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Multi-space parking meter, proximity reader, parking garage collage
Toll Free Phone:   1.800.978.4621
Toll Free FAX:      1.800.978.4621
Model AX-4 : 24VDC Single Channel Detector
Item Model: AX-4
Item SKU: WPT-AX-4
Typical Lead Time: Now
Warranty: 1 year
Features for this product:
- Single Channel
- Single Output
- 120VAC Input Power
- 6 External DIP Switches
- 2 Internal DIP Switches
- 11 Pin Amp Connector
- Compact Design
Retail Price: Call 800-978-4621
Your Price: Call 800-978-4621

To get a quote from Westco, please click the "Get Quote" button below or call 1-800-978-4621.
General Info Specifications Cut Sheets Options Accessories Parts Consumables
General Information

The Model AX is a full featured, single channel, single output vehicle detector that incorporates the reliable vehicle detection technology found in all of Reno A & E's vehicle detectors. All detector functions and settings are easy to configure by using a set of six external DIP switches and two internal DIP switches.


Loop Frequency: Four (4) operating frequencies (normally in the range of 20 to 100 kilohertz) are selectable by means of two front panel mounted DIP switches.

Sensitivity: Four (4) detection sensitivity levels are selectable by means of two front panel mounted DIP switches. Vehicle detection results from a sufficient negative change in loop inductance.

Sensitivity Boost: A front panel mounted DIP switch may be turned on to increase sensitivity during the Detect State. When a vehicle enters the loop detection zone, the detector sensitivity is automatically boosted to a higher level than the vacant loop setting. The boosted sensitivity level is maintained throughout the Detect State. When the vehicle leaves the loop detection zone, the sensitivity immediately returns to the vacant loop setting. This feature is particularly useful in preventing dropouts during the passage of high bed vehicles.

Presence / Pulse Modes:The detector output has two modes of operation that are selectable by means of a front panel mounted DIP switch; Presence and Pulse.

Detector Output Presence Hold Times / Pulse Modes: An internal DIP switch can be used to select the detector output presence hold time or pulse mode. When set to operate in Presence mode, the internal DIP switch can be used to select one of two presence hold times; Limited Presence or True Presence. Limited Presence will typically hold the output in the Detect state for one to three hours. True Presence will hold the output in the Detect state as long as the vehicle is present in the loop detection zone and power is not removed or reset applied. True Presence time applies only for normal size automobiles and trucks and for normal size loops (approximately 12 to 120 sq. ft.). When set to operate in Pulse mode, the internal DIP switch can be used to configure the 250 millisecond pulse output to occur when the vehicle enters the loop detection zone (Pulse-on-Entry) or when the vehicle leaves the loop detection zone (Pulse-on-Exit).

Fail-Safe / Fail-Secure Operation: The detector is factory configured for Fail-Safe or Fail-Secure operation. When the detector is configured to operate in Fail-Safe mode, the output will assume a Detect output state (relay Normally Open contacts closed, relay Normally Closed contacts open) during a power loss or loop fault condition. When the detector is configured to operate in Fail-Secure mode, the output will not respond to power losses or loop failures (relay Normally Open contacts open, relay Normally Closed contacts closed). Call Delay: A two second delay of the detector output can be activated by setting an internal DIP switch. Output delay is the time the detector output is delayed after a vehicle first enters the loop detection zone. If the Delay feature is activated, the output will only be turned on after the two second delay time has passed with a vehicle continuously present in the loop detection zone. If a vehicle leaves the loop detection zone during the delay interval, detection is aborted and the next vehicle to enter the loop detection zone will initiate a new full two second delay interval. By flashing the Detect LED at a four Hz rate with a 50% duty cycle, the detector indicates that a vehicle is being detected but that the output is being delayed.

Power Indicator: The green Power LED is Off when the detector has no power supplied or when the power level is below 75% of its nominal value. The Power LED is On when the detector is being supplied with a suitable level of power.

