Sirit IDentity Flex User manual

Automatic Vehicle Identification
IDentity Flex Installation Manual
900 MHz Transceiver
IDentifying solutions

IDentity Flex Hardware Manual - Notices sirit
Version 2.3 Page ii
Notices
NoticesNotices
Notices
Sirit Inc., 33 City Centre Drive, Suite 250, Mississauga, Ontario, Canada, L5B 2N5
Information contained within this manual is subject to change without notice. No part of this manual may be reproduced or
transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose
without the express written permission of Sirit Inc. (SIRIT). © 2001 Mississauga, ON, Sirit Inc. All rights reserved.
Trademarks: Product names mentioned in this manual may be trademarks, and they are used for identification only.
Part Number: IDFLEX–MAN-Version 2.3
Release Date: 20 January, 2005
SITE LICENCE – CUSTOMER DISCLAIMER
Customer (end user) acknowledges that a site license is required for each IDentity Flex system location. It is the
customer’s responsibility to file for the site license and submit the appropriate filing payment. SIRIT can assist with the
completion of the forms. United States filings require completion and submission of FCC Form 601 main with schedule D
and H. Canadian filings require completion and submission of Industry Canada Forms IC2365BB and IC2430BB.
WARNING – ON-BOARD BATTERY
NOTICE
For PLUGGABLE EQUIPMENT, the socket/outlet shall be installed near the equipment and shall be
easily accessible. For PERMANENTLY CONNECTED EQUIPMENT, a readily accessible disconnect
device shall be incorporated into the fixed wiring.
NOTICE
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to an outlet or circuit different to that which the receiver is connected.
Consult SIRIT.
RF Exposure Warning
To comply with the FCC radiofrequency (RF) Exposure requirements, the antenna(s) used with this
device must be installed to provide a minimum separation distance of 1 meter from all persons.
NOTICE
Note: This equipment complies with FCC Part 90 and Industry Canada RSS-137 rules. Any changes
or modifications not expressly approved by SIRIT could void the user’s authority to operate the
equipment. To maintain compliance, the IDentity Flex reader must be used with the power supply that
was supplied with the reader.
TRANSPONDER NOTICE
WARNING! Danger of explosion if battery is incorrectly replaced. Replace only with the same or
equivalent type recommended by the manufacturer. Dispose of used batteries according to the
manufacturer’s instructions.

IDentity Flex Hardware Manual - Contents sirit
Version 2.3 Page iii
Contents
ContentsContents
Contents
NOTICES .......................................................................................... II
CONTENTS ..................................................................................... III
1.
1.1.
1. IDENTITY FLEX SYSTEM OVERVIEW ................................... 1
System Description ............................................................................................1
Summary...........................................................................................................1
Operation ..........................................................................................................2
Components........................................................................................................3
IDentity Flex Transponder Family .....................................................................3
IDentity Flex Reader..........................................................................................5
IDentity Flex Remote Antenna ..........................................................................6
2.
2.2.
2. SITE PLANNING ............................................................... 9
Pre-Installation Questionnaire ...........................................................................9
Lane Logic Considerations..............................................................................10
Parking Access Systems.................................................................................10
Gated Access Systems ...................................................................................12
Multiple Reader Installations ...........................................................................15
Remote Antenna Mounting ..............................................................................15
Remote Antenna Mounting Options ................................................................15
Equipment Placement and Cable Routing......................................................16
Reader Location..............................................................................................16
Remote Antenna Cable and Conduit Selection ...............................................17
Remote Antenna Cable Connectors................................................................18
AC Power Connections ...................................................................................19
List of Materials.................................................................................................19
Hardware Installation Tools.............................................................................19
Interface / Diagnostic Tools.............................................................................19
3.
3.3.
3. INSTALLATION............................................................... 20
Remote Antenna Installation............................................................................20
Reader Installation............................................................................................26
Quick Power-On Test........................................................................................27
Antenna Lead Installation ................................................................................27
Cable Connector Installation ...........................................................................28
RG-58/U Cable................................................................................................28
Belden 9913 Cable..........................................................................................28
Antenna Cable Adapter ...................................................................................28
Interface Connections ......................................................................................34

