APPLICATION NOTE #17
HID ProxPass Vehicle Identification Tag
Introduction: HID ProxPass Tag
The HID ProxPass tag is used for identification purposes to control access to and from a
parking facility. The tag attaches to and identifies a vehicle.
Advantages of using ProxPass
The ProxPass tag provides the user with “hands-free” a ccess. Wit h an average read r ange
of six feet, it adds convenience for users who need to gain access into a parking facility,
especially during extreme weather or in a hostile environment.
Company vehicles utilized by multiple employees can be tracked separately from the
employees themselves, providing such information as whether the vehicle is on the lot,
when it arrived and when it departed.
Description of ProxPass
The ProxPass tag is “active,” requiring a battery to operate. The battery provides the
necessary power to extend the read range for hands-free access. Battery life is two to five
years, depending on usage.
ProxPass adheres to the inside of the vehicle windshield. The tag is used with the
MaxiProx reader, which is typically installed on a gooseneck pedestal with the face of the
reader parallel to the controlled lane. As a v ehicle approaches the MaxiProx reader, the
information from the tag is transmitted to the reader and forwarded to the host system for
user access confirmation.
The ProxPass tag’s discrete design and ease of installation inside the vehicle minimizes
the risk of theft and damage inherent with other manufacturers’ tags and mounting
locations.
HID Card Formats Used with ProxPass
The ProxPass tag is programmable for all HID formats.
Installation of ProxPass
Install ProxPass in upper or lower corner of the front windshield on the side of the
vehicle adjacent to the MaxiProx reader. The unit should be mounted securely and not
allowed to shift positions within the vehicle. This will protect the unit and maximize the
consistency of read range parameters.
Refer to the installation instructions provided for further guidelines on using and
installing the ProxPass tag.
Rev 7/00
Installation of the HID MaxiProx Reader
Install the MaxiProx reader on a gooseneck pedestal or stanchion. HID recommends
using the Falcon S1R1235 stanchion. Because the stanchion is metal, use the Falcon
MC5375-1CR MaxiProx reader acrylic spacer kit to buffer the reader from metal. The
MaxiProx reader and stanchion should be installed far enou gh back from the vehicle lan e
so that vehicles driving by the reader will not damage it by striking it with side mirrors,
bumpers, etc.
Care should be taken when setting up control lanes that vehicles entering can
communicate with the ENTRY reader but will not pass through the read range zone of
the EXIT reader. The inverse is also true. If you have a pr e-existing installation where
this is occurring, contact your controller manufacturer to setup a delay time for “same
tag” reads on multiple readers.
Refer to the installation instructions provided for further guidelines on using and
installing the MaxiProx reader.
End-User Instructions for the HID ProxPass Tag
The vehicle must be positioned so that the ProxPass tag enters the read zone as the
vehicle approaches the MaxiP rox reader. This m ay require the driver to slow or even stop
completely in order for the tag to be read. It may be helpful to create lane controls to
stage vehicles in the proper position for effective tag detection.
Other Considerations When Using the ProxPass Tag
Loop detectors may cause interference with MaxiProx readers and cause reduced read
ranges. If this occurs, first consult the manufacturer of the loop detector to see if the
frequency can be adjusted. HID utilizes 125khz to excite and transfer data. If the loop
detector can be tuned, try to maximize the difference between the loop frequency and the
HID reader frequency.
The average read range of the ProxPass tag (with the MaxiProx reader) is six feet . The
maximum read range is up to eight feet. This should be considered when choosing a
parking space. If you park within the re ad ran ge of t he M ax iP rox reader, t he Prox P ass tag
will continually try to communicate with it. This will drain the ProxPass batteries in a
short period of time.
The ProxPass tags will try to intercommunicate, and are shipped in special packaging to
avoid this. Once they are removed from the shipping materials and a ctivated, the y should
be kept at least six inches apart. This distance should not cause probl ems with vehicles
parked close together.
The batteries inside the ProxPass tag are not replaceable. When the battery life has
expired, the tag needs to be replaced.
Rev 7/00
Possible effects on read range
(mount in vehicle) - General statement: the more surface are o f the tag
Angle(s) of the
Angle(s) of the
Angle(s) of the Angle(s) of the
tag
the reader can see the better the read range will be. Specifics: The tag will be mounted to
the windshield of various vehicles, from sports cars, mini-vans, standard trucks, to
commercial trucks. Each installation will have a different slope and wrap of the
windshield. The degree of slope and wrap will determine the effective read range.
(
example1
: Corvette, would have extreme slope and extreme wrap, the tag would be
tilted back at least 45 degrees combined with maybe 10 degrees of wrap would provide
less than 50% of the surface area to the reader).(
example 2
: Commercial truck, would
have no slope and no wrap (basically the tag would be perpendicular to the reader), this is
the worst case scenario).
Height of approach
Height of approach
Height of approachHeight of approach
(in relation to the reader) - Again, the more surface area of the tag the
better the read range. Tag mounts that are 3-4 feet a bove or below the r eader will knock
the read range down 3-4 feet.(
example
: Commercial truck, assuming a standard reader
height of 3ft. and the tag mount at 6ft., your read range is about 4ft.)
Width of the lane
Width of the lane
Width of the laneWidth of the lane
(in relation to the reader) - Assuming the worst case scenario of the tag
perfectly perpendicular to the reader, if you approach the reader as a vehicle would at a
distance of less that 1ft., your read range is approx. 3ft. If you widen the approach
distance to 7ft the reads are very intermittent. Conclusion, the vehicle approaching the
reader should be in the 3-6ft. range for consistent reads.
Angle of reader
Angle of reader
Angle of readerAngle of reader
(in relation to the lane - Most installations will have the reader mounted
parallel to the lane. This helps create the perpendicular presentation. I have found that if
the reader is mounted at a 45 degree angle to the lane it ensures the reader will have
better visibility of the tag and eliminates the perpendicular tag instance.
Speed of presentation -
Speed of presentation -
Speed of presentation - Speed of presentation -
This has the single greatest effect on read range.
You must
approach the reader at no greater than 2ft per second for consistent reads. Slower will
provide greater read range (up to 8ft) and faster will drastically reduce read range
(
Parallel - at 3ft per second, knocks the read range down to 4ft or less.
Perpendicular - at 3ft per second, intermittent reads of less than 2ft).
Rev 7/00
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