensor to floor in meter) and insert the
distance for the sensor(s)
Change the red cross on “Enable push button for calibration” to green checkmark and press “Send
command”
Go to the sensor and press the button

o Response from sensor: Sensor will start flashing yellow slowly in 15 sec. The sensor changes

to fast yellow flashes for 5 sec. and finally it calibrates in 3 sec. with flashing green LEDs

Select “Write data” to enter the data of the selected sensor or sensors

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Carpark Software

When the configuration is complete, we move to the carpark software part where we can import drawings,
make alarms, analyse trend curves, book and unbook carpark spaces etc. In this manual we will only show a
small part of all these functions while referring to the carpark software manual, which can be downloaded
here: http://productselection.net

Basic Setup

The screenshot below shows a carpark software before it has been configured. It is important that the
installer/programmer starts working with the carpark software in the right order to get the best result.

Always start from left to right on the toolbar.

- ‘User’. Settings for language settings, date/year, and so on.

This setup is a requirement for running the SBP2CPY24 with the correct date and time format
(European/US)

- ‘System Settings’. For selecting LAN, modem, clock and firmware.

This setup is a requirement for LAN or Modem settings together with the clock. Clock is needed for real­time stamp and for internal use of the clock. Always check for latest firmware release.

- ‘Settings’. For selecting general park settings, such as account, status and category setup.

The first three menus must be completed because the settings have an impact on the future database in
the carpark software. The last two menus (Group Settings and Scheduler) can be filled out later. They are
used for booking, sending data to emulated displays, etc.

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- ‘Drawings’ adds drawings and designs the carpark structures.

Optional. In the drawings menu, the installer can build up the entire structure of the carpark installation.
Drawings can be imported and icons can show the status of each space, such as available, occupied,
disabled, VIP etc. Physical displays with steady or moving arrows can be assigned and configured, and
emulated displays can be configured to show a specific status, such as the number of occupied spaces or
VIP spaces in one floor or the entire system.

- ‘Layout’. Option for personal screen view. E.g. Status page and alarm page as the preferred screen

view.

This menu is optional but can be used to personalise each user’s screen layout. Show the menus as cascade
or in layers. Decide which menus shall be in focus etc.

- ‘Alarms’. See historical alarms and acknowledge alarms. It is also possible to set different alarm set

points for groups or individual carpark spaces.

Optional.Useful if, for example, you want to set the alarm if predefined parking times are exceeded.

- ‘Status’. A view of the entire system shown as bar graphs or as a table.

Optional, but provides the operator with useful information of the occupancy on each floor or the entire
system

- ‘Reports’. For occupancy and space statistics.

Optional, but useful for historical investigations of space and area statistics, such as occupancy, available
spaces and most used/unused spaces, either as a graph or as a table.

- ‘Commands’. For example, the sequence setup to control a gate when the carpark is occupied.

Optional but useful to control a gate for example when a floor (or the entire system) is occupied.

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System Calculation

Before any installation, it is important to make sure that the system with cables, sensors, LED indicators etc.
are correctly mounted according to load and voltage drop. We will discuss some basic rules to adhere to
this so that the outcome will be the best-designed installation in all circumstances.

Rules of Thumb

- Maximum 90 carpark sensors connected to a CMCG

- Maximum 50 sensors in a Line

- Use always unshielded 3*1.5 mm

- Use maximum 3 m between each sensor / LED indicator. (If the sensor is lowered from rail or

ceiling, it is recommended to make the connection in the ceiling box and only pull one 3-wire to the
sensor/LED indicator, instead of pulling the cable down and then up again. See drawing below.

- Maximum 60 m cable from the cabinet to the first sensor in line when cable type3*1.5 mm

used.

2

cables (stranded or solid) for the sensors and LED indicators

2

is

Note: It is recommended to make the connection in the ceiling box instead of pulling the wire from the
ceiling to the sensor and back to ceiling again. This is to avoid a long cable distance.

Example:

If the lowered pipe from ceiling to the sensor is 0.5 m, the cable between the sensors will be increased by
2*0.5 = 1.0 m.

Using the table below, we can see the result by increasing from 2.5 to 3.5 m using 50 sensors in a line.