IDentity Flex Hardware Manual - Contents sirit
Version 2.3 Page iv
System Interfaces............................................................................................34
Internal Wiegand Pull up Circuit ......................................................................39
Multiple Reader Installations ...........................................................................41
Discrete I/O Connector J5 ...............................................................................42
Opto-Isolated Relay Control Board .................................................................46
Memory Gate Operation..................................................................................47
Polling Sequences and Indicator Lights ..........................................................49
4.
4.4.
4. TRANSPONDER USAGE................................................ 51
Metal-Oxide in Windshields .............................................................................51
Transponder Testing ........................................................................................51
Transponder Mounting.....................................................................................52
IDentity Flex & S-Flex Transponder ................................................................52
External Mount Transponder...........................................................................53
IDentity Title 21 Tolling Application Transponder ............................................54
Conversion Procedure for T21 Transponders................................................55
Adding External Mount Transponders to the Tag List ..................................55
5.
5.5.
5. DIAGNOSTICS & TROUBLESHOOTING........................ 56
Diagnostic Features..........................................................................................56
Troubleshooting................................................................................................57
Common Problems and Solutions...................................................................57
6.
6.6.
6. COMPONENTS, ACCESSORIES AND OPTIONS .......... 63
IDentity Flex Component Part Numbers .........................................................63
Options and Accessories.................................................................................64
Opto-Isolated Relay Wiring Guide ...................................................................65
7.
7.7.
7. COMPONENT SPECIFICATIONS ......................................... 71
Reader System .........................................................................................71
Antenna .............................................................................................................72
Flex Antenna ...................................................................................................72
Universal Mounting Bracket ............................................................................72
Transponder......................................................................................................72
IDentity Flex and S-Flex Transponder.............................................................72
External License Plate Transponder ...............................................................73
8.
8.8.
8. REFERENCE................................................................... 74
Glossary ............................................................................................................74
List of Figures ...................................................................................................75
List of Tables.....................................................................................................75

IDentity Flex Hardware Manual - Contents sirit
Version 2.3 Page v
Index ..................................................................................................................76

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 1
1.
1.1.
1. IDentity Flex
IDentity FlexIDentity Flex
IDentity Flex System
System System
System
Overview
OverviewOverview
Overview
System Description
SUMMARY
SIRIT’s IDentity Flex Automatic Vehicle Identification (AVI) system is a stand-
alone Radio Frequency Identification (RFID) system which communicates with
SIRIT’s IDentity Flex family of transponders and California Transportation
System Title 21 compliant transponders. The IDentity Flex system provides
positive identification of vehicles equipped with
these transponders to permit hands-free access
control to parking and gated communities as well
as for airport, truck fleet monitoring and highway
tolling applications.
The IDentity Flex Reader System is enclosed in
a weather-resistant enclosure and comprises a
radio frequency (RF) transceiver (the reader)
and a universal input voltage power supply. Each
reader system is capable of servicing four
separate transponder-reading locations, each
equipped with transmit/receive antennas.
Each reading location can be serviced by two
input (detection loops, light curtains) and two
output (gate, signal light) devices connected to
the reader by appropriate shielded cable. Each
of the remote antennas communicates with the
reader system through two 50-Ohm coaxial
cables.
Multiple readers can be networked to provide
coverage of any number of lanes at a given site.
The reader system may be configured for
customized operation by a combination of
externally accessible hardware jumpers and
menu-driven software settings via a dedicated
RS-232 maintenance communication port.
IDentity Flex
Windshield mounted
transponder.
Read ranges up to 25
feet.
Unique security
feature available that
deactivates
transponder once
removed from
windshield.
Each IDentity Flex
reader supports up to
4 transponder read
points.
2 inputs, 2 outputs at
each read location for
activation and
gate/light control.

