Keri Systems V-Track User Manual
V-Track™ Automatic Long Range Vehicle ID System
20 Feet
RXR-10
Receiver
EX-10
Exciter
Up To 100 Feet
LRT-5
Transponder
GATE
Installation Guide
1.0 System Overview
The Keri V-Track™ System1 is similar to the highway toll type systems such as E-ZPass®2 or FasTrak®2 in that they
both operate in the 900 MHz band. However, V -T rack™ is much easier to install and far more tolerant of different vehicle
types and metal surroundings than the toll-authority type transponder. It is also far less expensive.
The V-Track™ Vehicle Identification System consists of a directional Exciter (EX-10 - consisting of an integrated
transmitter and antenna), which sends out a uniquely coded RF signal to wards the vehicle. The Transponder (LRT-5) is
mounted on the vehicle's windshield. Once the Transponder enters the field and recognizes the coded signal, it "wakes up"
and transmits its ID number via a secure RF signal to a Receiver decoder (RXR-10). The Receiver can be located up to
100 feet (30M) away from the vehicle. The Receiver is supplied in a weatherproof enclosure for direct outdoor installation
or can be placed indoors, such as in a guardhouse, close to other electronic equipment. The Receiver outputs the decoded
data to an access control unit via standard data cabling. Systems are available that output data in either the standard Keri
MS format or in 26-bit Wiegand format. A second or exit lane can be added to the system by installing a second Exciter.
This Exciter is aimed down the exit lane in the same manner as the entrance lane’s Exciter.
Figure 1: Basic, Single-Lane Gate Controller
Installation and setup is made simple and easy through the use of the LRT-5 Transponder . The LRT-5 is equipped with an
LED that flashes Red when in the coverage area of the Exciter. The flashing Red LED indicates that it is in the Exciter
field and is shipping data to the RXR-10 Receiver.
1. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
2. E-ZPass® and FasTrak® are registered trademarks of E-ZPass® New York and the Bay Area Toll Authority,
respectively.
Page 1 of 20 P/N: 01538-001 Rev. G
V-Track™ Automatic Long Range Vehicle ID System
RXR-10
Receiver
EX-10
Exciter
LRT-5
Transponder
GATE
Installation Guide
2.0 EX-10 Exciter Installation
The EX-10 Exciter should be installed two to four feet (70 to 130 cm) from the edge of the entry lane. A gimbal mount is
provided allowing for flexible horizontal and vertical orientation of the Exciter. Antenna horizontal and vertical radiation
patterns are shown below. An Exciter height of five to nine feet above the ground is recommended, with six to seven feet
(180 to 210 cm) being a typical height. The area between the antenna and the vehicle lane must be clear of shrubbery
higher than 3 feet (90 cm). Low growing shrubs are acceptable. T aller plants immediately around the Exciter mounting
pole (to hide the pole) are acceptable as long as they are two to three feet below the aimed antenna within the Exciter unit.
The antenna housing may also be painted to blend in with its surroundings so long as a NON-metallic paint is used.
The Exciter’s response-to-vehicle transponder time is set for typical gate operation use. Contact the factory for high-speed
operations.
NOTE: A Yagi antenna may also be used instead of the standard, integrated antenna, if the installation application so
dictates. Please contact Keri Systems for additional information and ordering of the Yagi antenna.
2.1 Exciter Orientation
2.1.1 Horizontal Plane
The horizontal orientation of the Exciter is set so that the center of the pattern is directed at the right edge of the road,
which permits the left half of the detection pattern to cover most of the entry lane. Refer to Figure 2.
Figure 2: The Horizontal Antenna Coverage Pattern
Page 2 of 20 P/N: 01538-001 Rev. G
V-Track™ Automatic Long Range Vehicle ID System
20 Feet
EX-10
Exciter
5 to 9
Feet
Optional Speed Bump
LRT-5
Transponder
Installation Guide
2.1.2 Vertical Plane
Vertical orientation is adjusted so as to aim the antenna at a spot about twenty feet (6.5 M) on the road from the Exciter.
From this spot forward, the detection area will increase as you get closer to the gate. This is shown in Figure 3.