Changing the distance between the sensors is not a big problem as shown in Table 1 below. However,
changing the number of sensors is more significant. If there are 2.5 m between each sensor, the table
shows a decrease from 130 m to 81 m going from 40 to 50 sensors. That is a reduced cable length of 60%.

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Calculation

If you are searching for different installation methods, please follow the calculation examples below.

For maximum 90 sensors connected to a CMCG and maximum 50 sensors in a Line.

Resistance in 1.5 mm

2

wire: 13 ohm/km

Current consumption in sensor: 28 mA

Maximum current in a lane is 28 * 90 = 2.52 A

The SBP2MCG324 has a maximum output current of 2.6 Amp.

A 25 % duty cycle is worst case scenario. This is because no outputs are used on the Dupline® when only
carpark sensors are used. This means we have 125 % current (pulsating) from the cabinet to the first
sensor.

We accept a maximum voltage drop of 3.5V on the Dupline® bus, from the cabinet to the last sensor in the
line. Because the D-wire is a ”common wire” for both Dupline® and the 28V supply, the calculation is as
follows:

2’nd degree equation:

0.5*S*X²+X*L-7216=0

X = Number of sensors

S = Length between the sensors

L = The distance from cabinet to first sensor in line

This formula can be used to calculate the above mentioned unknown factors in a carpark line. Please find
the calculation spreadsheet named “cp3” on

http://www.productselection.net/MANUALS/UK/cp3_manual.pdf

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1

2

4

5

Cable 1-

X

130

X X

100

120

X X

120

110

X X

140

81

X X

125

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X X

150

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X X

175

Table for Cable Length, Cross Section and Number of Sensors in a Line

The table below can help decide upon cable length and number of sensors in a line from cabinet to sensor 1
and between the sensors.

An example could be:

50 sensors in a line using a 1.5mm

The result from the table is the following:

Maximum cable length from the cabinet to first sensor in line is 69 m

Maximum cable from sensor 1 to sensor 50 is 150 m

Table 1

Cable C-1 40 50 2.5 m 3.0 m 3.5 m

1. Cable length in m between cabinet and sensor 1

2. Number of sensors on a line

3. Distance between sensors in m

4. Cable in m between sensor 1 and sensor X

2

cable. Distances between sensors are 3.0 m.

Please contact your Carlo Gavazzi Sales office if you have any questions regarding the calculations, or if you
need help with your calculations.

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Carpark Master Zone Counter (MZC)

Introduction

The Master Zone Counter (MZC) is part of the Dupline® Carpark 3 system. The MZC is a counting system
which is able to detect and count cars when they enter and exit zones in the Carpark facility and send the
information to displays and the Dupline® Carpark software for display on a computer.

To make the MZC system fully compatible with the single-space detection system, the MZC transmits its
count values by emulating a number of single-space segments. This means that the values for the displays
are broadcasted on the 3-wire Dupline® bus. Also, the values are displayable in the SBP2CPY24, so that they
can be used in the Carpark software equal to the data from the standard space-by-space system.

The MZC system is often used in a single-space system to keep track of the cars on the rooftop, where no
ultrasonic single-space sensors can be installed. It can also be used to implement a complete parking
guidance system at a lower cost than a single-space system.

Hardware

The MZC is using the same hardware as the standard Carpark guiding system:

SBP2MCG324 - Carpark master generator

SBP2WEB24 - Carpark controller

SBP2CPY24 - Carpark server

SBPSUSCNT - Carpark Count sensor

If a stand-alone counting system is required, the customer will need these modules.

If the customer already has a space-by-space system but want to add a count solution on a rooftop, it
would suffice to add an SBP2MCG324 for the count part. The software for the MZC is already built into the
SBP2WEB24 and the SBP2CPY24.

Sensor

The counting system needs a specially designed sensor for counting. The SBPSUSCNT is a vertical sensor
with a rapid detection principle. This means it can count cars running up to 20 Km/h. The sensor is to be
mounted in the driving lane The sensor is to be mounted in the driving lane at the height of 2.0 to 2.5 m
from the floor level pointing directly towards the floor. When a car passes beneath the sensor, the signal is
transmitted to the Carpark system as an entry or an exit. The sensor uses the 3-wire Dupline® bus and must
be installed in the same way as other Dupline® Carpark 3 sensors. Use the same installation rules as for the
standard Carpark 3 sensors:

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maximum 50 sensors in a line and maximum 90 sensors on an SBP2MCG324 Carpark master. Please refer to
the section ‘Calculation’.