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 2
The IDentity Flex system is capable of communicating transponder transaction
activity to variety of established back-end host systems including ASCOM, WPS
and Safehouse via. RS 232, RS 485 and Wiegand interfaces, as well as simply
reporting transponder identification information.
The IDentity Flex Reader can in many situations replace the function of the lane
controller as it has discrete outputs on board that can be used for gate control or
other lane control functions. In addition, the IDentity Flex Reader software
contains a translation table that can be used for transponder identification and
validation. As an example, if at some future point you wanted to add other
IDentity Flex transponder patrons from some other installation into your system it
can be done simply and economically. This would be both convenient and cost
efficient, as patrons would not be required to carry multiple access devices.
OPERATION
The IDentity Flex Automatic Vehicle Identification system is part of an electronic
access system and provides the ability to automatically identify a vehicle, validate
its movement and communicate this information to a lane controller or centralized
management computer.
The SIRIT IDentity Flex system features state-of-the-art electronics, a specially
designed remote
antenna operating at
916.25 MHz and true
versatility in
configuration options.
While the IDentity
Flex system may be
configured in many
ways and no two
installations may be
identical, there is a
certain sequence of
events in operation.
The transponder, or
radio frequency tag,
is placed on the
inside of the vehicle
windshield, (or on the
vehicle’s license plate
with a special
external tag). When a
vehicle passes over a Figure 1.1 – System Operation
RADIO FREQUENCY
SIGNAL PATTERN
COVERAGE AREA
ANTENNA MOUNTING HARDWARE
IDentity Flex ANTENNA
SYSTEM SIGNAL
FROM ANTENNA TO VEHICLE
TRANSPONDER ID SIGNAL
FROM VEHICLE TO SYSTEM
HOW THE SYSTEM COMMUNICATES WITH THE TRANSPONDER TAG
Figure 1.1
R E A D Z O N E
15 FEET
MAXIMUM
* See Note
Below
* Note : For additional antenna heights please contact SIRIT - read distances are dependent
upon antenna cable losses

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 3
detector loop at an entrance or exit, the IDentity Flex reader is armed and begins
to transmit a signal from the antenna in that lane. The vehicle is also now
positioned within the radio beam radiating from an overhead or side-mounted
antenna and the tag receives the wake-up signal.
The tag then reflects back a signal containing its identification number. The
identification signal is received and sent to the host computer for validation and is
compared with tag numbers on a master list kept by the host. If the tag number is
valid, the host opens the gate, for instance.
The same events take place when a vehicle leaves the controlled-access
location and arming and detector loops in the ground may be used as controls.
The host computer maintains an event log containing date and time stamps.
Stand Alone Operation
The IDentity Flex reader is capable of servicing four separate antenna locations.
Each of the four locations are supported by two independent discrete TTL
capable inputs, which may be used for such purposes as vehicle detecting loops
or light curtains. Additionally, each location is also supported by two discrete
outputs which are jumper configurable for either +5VDC or +12 VDC current
limited outputs. These outputs can be used for such purposes as gate vending
control or vehicle stop-and-go light control. Utilizing the ID Flex Windows
software, the reader can be configured for stand alone operation.
Components
IDENTITY FLEX TRANSPONDER FAMILY
The transponders in the IDentity Flex family are small reflective devices designed
for vehicle identification. Each transponder is a battery-operated backscatter
reflective device that communicates the account information stored in an internal
data register of 64 bits when “polled” by the reader system. The transponder is
idle unless in the presence of an RF wake-up signal from a reader on 916.25
MHz.
The IDentity Flex transponder’s wireless link uses comprehensive error detection
methods to ensure a 99.995% accuracy rate even under the most adverse
environmental conditions. Error detection and correction also ensures
information is transferred accurately between the transponder and reader.
The IDentity Flex reader system can communicate with either SIRIT’s IDentity
Flex family of transponders that utilize a Double Phase-Shift Keyed modulation
scheme or CALTRANS (Title 21) readable transponders that utilize a frequency-
shift keyed up-link modulation scheme.