Figure 3: The Vertical Antenna Coverage Pattern
2.1.3 External Arming Input
Some installations prefer that the V-Track not be active until a vehicle approaches. The V-Track system is built with an
input for external arming. This allows the use of road loops, IR detectors, pressure sensors, etc. to activate the V-Track
system Antenna/Exciter. This system is not active until the loop input wires (brown and blue on the Exciter) are shorted
together. This can be accomplished by using the arming devices output; either an open collector or the dry contacts of a
relay.
The blue wire is the high input and the brown wire is the low (ground). If there is no external arming device used, these
two wires must be connected together and this will turn the Antenna/Exciter on and allow it to function any time a
transponder is in range.
Page 3 of 20 P/N: 01538-001 Rev. G
V-Track™ Automatic Long Range Vehicle ID System
RF Antenna Cable
SHIELD
(connect to ground)
GND - BLACK
+12 VDC - REDA-wire - GREEN (to LRT Receiver, J3)
B-wire - WHITE (to LRT Receiver, J3)
not used in
single-lane
applications
EX-10
Exciter
Exciter
conguration
label
Mounting
Hardware
Exciter
Antenna
Power/Data
Cable
Arming Input Low - BROWN (to Arming Device)
Arming Input High - BLUE
(to Arming Device)
Installation Guide
2.2 Exciter Electrical Installation
The Exciter comes configured from the factory for single-lane or for dual-lane entrance/dual-lane exit applications.
Make wiring connections as follows:
• In single-lane applications only the Power (red) and Ground/Shield (black/silver) connections are made. Clip off the
unneeded Green and White wires.
• In dual-lane applications, connect the A-wire (green) to the LRT Receiver at J3 and connect the B-wire (white) to the
LRT Receiver at J3. Then connect the Power (red) and Ground/Shield (black/silver) wires.
• If the Arming Input is not being used, the Arming Input High (blue) and Arming Input Low (brown) wires MUST be
shorted.
Please refer to Section 6.0 in this Installation Guide for more information on Enter/Exit (t wo-lane) appli cations.
Figure 4: Exciter PCB
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V-Track™ Automatic Long Range Vehicle ID System
Installation Guide
Table 1: EX-10 Exciter Electrical Requirements
Parameter Requirement
Power Supply Nominal DC Voltage 12.0 VDC
Voltage Range 11.0 VDC to 15.0 VDC
Nominal Current 500 mA
Recommended Power Supply 12 VDC @ 1 A or greater
fully regulated
RF Connector Type RPSMA
Keri recommends the following cable gauges:
• AWG 18 allows up to 500 feet
• AWG 22 allows up to 200 feet
• AWG 24 allows up to 100 feet
2.3 The Exciter’s Antenna
The EX-10 Exciter’s antenna can have a gain of no more than 8.1 db, per FCC regulations. For best operation the coaxial
cable between the antenna and transmitter should be kept as short as practical. We recommend no more than 10 feet.
Longer coax lengths than this will reduce the operating range of the system.
NOTE: The cable seals in the body of the Exciter enclosure are designed to accommodate one cable. Forcing more than
one cable through these seals compromises the weather-tight seal, allowing water to enter the body of the enclosure.
Page 5 of 20 P/N: 01538-001 Rev. G
V-Track™ Automatic Long Range Vehicle ID System
RXR-10 Receiver
Gatehouse or similar location
Up To 100 Feet
LRT-5
Transponder
Installation Guide
3.0 RXR-10 Receiver Installation
The Receiver range pattern is omnidirectional, a large, circular shape with a radius of up to 100 feet (30M). A typical
mounting location is in a gatehouse for gated communities, or other enclosure, which makes it convenient to provide a
data cable from the Receiver to the control unit. An external antenna can be installed if the Receiver is mounted in a
difficult RF signal area. The LRT-5 Transponder sends its signal to the Receiver at 433 MHz so the detection pattern is
very similar to that of a garage door opener or the remote unlock on your automobile. Cable type and run length are like
any proximity reader and are specified below. The Receiver antenna detection pattern is shown in Figure 5.
Figure 5: RXR-10 Receiver Detection Pattern – 100 Foot Radius Circle
The PC Board outline for the RXR-10 Receiver is shown in Figure 6 on page 7. The Receiver is equipped with a Range
adjustment potentiometer (RV1). For single lane applications the system installer only needs to supply DC power to the
Receiver and Exciter. For information on Enter/Exit applications, please refer to Section 6.0 in this Installation Guide.
Page 6 of 20 P/N: 01538-001 Rev. G
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