SBPSUSCNT

The sensor must be mounted, so that it is pointing directly towards the floor with a vertical deviation of
maximum two degrees to avoid poor detection. The detection quality of a sensor is proportional to the
mounting accuracy of this sensor.

Operating Principles of the Counting system

The counting system can work as a stand-alone counting system or in a mixed solution together with the
carpark single-space system. In any case, the counting system consists of a group of MZCs, and each of
these MZCs has a certain number of entry and exit points for the cars. These are called detection points
(DPOs) and this is where the sensors must be mounted to detect passing cars.

To make the counting system fully compatible with the single-space system, the MZC transmits its MZC
count values in exactly the same way as the addresses in the single-space system. Each address for the
sensors are unique, and the algorithm in the Carpark 3 system can see if the sensor is placed in either an
MZC system or a single-space system.

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MZC

Typically, one MZC comprises a level of the parking facility, but it can also be a part of a level or even the
entire carpark. An MZC has a certain amount of parking spaces available, and the function of the MZC
system is to detect and count the cars entering and leaving the MZC and thus keep track of the number of
available spaces.

The counting system transmits the availability number for each MZC and allows the MZC to be read by local
or totalizing displays. This communication takes place in the SBP2CPY24 part, where the carpark software is
located.

Detection Points (DPOs)

A detection point is a lane or driveway where cars enter or leave an MZC. A typical example of a DPO is a
ramp between two floors, but it could also be the entry point from the street into the Carpark, or the exit
point. In many cases one and the same DPO is involved in two MZCs. For example, a DPO which is an exit
point for floor 2 can, at the same time, be an entry point for floor 3. The MZC system can handle maximum
40 DPOs. Each DPO consists of minimum one sensor (‘One-sensor DPO’), but normally of two sensors
(‘Two-sensor DPO’).

Each detection point needs sensors connected to the 3-wire Dupline® bus to detect passing cars. Dupline®
ultrasonic sensors are usually used, but other sensor types, like standard photoelectric sensors or loop
detectors, can be employed. Connection is made by coupling the sensor output to a Dupline® input
module.

The MZC provides the option to use either one or two sensors in each DPO. We recommend two sensors
with a distance of 2 m between them because this solution offers the possibility to detect the direction of
the car and allows a more efficient filtering to avoid false detections. Please refer to the section ‘Mounting
the Sensors’ for further information. Sometimes cars go in the wrong direction in a unidirectional lane, and
in a two-sensor solution, the MZC is able to manage this problem so that the count will still be correct. In
bidirectional lanes two sensors are mandatory.

When configuring detection points, it is possible to define a timeout value. This timeout feature is only to
be used in case of a long distance (more than 3 m) between sensor 1 and sensor 2. The timeout allows
accurate car detection as long as the delay period is shorter than the timeout value from the moment
where sensor 1 becomes inactive till the moment where sensor 2 becomes active. For a typical distance of
2 m between the sensors, 1 sec. is the recommended value. Too high a value increases the risk of detection
faults.
Single-sensor DPOs are mainly implemented when it is impossible or difficult to use two sensors, for

example in an outdoor installation with loop detectors.

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Initialisation and adjustment

In the initial configuration, the installer has to define the number of spaces in each MZC. From that point,
the MZC will increment or decrement the count values as the cars enter or leave the MZCs beneath the
detection points. Since any counting system involves the risk of accumulating detection faults, it is
important to have a manual counting adjustment facility that can be used from time to time whenever
required. In the Dupline® Carpark counting system, this manual adjustment is performed via the built-in
web server, which can be accessed from a smart-phone or a laptop. By using a standard browser, the
number of available spaces from each MZC can be read and adjusted if needed. The web server is also used
for the configuration of the MZC. For further information on this topic, please refer to the SBP2CPY24
software installation manual. This manual is available here:

http://www.productselection.net/MANUALS/UK/cp3_manual.pdf

Stand-alone system examples

A simple parking facility with one entrance and one exit

Minimum requirements for this simple stand-alone system are:

- 1 SBP2MCG324 Carpark master generator

- 1 SBP2WEB24 Carpark controller

- 1 power supply 28VDC

- 2 sensors to detect passing cars at the entrance

- 2 sensors to detect passing cars at the exit

- A PC to program the MZC

- Displays (optional but should always be a part of a counting system)

The power supplies used must have the correct ampere size. Each of the Carpark master modules
(SBP2MCG324) can supply the third wire with 2.6 Amp, and the output of this module is pulsating. This

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means that the power supply must be at least double size (5.2 Amp). The power consumption depends on
the number of sensors connected to the 3-wire Dupline® bus.

Note: The modules are short-circuit protected and will not be ruined by a short circuit. If a short circuit
occurs, the yellow LED on the CMCG module will be blinking. Make sure that the wiring is correct prior to
connecting power to the system.

A simple stand-alone system (see the above example) can easily be transformed into a complex system
with multiple entrances and exits (see the example below) by adding two additional detection points
(DPOs), each with two sensors connected to the 3-wire Dupline® bus.

A simple parking facility with two entrances and two exits

Example of multiple floors

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In this example, we have two MZCs: ground level and 1st floor level. They will be named MZC 1 and MZC 2
in the following.

MZC 1 has two entrances (DPOs) from ground level and one entrance (DPO) from MZC 2 (the transition
from level 1 to ground level is also an entrance). This makes three entrances in total.

MZC 1 also has two exits (DPOs). One exit to Main Street and one exit to MZC 2.

MZC 2 has one entrance (DPO) from MZC 1 and one exit (DPO) to MZC 1.

Each DPO consists of two sensors connected to the 3-wire Dupline® bus.

In the diagram below, we have converted the 2-floor installation into modules. We need 6 ultrasonic
sensors and 2 loop detectors for the entrances and exits. We use loop detectors, because the ultrasonic
sensors cannot be used outside on a roof.

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Connection diagram for the above 2-floor 4-DPO example

MZC counting system with a split between standard and reserved spaces

MZC counting systems in parking facilities have a recurring issue in not being able to detect the split
between standard and reserved spaces, typically used for handicap or VIP spaces. So, even if the signs
outside the car park are showing that spaces are available, the driver may find that there are no open
spaces in the required category.

The MZC system offers the option to manage the split between standard and reserved spaces. The reserved
spaces are implemented as a single space system where each space is equipped with a carpark sensor. The
precise reserved space availability information achieved is linked to the MZC, which can calculate the
available standard spaces from the total number of spaces. As a result, the displays outside the car park can
show how many spaces in each category are available. As a further benefit, the system makes it easier for
disabled people to find the handicap spaces because of the blue LED indicators. Reserved VIP spaces could
be indicated by amber LEDs.

We recommend that the installer uses an independent SBP2MCG324 CMCG for the counting system. This
only as a precaution against failure on the 3-wire bus. If the systems are kept electrically separated, failure
will affect only the afflicted circuit and not the entire system.

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MZC combined with the Single-Space System

The MZC can easily be combined with the single-space detection system. Using the same configuration tool
and the same carpark software (SBP2CPY24) as for the single-space system, installers can easily combine an
MZC system and a single-space system.

The counting system uses a different sensor (SBPSUSCNT) intended for counting, and the single-space
system uses either a lane-mounted sensor or a vertical sensor for detection of cars in a parking space. The
additional modules used are identical for both systems. Assignment and calibration in the configuration
tool are equal for all sensor types used in Carpark 3. The significant difference between single-space and
MZC lies in the configuration part. The design in the SBP2CPY24 is more or less equal to the single-space
system. Please refer to the ‘Software Installation Manual’. The software installation manual is available
here: http://www.productselection.net/MANUALS/UK/cp3_manual.pdf

Single-space detection and counting system combined

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Installation of the Counting System

Below we will describe installation of the counting system and especially the count sensor in details.
Correct installation of the sensor will improve the accuracy of the entire counting system. Examples of
further actions to improve accuracy, such as mechanical solutions, will follow.

The Count Sensor

The MZC is the heart of the counting system - but in order to make the counts, we need sensors. The
ultrasonic sensor SBPSUSCNT is designed for this purpose. The sensor must be installed indoors or in such a
way that the housing is not exposed to water.