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 4
IDentity Flex transponders mounted in vehicles are placed at the top of the front
windshield, behind the rear view mirror. The external mount transponder is
attached to the front license plate of the vehicle. See the section starting on
page 52 for mounting instructions.
IDentity Flex Transponder
The IDentity Flex transponder is equipped with a replaceable 4-year coin cell
battery and a second battery can be added for longer life. The transponder is
attached to the windshield by Velcro™ strips. This allows it to be removed from
the vehicle or locked in a glove box while not in use. The IDentity Flex
transponder is pre-programmed at the factory with a dealer code, facility code, ID
number and manufactured serial number.
Security-Flex (S-Flex) Transponder
The S-Flex transponder is equipped with a 4-year non-replaceable battery and is
attached to the windshield with adhesive strips. The transponder will be
deactivated if it is removed after installation, preventing use in unauthorized
vehicles. Deactivated transponders must be returned to SIRIT for reactivation.
Like the IDentity Flex transponder, the S-Flex is pre-programmed at the factory.
External Mount Transponder
An external mount transponder is preferred in truck fleet monitoring applications
and on certain vehicles that have high metal-oxide content in their windshields.
This transponder is mounted on the front license plate holder. More information
on metal-oxide’s effect on Radio-Frequency devices such as the IDentity Flex
transponders can be found on page 51.
External mount transponders can be read by Title 21 systems and, as such, are
programmed for use with the IDentity Flex system on-site by the dealer.
Mounting instructions can be found on page 53.
IDentity Title 21 (Tolling Application) Transponder
The IDentity Title 21 (T21) transponder can be read by highway toll collection
systems that are compliant with the California Department of Transportation’s
Title 21 open standard. It therefore serves a dual-purpose role in also allowing
access to IDentity Flex system controlled areas. It is mounted inside the
windshield with Velcro™ strips. The Title 21 identification number can be loaded

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 5
into the reader look-up table to allow access to facilities utilizing the IDentity Flex
reader.
IDENTITY FLEX READER
SIRIT’s IDentity Flex reader system is a Radio Frequency Identification (RFID)
system that communicates with California Transportation System Title 21
compliant transponders and SIRIT’s IDentity Flex transponder family.
The IDentity Flex reader is mounted within a weather-resistant NEMA 4X rated
enclosure and is comprised of an RF transceiver and a universal input voltage
power supply. Normally the reader and power supply are mounted onto a
supplied backplane which is sized for the locking NEMA enclosure and provides
a tidy tamperproof installation. A 120 VAC 15 Ampere power source is required
and is adequate to operate one transceiver chassis and power supply.
.
Each reader system is capable of servicing up to four separate transponder-
reading locations (read points). Each of the four read points is supported by two
independent discrete TTL capable inputs, which may be used for such purposes
as vehicle detecting loops or light curtains. Additionally, each transponder
reading location is also supported by two discrete outputs which are jumper
configurable for either +5VDC or +12VDC current limited outputs, which may be
used for such purposes as gate vending control or vehicle stop and go light
control. Each of the four read points may be remotely located from the reader by
up to 200’ of coaxial cable, which connects the reader to the remote antennas.
The reader system may be configured for customized operation by a combination
of externally accessible hardware jumpers and menu driven software settings via
the dedicated RS-232 maintenance communication port. Instructions for
configuring these settings start on page 34. The reader is connected to a laptop
computer running an emulation program such as SIRIT’s Identity Flex Windows
software, ProComm™ or Windows® HyperTerminal™ to perform system setups,
configurations and maintenance functions. The maintenance port also functions
as an input for the purpose of updating the tag translation list.
The IDentity Flex system is capable of communicating transponder transaction
activity to a variety of established back-end host systems, as well as simply
reporting transponder identification to the Host. Additionally, each of the four
different transponder reading channels have their own independent Wiegand
protocol output for reporting to back-end systems. The IDentity Flex reader is
compliant with FCC Part 15 and FCC Part 90 rules.
It is important to establish power requirements and location of the IDentity Flex
reader in conjunction with the Pre-Installation Questionnaire. A guide to
establishing the layout of the system begins on page 9. IDentity Flex reader
installation instructions begin on page 26.

