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VD921 – 11-pin 2-channel Detector

The VD921 is intended to be an ‘all-in-one’ vehicle detector. It was designed to provid accurate vehicle count information.

This device can operate in one of four selectable modes:

-Two channel directional counting

-Directional logic operation in presence or pulse

-Two independent channels operating in presence or count

-Two independent channels operating in presence or pulse

The two channel directional counting mode is the real differentiator
for this product. Directional Counting was designed as a Plug-n-Play
operation. Only the loop frequency setting is required. All other
needed information is discovered by the detector automatically when
it is first installed. The detector continually analyzes vehicles to better improve itself and automatically adjust for changes in vehicle traffic. Today’selectronics allow us to take advantage of the technology to provide a small package with many functions. This allows us to achieve to achieve accuracies not previously possible in this form factor.

The VD921 Series is intended to be an ‘all-in-one’ vehicle detector designed for the parking industry. The VD921 Series Detector was developed for systems that need accurate vehicle count information. This detector is designed to operate utilizing a dual inductive loop configuration typical in the parking industry. The small packaging comes without sacrificing performance.
The VD921 Series Detector was designed to retrofit into existing locations that may require a detector upgrade. Sophisticated algorithms offer plug -n play operation when using one of the counting modes.
The VD921 Series offers a model that provides a contact closure for a loop failure condition. When wired to a system input, this allows the user to receive real-time status of the overall detection system.
The two-channel directional counting mode is the real differentiator for this product. Directional counting was designed as a plug-n-play operation. Only the loop frequency setting is required. All other needed information is discovered by the detector automatically when it is first installed. The detector analyzes vehicles to automatically adjust for loop size, differences in sensitivity between the two loops being used, and the types of vehicles normally seen.
The detector continually analyzes vehicles to better improve itself and automatically adjust for changes in vehicle traffic. This allows this small but mighty detector to achieve accuracies not previously possible in this form factor.
The multiple operating modes allow technician to only need one detector to replace most existing detectors, greatly reducing the inventory needed by the facility operator or the maintaining technician.
For best directional counting accuracies, both loops should be the same size and two to four feet apart.

  • High Accuracy Directional Counting

Tailgating, back-outs, and parking maneuvers are identified and handled correctly.

  • No Training Devices

The detector's alorithm is designed to capture its environment needing no user interface.

  • Count analysis information is automatically saved in case of power loss and re-used on power up.
  • Selectable mode of operation that allows this one detector to fill many needs.
  • Available in several industry standard pin outs.
  • Advanced channel scanning technology with superior noise tolerance.
  • Single low voltage unit for operation on 10 volts to 30 volts AC or DC.
  • Self-resetting fuse to protect against accidentally connecting the unit to the wrong voltage and damaging it.

The VD921 Series Detector was designed to retrofit into existing locations that may require a detector upgrade.  Sophisticated algorithms offer plug-n-play operation when using one of the counting modes.  Only the loop frequency is required.

VD921 - click to download

The VD921 Series is intended to be an ‘all-in-one’ vehicle detector designed for the parking industry.  The DSP-21 Series Detector was developed for systems that need accurate vehicle count information.  This detector is designed to operate utilizing a dual inductive loop configuration typical in the parking industry. The small packaging comes without sacrificing performance.

The VD921 Series Detector was designed to retrofit into existing locations that may require a detector upgrade. Sophisticated algorithms offer plug -n play operation when using one of the counting modes.

The VD921 Series offers a model that provides a contact closure for a loop failure condition. When wired to a system input, this allows the user to receive real-time status of the overall detection system.

The two-channel directional counting mode is the real differentiator for this product. Directional counting was designed as a plug-n-play operation.  Only the loop frequency setting is required. All other needed information is discovered by the detector automatically when it is first installed. The detector analyzes vehicles to automatically adjust for loop size, differences in sensitivity between the two loops being used, and the types of vehicles normally seen.

The detector continually analyzes vehicles to better improve itself and automatically adjust for changes in vehicle traffic. This allows this small but mighty detector to achieve accuracies not previously possible in this form factor.

The multiple operating modes allow technician to only need one detector to replace most existing detectors, greatly reducing the inventory needed by the facility operator or the maintaining technician.

For best directional counting accuracies, both loops should be the same size and two to four feet apart.

{No Information Available}

11-Pin Detector Detector Terminals Additional Information Diablo Equivalent
Pin-1 Pin-2 Pin-3 Pin-4 Pin-5 Pin-6 Pin-7 Pin-8 Pin-9 Pin-10 Pin-11
LD400

Procon

Live Neutral Relay 1 Relay 1 Relay 2 Relay 2 Relay 3 Relay 3 Earth Relay 4 Relay 4 Relay output states set VD911 Version 1.X
230vAC

or 12v AC/DC

GND N/C or NO COM N/C or NO COM N/C or NO COM EARTH N/C or NO COM
FT0041

Nortech

Live Neutral Relay 1 Relay 1 Relay 2 Relay 2 Loop Loop Earth Pres Pulse Relay None VD911 Version 1.X
230v DC GND N/O COM N/O COM Loop Loop EARTH NC NC
PD134

Nortech

Live Neutral Relay 1 Relay 1 Relay 2 Relay 2 Loop Loop Earth Relay 1 Relay 2 None VD911 Version 1.X
12/24v DC GND COM N/O COM N/O Loop Loop EARTH NC NC
ULD913

Sensable

Live Neutral Relay 1 Relay 1 Relay 2 Relay 2 Loop Loop Earth Relay 1 Relay 2 None VD911 Version 1.X
12/24v DC GND N/O COM N/O COM Loop Loop EARTH NC NC
FLUX11

Centurion

Live Neutral Relay 1 Relay 1 Relay 2 Relay 2 Loop Loop Earth Relay 1 Relay 2 None VD911 Version 1.X
12/24v DC GND N/O N/C N/O N/C Loop Loop EARTH COM COM
LDP1/24

Nortech

Earth Neutral Relay 1 Relay 1 Relay 2 Relay 2 Loop Loop Live Relay 1 Relay 2 None VD911 Version 1.X
EARTH GND N/O N/C N/O COM Loop Loop 12/24 vDC COM N/C
VD921 Manufacturer Manual