Other sensor types, like for instance optical sensors or loop detectors, can be used. They just need to be
connected to a Dupline® transmitter.

In this chapter we will describe the ultrasonic sensor.

Sensor Hardware

Only the count sensor SBPSUSCNT can be used together with the MZC. Other ultrasonic sensors do not
work with the MZC system. The base holders SBPBASEA and SBPBASEB can be used with the count sensor.

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Sensor Installation (DPO)

The vertical sensor must be installed pointing directly to a hard and straight surface. It must be mounted on
the ceiling over the driving lane no more than 2.5 m above the floor and pointing directly towards the floor.
The angle of the sensor must have a vertical deviation of maximum +/-2-degrees. Sensors must be installed
at all entrances and exits to provide a correct counting.

The sensor sends out a 40 kHz ultrasonic signal, and it is important that the receiver inside the sensor is
able to detect the returning signal without problems. If the angle is awkward or the surface of poor quality,
the signal might be interrupted resulting in the sensor's flashing red or even miscounting.

Various possibilities of installation of one and two sensors at exits and entrances will be described in the
below sections.

Two-sensor DPO

The two-sensor option is probably the most common installation. This solution makes it possible to use the
same lane as entrance and exit, even if the cars are going the wrong way. Installations often consist of
independent entrances and exits as shown below.

A two-sensor solution could look like this:

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The entrance DPO consists of two sensors, sensor 1 and sensor 2. The DPO in the MZC is programmed so
that sensor 1 is first and sensor 2 is second. In this way, the system is able to determine the direction of the
car. If, for some reason, sensor 2 is activated before sensor 1, the MZC will accept this as an exit, if sensor 1
is activated shortly after sensor 2 has been activated.

The below schema describes the different rules of counting to which the MZC will be exposed in various
circumstances. These examples illustrate only the possibilities for the entrance, but the same rules apply
for the exit as well.

Schema of counting rules

The rule to the right, where all four sensors are pairwise activated, is only allowed if the sensors are
pairwise programmed in the configuration tool as entrance sensors and exit sensors respectively. If this is
the case, the system will count the cars correctly. See example below.

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Maximum 5 sensors as B

In the below drawing we have an example where two sensors marked “A” are programmed as entrance
sensors and the opposite sensors marked “B” are programmed as exit sensors.

It is possible to increase the number of sensors for group A and B to ten sensors in total. Five sensors for
each group. Please refer to the software manual available here:

http://www.productselection.net/MANUALS/UK/cp3_manual.pdf

Maximum 5 sensors as A

In the example below: if two cars are passing the sensors at the same time, the MZC will not count
correctly, because, when activated, the MZC cannot determine if the car is going in or out. However,
placing the DPO close to a cross section, corner or another place where the drivers will automatically slow
down or be patient, this phenomenon will seldom appear.

Sensors 1, 4, 6 are programmed as input sensor and sensor 2, 3, 5 as output sensors.

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Mounting the Sensors

Knowing the distance between the sensors is very important. When mounting the sensors, the installer
must be careful to install the sensors correctly.

The sensors can be mounted on either rail, in the ceiling or as lowered sensors on a conduit.

The sensor must be installed above the lane at the height of maximum 2.5 m and minimum 2 m. The angle
of the sensor beam is 17 degrees. This is the case in the below calculation.

Example of two ultrasonic sensor beams

In a 2-sensor DPO, the following precautions must be taken into consideration:

- When sensors are installed at maximum height (h), the distance (m) can be calculated in this way:

2*h*tan17 = 2*2.5*tan(17 (+2))= 1.72 m

The (+2) is the maximum allowed deviation of the installation accuracy.

The equation above implies that the sensors must be installed no closer than 1.72 m to each other to avoid
crosstalk and false activations. Carlo Gavazzi recommends increasing the result of the equation to 2.0 m to
make sure you avoid crosstalk and false activations.

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The sensors can also detect movement if doors, gates and other moving parts are in their range. The below
drawing show a circle which indicate a perimeter not to install any movement parts closer than 2*m that
can disturb the count sensors. (m) is the distance between the sensors and we recommend a perimeter
from center of the circle on 2*m.