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 6
IDENTITY FLEX REMOTE ANTENNA
The IDentity Flex remote antenna is an all-weather dual-aperture (transmit and
receive) antenna with an LED feature that permits quick lane configuration. The
LED feature is described below. The antenna measures 30” x 12” x 2” and
comes in a flat gray finish, and can be repainted with non-metallic paint.
The location and angle of the antenna define its read zone and it is essential that
it be installed in the correct orientation and location. The antenna comes with the
Universal Mounting Bracket (UMB) and hardware. Optional brackets may be
ordered so it can be side-mounted on a pole or wall or ceiling-mounted in any
arrangement. A description of these brackets can be found in the next section,
and installation instructions begin on page 20.
It is important to establish the remote antenna location and mounting method in
conjunction with the Pre-Installation Questionnaire. Refer to page 10 for a guide
to lane configuration and antenna location.
Antenna LED’s – Tag Read Indicator
SIRIT antennas are equipped with an LED indicator which is normally located at
the bottom right-hand corner of the antenna. This LED is used as an indicator
and test tool for the installer and facility staff. When any SIRIT tag enters the
read zone the LED will illuminate. Once the tag has been removed from the
antenna field the LED will extinguish.
This feature will assist the installer in setting the desired read pattern and signal
strength. In addition, if system problems are encountered (e.g. the gate does not
open) this option will help the troubleshooter. If the LED illuminates then the
IDentity Flex reader has read the tag and the cause of this fault is in the tag list
control or back end system. If the LED does not illuminate then there could be a
problem with the reader/antenna system, the tag or something that is restricting
the read such as metal-oxide in the windshield.
For earlier model Flex systems that require an external LED driver, Sirit can
provide a retrofit kit to allow the addition of an external LED indicator which may
be located at the antenna or else where in the lane. For installation of this option
SIRIT recommends that the installer run a separate wire to each antenna of 2
conductor 18 AWG cable.
Remote Antenna Mounting Brackets
This section is designed to familiarize the dealer with options for mounting the
remote antenna that will ensure an acceptable read zone for each installation.
The following catalog of mounting brackets will assist the dealer in completing

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 7
the Pre-Installation Questionnaire and determining which installation method will
be used for each lane.
Figure 1.2 – IDentity Flex Mounting Options
IDentity Flex ANTENNA MOUNTING OPTIONS
(See Option Sheet for actual parts that are included)
IDFLEX-ANT-CMB
IDFLEX-ANT-01
ANTENNA
WITH
UNIVERSAL
MOUNTING
BRACKET
(AS SOLD)
UNIVERSAL
CEILING
MOUNT
BRACKET
IDFLEX-ANT-CMB+WMB
UNIVERSAL
POLE / WALL
MOUNT
BRACKET
OPTIONAL
CEILING
MOUNT
METHOD
IDFLEX-ANT-WMB
LAG SCREWS
(Not Supplied)
LAG SHIELDS
(Not Supplied)
IDFLEX-ANT-WMB
OPTIONAL
UNIVERSAL
POLE / WALL
MOUNT
BRACKET
MAN-IDFLEX-FIG7A
SCREWLOK
PIPE CLAMPS
(Not Supplied)
MOUNTING BAR
(Not Supplied)