Detect Indicator: The red Detect LED is Off when the loop detection zone is vacant. The Detect LED is On when a vehicle is being detected. The Detect LED flashing at a four Hz rate with a 50% duty cycle indicates that the delay interval is currently timing.

Fail Indicator: The red Fail LED indicates whether or not the loop is currently within tolerance. If the loop is within tolerance, the Fail LED will be Off. If out of tolerance, the LED indicates a current loop failure by turning On (Open Loop) or flashing at a one Hz rate (Shorted Loop). If and when the loop returns to an in tolerance state, the FAIL LED will flash at a three Hz rate to indicate an intermittent loop fault has occurred and has been corrected. This flash rate will continue until another loop fault occurs, the detector is reset, or the detector loses power.

Detector Reset: Changing the position of any DIP Switch (except the Frequency DIP switches) will reset the detector. The detector can also be reset by pressing the front panel mounted pushbutton labeled RESET. After changing the Frequency selection switches (DIP switches 1 & 2), the detector must be reset.

Detect Memory: The Detect State of the detector is maintained during momentary power interruptions of up to two seconds.

Self Tuning: The detector automatically tunes and is operational within two seconds after application of power or after being reset. Full sensitivity and hold time requires 30 seconds of operation.

Environmental & Tracking: The detector is fully self-compensating for environmental changes and loop drift over the full temperature range and the entire loop inductance range.

Loop Inductance Range: 20 to 2000 microhenries with a Q factor of 5 or greater.

Loop Feeder Length: Up to 2500 feet (762 m) maximum with proper feeder cable and appropriate loops.

Loop Input: Transformer isolated. The minimum capacitance added by the detector is 0.068 microfarad.

Grounded Loop Operation: The loop isolation transformer allows operation with poor quality loops (which may include one short to ground at a single point).

Lightning Protection: The detector can tolerate, without damage, a 10 microfarad capacitor charged to 1,000 volts being discharged directly into the loop input terminals.

Electrical Isolation: The loop is isolated by means of the loop isolation transformer. The outputs are isolated by means of the output relays. Relay Output: Rated for maximum continuous current of 6.0 amps, 300 VAC maximum, 150 VDC maximum, and 180 Watts maximum switched power.

Power: 24VDC version (AX-4): 20 to 34 VDC, 50 milliamps maximum

Ruggedized Construction: The detector enclosure is made from a high temperature rated plastic. Printed circuit boards are 0.062 inch thick FR4 material with 2 oz. copper on both sides and plated through holes. Circuit board and components are conformal coated with polyurethane.

Operating Temperature: -30F to +180F (-34C to +82C).

Connector: Rear mounted 11 Pin Amphenol connector (See PIN ASSIGNMENTS table.)

Size: 2.50 inches (6.35 cm) high x 1.55 inches (3.94 cm) wide x 3.50 inches (8.89 cm) deep (excluding connector).

Weight: 7.6 oz (215.5 gm).

Power Requirements: 
20-34 VDC 
Loop Frequency Settings: 
# of Channels: 
# of Outputs: 
4 Levels 
Sensitivity Settings: 
4 Settings 
Sensitivity Boost? 
Loop Fail LED? 
Loop Inductance: 
2 to 20uH @ Q > 5 
Relay Output: 
Max 6A & 300VAC 
Rear Mounted 11 pin Amphenol 
External / Internal DIP Settings: 
6 / 2 
Temperature Range: 
-30F to 180F 
Housing Length: 
1.55 inches 
Housing Width: 
3.5 inches 
Housing Height: 
2.5 inches 
1 lb. 
Typical Lead Time: 
1 year 

There are no cutsheets for this product.
There are no options for this product.
Pre-Fabbed Vehicle Loop
Pre-Fabbed Vehicle Loop
11 Pin Detector Harness
11 Pin Detector Harness
There are no parts for this product.
There are no consumables for this product.
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