In some installations, a delineator to separate the lanes must be used to increase the performance of the
counting system.

Example:

If a car is driving in the middle of the lane, the counting system is at risk of not counting correctly because
the sensors may fail detect it. To increase counting accuracy, it might be advantageous to place a delineator
between the two lanes to avoid cars driving in the middle of the lane.

Bumper-to-Bumper

If cars are driving bumper-to-bumper, the sensors are not able to distinguish the cars from each other, and
the counting becomes incorrect.

The mounting height of the count sensor influences how close the cars can drive before the sensor can no
longer distinguish one from the other.

If the sensor is mounted at 2.5 m, the distance between the cars must be at least 1.10 m to make each car
distinguishable to the sensor.

If the sensor is mounted at 2.0 m, the distance between the cars must be at least 0.90 m to make each car
distinguishable to the sensor.

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Cars driving bumper-to-bumper

This problem can be minimised by using optical sensors which are fast and precise enough to detect the
small gap between the cars. However, even if this option is used, detection can still be inaccurate, so
therefore an access barrier or a speed bump between sensor 1 and sensor 2 might be the best solution to
achieve optimum accuracy.

One-sensor DPO

A one-sensor solution at the entrance and exit can make a correct detection/counting.

A one-sensor solution could look like this:

This solution is only recommendable if the direction of the cars is entirely predictable, for instance if the
entrances and exits are totally divided so that cars are not able to go in the wrong direction.

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Filter

Measure 1

Measure 2

Measure 4

Measure 6

Km/h

45

33.7

16.8

8.4

msec

80

160

240

320

Programming the Sensor

The count sensor is programmed by means of the SBP2WEB24 configuration tool. This tool can be
downloaded here: http://www.productselection.net/MANUALS/UK/cp3_manual.pdf

The count sensor has some features that can be useful during the installation. Depending on the speed of
the cars, the sensor can be programmed to count slower or faster by using the filters in the configuration
tool.

The above table gives the installer some notion of choosing between the four filters. The correct filter
depends on the filter’s maximum speed. If cars are driving 10 Km/h, choose filter 4. If cars are driving 20
Km/h, choose filter 2. Filter 1 must be used only in very exceptional circumstances. This filter is so sensitive
that false detections may occur, caused, for instance by windy weather. In situations where a car goes more
than 30Km/h, we always suggest speed bumps for slowing down the speed. The slower speed will increase
the accuracy of the counting system. We recommend filter 4 or filter 6 as the most common filters to use.

Appendix A:

Counting system accuracy

Determination of a counting system‘s accuracy in number/percent is quite challenging and needs further
explanation. Suggestions for optimising the accuracy, based on experience gained from numerous carpark
installations, will follow below.

The accuracy is not solely determined by the sensors and the MZC, but also by the physical environments
and the general installation.

The sensor must be mounted on a solid surface protected against shock. Any movement of the sensor may
cause faulty activations resulting in miscounts. Therefore, the sensor should be mounted directly in the
ceiling. However, if the ceiling is more than 4 m from the floor, it will be necessary to lower the sensor to
the required level using conduits or rail mounting. Of course the mounting must be completely robust and
shock-free.

In an ideal world, the system should be quite accurate and we have experienced an accuracy of 98 % on
most floors (upper floors) in a Carpark building.

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Example:

A multi-storey car park of five floors with 200 spaces on each floor.

If the system is 100% occupied, 1000 cars will be passing by the main entrance on floor 1. On floor 2 the
number is 800 cars at the entrance and so on, and on floor 5 it is 200 cars. More cars through a DPO
(entrance or exit point) will increase the risk of miscount. A miscount on one floor will affect the accuracy
of available spaces for up to two floors.

If the main entrance DPO is faulty and does not detect cars driving in, only this floor’s display shows a
wrong number of available spaces.

If a car leaves floor 1 to go to floor 2 and the DPO on this floor is defective, the number of available spaces
on floor 1 and 2 will be affected. The reason is that this DPO works as an exit DPO for floor 1 and entrance
DPO for floor 2.

Delineation

If there is no delineation between the entrance and the exit lanes, experience shows that vehicles will
always drive in the middle of the lane, which might cause activation of more than one DPO. If this happens,
the system will count the same vehicle twice and the number of available spaces will be decreased or
increased by two.