IDentity Flex Hardware Manual - System Overview sirit
Version 2.3 Page 8
Coaxial Cables and Conduit
Communication between the IDentity Flex reader and the remote antennas is by
means of coaxial cable. There are two cables from each antenna to the reader –
one for the transmit signal, one for the receive signal. Conduit diameter must be
sufficient to house both cables and any other communication cabling required at
the read location. Power cables should not be housed in the same conduit as
these cables.
Cable selection is dependent on the distance between the reader and the remote
antennas. It is important to establish the cabling requirements in conjunction with
the Pre-Installation Questionnaire. See the Site Planning Guide section on
cabling starting on page 17.
Below is a summary of important installation tips:
•If the cable run between the reader and the remote antenna is less
than 50 feet, use Belden 8240 (RG-58/U) cable.
•If the cable run between the reader and the remote antenna is more
than 50 feet (to a maximum of 200 feet) use Belden 9913 cable.
•For Belden 8240 (RG-58/U) cable, installers will need to provide
connectors. SIRIT can provide these by quoting part # IDFLEX-
CONN-RG-58/U. Each kit contains enough connectors to install one
antenna - two (2) Amphenol 82-5375’s and two (2) AMP 226600-1’s.
•A pre-connectorized cable kit is also available from Sirit, Order PN
IDFLEX-CONN RG58/U-60K. Each kit contains 2 – 50’ lengths of
RG58/U cable with “N” connectors installed and 2 crimp mini-uhf
connectors not attached.
•For Belden 9913 cable, installers will need to convert from 9913 to a
mini UHF connector at the reader end. SIRIT can provide a cable
converter kit as an option by quoting part # IDFLEX-CABLECON.
Each kit contains enough connectors for one antenna.
•For Belden 9913 cable, installers will need to provide connectors.
SIRIT can provide these by quoting part # IDFLEX-CONN-9913. Each
kit contains enough connectors to install one antenna - four (4)
Amphenol 82-202-1006 connectors.
•Installers must use the proper crimping tool to install the above
connectors. You can purchase this item locally (Amphenol CTL-5) or
SIRIT can provide this as an option by quoting part # IDFLEX-CRIMP.
•SIRIT recommends that outside connectors be weather-proofed by
applying proper weather-proofing tape. First, mastic tape is applied
over the dry connector then covered with electrical tape. Tape kits are
available from SIRIT by quoting part number IDFLEX-CONN-WKIT.

IDentity Flex Hardware Manual – Site Planning sirit
Version 2.3 Page 9
2.
2.2.
2. Site Planning
Site PlanningSite Planning
Site Planning
Pre-Installation Questionnaire
The Pre-Installation Questionnaire provided by SIRIT is an essential tool in
determining the site layout and equipment needs.
This guide has been designed to assist the planner make decisions about lane
configurations. If any questions arise regarding the location of vehicle presence
loops, gates and remote antennas, the answers should be in the following
section.
If there are questions about cabling and connectors, the Installation Tips sheet
on the front of the questionnaire should cover them, and a further description can
be found in the section starting on page 17.
SIRIT Pre-site Assistance
As an added service SIRIT offers pre-site assistance to our resellers. Upon
receipt of a purchase order for an IDentity Flex System, SIRIT will send a fax or
email which:
1) Confirms the order;
2) Requests transponder facility code and identification information (if
transponders have been ordered) and
3) Requests completion of our pre-site questionnaire. SIRIT takes pride in
assisting our resellers by reviewing and making recommendations on pre-
site requirements.
If you have not received your confirmation fax with the above information please
contact SIRIT.

IDentity Flex Hardware Manual – Site Planning sirit
Version 2.3 Page 10
Lane Logic Considerations
The following sections contain guidelines for establishing lane configurations, first
for Parking Access, then additional considerations for Gated Access starting on
page 12.
PARKING ACCESS SYSTEMS
Antenna Mounting – Read Zone
The Read Zone is a roughly conical space between the antenna and the elliptical
area on the ground that the signal illuminates. Once the transponder is in the
read zone, it reflects a signal back to the antenna. The shape of the read pattern
is dependent on the location of the antenna, its orientation on the mounting
bracket and the power output of the reader. The installer should use the
following guidelines to ensure that:
•Transponders in adjacent lanes are not read
•Vehicles are not trapped between the read zone and the gate
•Vehicles slow to an appropriate speed (or stop) before the gate opens.
Lane presence inductive loops are typically embedded 8-10 feet from the gate
and the read zone should start just past this loop moving towards the gate.
For Parking Access Systems, SIRIT recommends that the antenna pole or
overhead antenna be mounted approximately 2 – 3 feet in front of the gate. This
will ensure that the antenna read pattern will be at approximately 10 feet from the
gate and in close proximity to the presence loop. Once the antenna is aimed
(approximately 40°angle from vertical) the antenna pattern will be within this 10-
foot range.
Antennas are typically mounted on poles or ceilings at 10 –15 feet in height.
Angling the antenna down so that the beam is in the desired location ensures
proper reading of tags. The antenna can be physically adjusted and the power
settings set in the reader software to obtain the desired results. Setting the
power level too high may result in reflection of the beam and the possibility that
adjacent lanes will be read. Setting the power level too low may result in no or
intermittent tag reads.
The following diagram gives an example of a typical installation. These figures
are examples only and should not be utilized as an installation guide. For further
assistance, please contact a SIRIT representative.

