5  It is recommended that Reno A&E LW-120 wire or equivalent wire be used for the antenna loop. Use a wood stick or roller to insert the antenna wire on top of the loop wire in the saw slot (do not use sharp objects).

6  Wrap the antenna wire in the saw slot to form the single turn antenna loop.

7  The antenna loop wire must be twisted together a minimum of 6 twists per foot from the end of the feeder saw slot to the receiver.

8  The wire must be held firmly in the slot with 1" pieces of backer rod every 1 to 2 feet. This prevents the wire from floating when the loop sealant is applied.

9  Apply the sealant. The sealant selected should adhere well to the pavement material and have similar contraction and expansion characteristics to that of the pavement material.

OPERATING INSTRUCTIONS FOR

Model AVI-1 / AVI-12 / AVI-22 / AVI-25

AUTOMATIC VEHICLE IDENTIFICATION RECEIVER

I. General Description:

The Automatic Vehicle Identification Receiver identifies vehicles equipped with a uniquely coded transmitter and provides an opening signal for the gate or door operator. The receiver uses an antenna loop coil installed in the road surface to receive the transmitter’s code. The transmitter must pass directly over and within 3 feet of the receiver’s antenna loop coil. The receiver is factory programmed to identify a specific transmitter code and does not require any adjustments or setup. The receiver is operational within 2 seconds after application of power. A high-density LED on the front of the receiver indicates the presence of a valid-coded transmitter within the antenna loop area.

The Model AVI-1 is a 120 Volt AC unit; the Model AVI-12 is a 12 Volt DC unit; the Model AVI-22 is a 24 Volt AC unit; and the Model AVI-25 is a 24 Volt DC unit.

II. Antenna Loop Requirements:

·  Antenna Loop Area: The maximum area that can be covered by the antenna loop is 120 square feet.

·  Antenna Loop Feeder Length: 300 feet (91 meters) maximum with proper feeder cable and appropriate loops (see Antenna Loop Installation).

·  Antenna Loop Inductance Range: There are no inductance requirements.

·  Response Time: The receiver will reliably recognize a transmitter code within the antenna’s range for 250 microseconds. For any recognized code, the receiver will output a signal for a minimum duration of 2 seconds.

·  Presence Time: The receiver will hold the output signal for a valid-coded transmitter for as long as it is in the antenna’s range and for 2 seconds after the transmitter leaves the range of the antenna.

·  Antenna Range: The transmitter must be directly over and within 3 feet of the antenna loop.

·  Lightning Protection: The receiver can tolerate, without damage, a 10 microfarad capacitor charged to 2000 volts being discharged directly into the antenna loop input terminals, or a 10 microfarad capacitor charged to 2000 volts being discharged between either antenna loop terminal and earth ground.

III. Receiver Requirements:

·  Power: 89 to 135 VAC, 50/60 Hz, 6 Watts max. (Model AVI-1); 11.0 to 14.5 VDC, 6 Watts max. (Model AVI-12); 19.2 to 28.8 VAC, 50/60 Hz, 6 Watts max. (Model AVI-22); or 19.2 to 28.8 VDC, 6 Watts max. (Model AVI-25).

·  Relay Ratings: the relay contacts are rated for 6 Amps max, 150 VDC max, 300 VAC max and 180 Watts max switched power.

·  Operating Temperature: -40°F to +180°F (-40°C to +82°C).

·  Connector: (1) MS3102A-18-1P.

·  Pin Assignments (Reno A & E 801-4 Harness):

Pin / Function / Wire Color
A / Power, Neutral / DC- / White
B / Output Relay (Normally Open) / Brown
C / Power, Line / DC+ / Black
D / Loop input / Red
E / Loop input / Orange
F / Output Relay (Common) / Yellow
G / Output Relay (Normally Closed) / Blue
H / Chassis Ground / Green
I / No Connection / Violet
J / No Connection / Grey
IV. Antenna Loop Installation:

The installation procedures for the antenna loop are similar to those of an inductive loop. However, the AVI Receiver does not have the inductance range requirements of an inductive loop detector. Therefore, the antenna loop does not require as many turns of wire as an inductive loop. The AVI Receiver requires only a single turn of wire in the saw cut. The antenna loop can be placed in very close proximity to inductive loops without any interference. In fact, if an inductive loop is also required, the single turn antenna loop can be placed in the same saw cut as the inductive loop. Each inductive loop detector may react differently.

Two methods of installing the AVI Receiver antenna loop will be described; Without an Inductive Loop and With an Inductive Loop. With both methods it is important to select the antenna loop size so the transmitter will cross directly over the loop area. The antenna loop area must be less than 120 square feet and the feeder cable length from the antenna loop to the AVI Receiver must be less than 300 feet.

Example: If the road is 12 feet wide and the transmitter is mounted in the center of the vehicle under the front bumper, a 6 foot wide antenna loop would ensure that the transmitter would cross directly over the loop.


SPECIAL NOTE
If multiple antenna loops are used, they must be connected in parallel, not series.


Antenna Installation Without an Inductive Loop:

1  Mark the antenna loop layout on the pavement. Ensure that the layout does not have sharp inside corners that can damage the antenna wire insulation.

2  Set the saw to cut to a depth (typically 2" to 2.5") that insures a minimum of 1" from the top of the wire to pavement surface. The saw cut width should be larger than the wire diameter to avoid damage to the wire insulation when placed in the saw slot. Cut the loop and feeder slots. Remove all debris from the saw slot with compressed air. Check that the bottom of the slot is even.

3  It is highly recommended that a continuous length of wire be used to form the antenna loop and feeder to the AVI receiver. It is recommended that Reno A&E LW-120 wire or equivalent wire be used for the antenna loop. Use a wood stick or roller to insert the wire to the bottom of the saw slot (do not use sharp objects). Wrap the antenna wire in the loop saw slot to form the single turn antenna loop.

4  The antenna loop wire must be twisted together a minimum of 6 twists per foot from the end of the feeder saw slot to the receiver.

5  The wire must be held firmly in the slot with 1" pieces of backer rod every 1 to 2 feet. This prevents the wire from floating when the loop sealant is applied.

6  Apply the sealant. The sealant selected should have good adhering properties with similar contraction and expansion characteristics to that of the pavement material.

Antenna Installation With an Inductive Loop:

1  Mark the antenna loop layout on the pavement. Ensure that the layout does not have sharp inside corners that can damage the wire insulation.

2  Set the saw to cut to a depth (typically 2" to 2.5") that insures a minimum of 1" from the top of the wire to pavement surface. The saw cut width should be larger than the wire diameter to avoid damage to the wire insulation when placed in the saw slot. Cut the loop and feeder slots. Remove all debris from the saw slot with compressed air. Check that the bottom of the slot is even.

3  It is highly recommended that a continuous length of wire be used to form the loop and feeder to the detector. Loop wire is typically 14, 16, 18, or 20 AWG with cross-linked polyethylene insulation. Use a wood stick or roller to insert the wire to the bottom of the saw slot (do not use sharp objects). Wrap the wire in the loop saw slot until the desired number of turns is reached. Each turn of wire must lay flat on top of the previous turn.

4  The inductive loop wire must be twisted together a minimum of 6 twists per foot from the end of the feeder saw slot to the detector.

Model AVI Receiver Operating Instructions Rev 10-13-04 4 Reno A & E P/N 551-5000-02