However, if there is only one DPO, it is possible to drive in the middle of the lane and still be counted
correctly. Still, this solution has a downside. If two cars pass one another in the DPO area, the system will
count only the first car that activates the sensor. The other car stays undetected. In this situation, it is not
possible to tell if the system will increase or decrease the number of available spaces by one.

Car speed is yet another issue. The sensor’s built-in filter can be used to correct this problem. If filter 1 is
chosen, the sensor will detect cars driving up to 45 km/h. If filter 4 is chosen, cars that drive less than 8
km/h will be detected.

Speed bumps

For safety and correct counting, we recommend speed bumps together with the DPO.

We recommend always driving slow through the counting system to increase the accuracy. Filter 4 and
filter 6 in the counting system represent a speed no more than 8-16 km/h and that is a proper speed.
However, speed bumps will help prevent bumper-to-bumper driving, thereby highly increasing the
accuracy, especially during rush hours.

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Anarchist drivers

Driving across the DPO and diagonally activate the sensors, is another problem we have experienced in the
Carpark systems. Such behaviour is no problem in systems with only one DPO. If, however, there is more
than one DPO, the counting system will not accept this as a valid signal and the car will not be detected.

A counting system with many DPOs, no delineation and perhaps parked cars on the lanes beside the
sensors will never be a reliable and accurate system. Resetting the system more often, perhaps every day,
will be necessary. And, of course, resetting is possible with the MZC. A built-in scheduler can reset the
system at a specific time selected by the system administrator. An appropriate time could be during the
night-time when there are no or only few cars in the carpark system. Inaccuracies are unavoidable, but if
the system is reset every 24 hours, the inaccuracy will not increase (if there are no parked cars when the
system is reset). The automatic reset will always show maximum available spaces. Besides that, the
counting system has a built-in offset. This function makes it possible to reset the system when cars are
parked in the system. If the parking has 1000 spaces in total and there are 45 cars parked at the time when
the installer performs a reset, it is possible to select 45 as an offset in the automatic reset function. This
function is also described in the software installation manual.

Sensor mounting

The sensor must always be mounted to point directly towards an even and hard surface. The surface must
not be sand, rubble or grass. For instance, concrete or asphalt can reflect an ultrasonic signal of acceptable
quality back to the sensor. Make sure that water, snow or objects do not disturb the signal, since faulty
activations may be a result.

The sensor must be mounted on a solid surface protected against shocks. Any movement of the sensor may
cause faulty activations resulting in miscounts. Therefore, the sensor should be mounted directly in the
ceiling. However, if the ceiling is more than 2.5 m from the floor, it will be necessary to lower the sensor to
the required level using conduits or rail mounting. Of course the mounting must be completely robust and
shock-free.

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Correct Connection

POW

D-

D+

Wrong connection A

POW

D+

D-

Wrong connection B

D+

POW

D-

Wrong connection C

D+

D-

POW

Wrong connection D

D-

D+

POW

Wrong connection E

D-

POW

D+

Troubleshooting

1. Wrong cabling of the sensors

A) Badly connected sensors stay white and they do not work.
B) Badly connected sensors burn and are no longer workable.
C) Badly connected sensors are dim red, and they do not work.
D) Badly connected sensors are off and they do not work.
E) Badly connected sensors are off, the others have white light on for 5/6 seconds and then turn
off, the CMCG goes into protection mode (Dupline® signal LED flashing fast)

2. Some sensors are showing green LEDs, some white LEDs:

- check if there is a wrong connection of the first sensor on the line showing white LEDs (wrong
connection A on table 1.1)

- check if cables are well inserted in the connector of the base, a missing D+ or D- can interrupt the
Dupline® bus

3. Some sensors are steady green and not reacting:

- the sensors are not calibrated, please follow the Configuration Manual about how to calibrate a
sensor

- the sensors are not addressed, please follow the Configuration Manual about how to address a
sensor

4. Sensors are flashing yellow: the addressing procedure has not been finalised, please follow the

Configuration Manual about how to address a sensor

5. Displays are not showing anything:

- check cable connection

- check if the display has been correctly set on both SBP2WEB24 and on the web server interface

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