IDentity Flex Hardware Manual – Site Planning sirit
Version 2.3 Page 11
Figure 2.1 – Typical Parking Access Lane Configuration
Memory Gates
Memory gates are typically used if the SIRIT antenna read zone will be
positioned more than 10 feet from the gate or where there is a possibility that a
vehicle may get stuck between the presence loop and the gate and not be in the
read zone. Memory gates are used to buffer the gate open signal for the second
or third car in the lane depending upon how far back the read pattern is. The
further away the antenna read range, the more signals the gate will have to
buffer. If antennas are too far back in the lane, there is a possibility that a lane
logic issue will result, if an invalid vehicle enters the lane along with valid
vehicles.
Internal Buffer Circuit
SIRIT has an internal buffer circuit that can be used only when the IDentity Flex
reader controls the gate directly. It operates in the same fashion as memory
gates as stated above by buffering the gate open signal. The IDentity Flex
reader must receive a change of state of a gate position signal to clear the buffer
or pass the next gate open signal.
IDentity Flex Antennas
EXIT
POLE HEIGHT
10 - 15 FEET
2-3FEET
ARMING / ENTRY LOOP
8-10FEET
READZONE
ENTRY
EXAMPLE OF A LANE LAYOUT FOR PARKING ACCESS SYSTEMS
DWG-IDFLEX-KIOSK-01A

IDentity Flex Hardware Manual – Site Planning sirit
Version 2.3 Page 12
Arming the SIRIT IDentity Flex Antenna
Under certain conditions it is desirable to arm the SIRIT IDentity Flex antenna on
demand. This can be accomplished by using the dry contact output from the
Gate Down position switch, presence loop dry contact output or both. For
example the location may have a situation where users remove the IDentity Flex
transponder from the vehicle and walk past the antenna. If anti-passback is
activated then the users’ vehicle may be locked in. In this situation it is desirable
to only read the transponder when the vehicle is over the presence loop. The
presence loop would be used to arm the antenna. Arming the antenna also
ensures that there is no risk of unwanted reads if a vehicle comes close to an
antenna but is not on the presence loop.
The site may not have memory gates and this means that the AVI signal should
not be sent to the host until the gate starts in the Down position. If the AVI signal
is sent while the gate is in the Up position it will be lost. At the same time it is
desirable to read the transponder while the vehicle is over the presence loop. To
accomplish this the dry contacts of the Gate Down position switch and the loop
output dry contacts can be connected in series. When both conditions are met,
with the vehicle over the loop and the gate arm starting to come down, the
antenna will be armed and the transponder will be read. In this scenario it is
desirable to have the antenna read pattern within 10 feet of the gate (antenna
pole mounted at 2-3 feet from the gate). This avoids having the vehicle stuck in
the lane due to a lane logic issue.
GATED ACCESS SYSTEMS
Gated Access systems maybe different from Parking Access as the traffic flow
and overall requirements differ. In Parking Access there are revenue control
considerations and a requirement to open the gate when the vehicle is close to
the gate. This may or may not be the same in Gated Access systems.
Figure 2.2 shows typical Gated Access lane configurations. These figures are
examples only and should not be utilized as an installation guide. For further
assistance, please contact a SIRIT representative.

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Version 2.3 Page 13
Figure 2.2 – Typical Gated Access Lane Configurations
In addition to the In addition considerations for Parking Access, the Gated
Access system installer may include the following options in the installation plan.
Use of Entry Presence Loops
Entry presence loops can be utilized to arm the SIRIT reader. Depending on the
application, presence loops may or may not be required.
Figure 2.2 shows a typical configuration with an arming loop. For more
information, please contact your dealer or Sirit.
IDentity Flex Antenna
READZONE
DISTANCEISSITE
SPECIFIC
ENTRY
FREEEXIT
EXAMPLE OF A LANE LAYOUT FOR GATED COMMUNITY SYSTEMS
DW G -ID FLEX -KIOSK- 03A
POLE HEIG HT
5 - 15 FEET
SLIDINGGATE
Entry Arming Loop

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Use of S-Flex Transponder
Gated Access systems may have a requirement for SIRIT’s Break on Removal
(BOR) S-Flex transponder. The main difference between the S-Flex transponder
and the standard IDentity Flex transponder is that the S-Flex transponder will
deactivate once it is removed from the windshield. In addition, users should be
made aware of proper test procedures for testing for metal-oxide
windshields prior to permanently affixing the S-Flex transponder to the
windshield. These procedures can be found on page 51.
Gate Output Relays
Gated Access systems may require that SIRIT activate the gate directly from the
SIRIT IDentity Flex reader. SIRIT makes relays and mounting components
available as an option.
Memory Gates
Memory gates or the use of SIRIT’s reader buffer circuit (If the IDentity Flex
reader controls the gate directly) may be required. This will be a requirement if
the antenna and read zone are further away from the gate (beyond 10’ as in
Parking Access systems). The read zone could be, for example, up to 50 feet
away. However, this may create unwanted access due to an unauthorized
vehicle getting stuck between two authorized vehicles.
If a facility wishes to place the antenna read pattern beyond 10 feet there may
not be a concern with unwanted access. Placing the antenna read distance far
away allows time for the gate to open so vehicles do not have to slow down and
this may be desirable. At some entry points, booths may be manned and this
reduces the risk of any lane logic issues.
Use of T21 (Tolling Application) Transponders
Gated Access systems can accommodate users who have SIRIT’s T21 tolling
application transponders. The T21 transponder serial numbers will have to be
converted and entered into each reader’s database to output the desired facility
code and ID.
Desktop Reader
In certain situations, Gated Access sites may have a large number of T21
transponders to enter into the reader’s database. To make this task easier SIRIT

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makes available an optional desktop reader which allows each tag to be scanned
into the database. Users can scan in the source tag Identification number and
then assign a destination or output identification number containing a facility code
and ID. Each IDentity Flex reader is capable of storing up to 10,000 translated
T21 transponders in its database.
Antenna Mounting
Gated Access systems may require that the SIRIT antenna be mounted lower in
height compared to Parking Access systems. In order to ensure consistent reads
SIRIT recommends that the antenna be mounted at 10-15 feet above the island.
Please consult with SIRIT if lower antenna heights are desirable.
Installers of Gated Access systems should also review lane logic considerations
for Parking Access systems as some of the sections (e.g. Antenna LED’s – Tag
read indicator and SIRIT Pre-site assistance) will also apply.
MULTIPLE READER INSTALLATIONS
Multiple Local or Remote Readers
Gated Access systems may have multiple local or multiple remote readers. If
configurations or tag databases need to be updated SIRIT has a number of
options available. SIRIT can support up to 60 local readers through optional
smart switches. Local readers can be connected up to 4 miles away with the use
of optional short haul modems. If access is required to readers that are located
beyond the 4-mile limit SIRIT makes available dial-up capabilities using optional
US Robotics® 56K external modems. Multiple local or remote reader access
requires the use of SIRIT’s Windows®-based IDentity Flex software.
Instructions for configuring the IDentity Flex system for multiple readers can be
found on page 41. Additional information can be found in the Windows®-based
IDentity Flex software manual.
Remote Antenna Mounting
REMOTE ANTENNA MOUNTING OPTIONS
Overhead
For overhead installations, antenna brackets are bolted to ceilings at a height of
no more than 15 feet above the driveway. Antennas brackets are adjusted to