Diablo DSP-20-LV Manuel utilisateur

Diablo Controls, Inc.

Document: DSP20_MAN_A

Released: March 30, 2014

Pros Who Know Trust Diablo

User Manual

DSP-20

Dual Channel Vehicle Detector

With Directional Logic

DSP-20 User Manual Page 2 of 22 DSP20_MAN_A

1. Contents

2. Introduction........................................................................................................................................................3

3. Technical Data ....................................................................................................................................................4

Functional Data.......................................................................................................................................................4

Electrical Data.........................................................................................................................................................4

Environmental Data................................................................................................................................................4

Mechanical Data.....................................................................................................................................................5

4. Features and Functions ......................................................................................................................................6

Operating Modes....................................................................................................................................................6

Presence Detection.................................................................................................................................................6

Pulse Detection.......................................................................................................................................................7

Sensitivity................................................................................................................................................................7

Sensitivity Boost .....................................................................................................................................................7

Fail-Safe vs Fail-Secure ...........................................................................................................................................7

Fail-Safe ..................................................................................................................................................................8

Fail-Secure ..............................................................................................................................................................8

Detector Reset........................................................................................................................................................8

Channel Reset.........................................................................................................................................................8

Indicators................................................................................................................................................................9

5. Installation........................................................................................................................................................12

Detector Installation.............................................................................................................................................12

Loop Installation ...................................................................................................................................................12

6. Configuration....................................................................................................................................................15

DIP Switches .........................................................................................................................................................15

Wiring ...................................................................................................................................................................17

7. Troubleshooting ...............................................................................................................................................19

No Power LED .......................................................................................................................................................19

Flashing Power LED...............................................................................................................................................19

A Channel LED Flashes Slowly (1 Hz) ....................................................................................................................19

A Channel LED Flashes Quickly (5 Hz)...................................................................................................................20

A Channel LED Shows Two Quick Flashes Once Every Two Seconds ...................................................................20

A Channel LED Intermittently Comes On / Stays On Without a Vehicle Present.................................................21

A Channel LED Will Not Come On With a Vehicle Present...................................................................................22

DSP-20 User Manual Page 3 of 22 DSP20_MAN_A

2. Introduction

The DSP-20 is intended to be a general purpose two channel vehicle detector designed for the parking and

access control industries. The small package is powered by a high performance 16-bit microcontroller that does

not skimp on performance.

The DSP-20 can operate as two independent channels or in a directional logic mode that allows the detector to

activate an output based on the vehicle’s direction of travel.

The DSP-20 is a dual channel detector that uses advanced channel scanning technology to provide superior noise

tolerance. The scanning technology allows for placement of loops closer together (even overlapping) than ever

possible with single channel detectors.

The DSP-20 continually monitors the loop circuit looking for conditions that would signify a fault in the loop

circuit and displays the type of fault identified. This helps quickly identify open or shorted loops. Fault memory

alerts the user to past faults that have automatically been recovered from.

Diablo Controls’ unique flicker display helps insure correct operation of a channel when it is operating in the

pulse mode. The channel’s detect LED will turn on while the pulse is being output then display the flicker mode

while the channel is still detecting the vehicle. This allows easy identification of a locked up channel operating in

the pulse mode.

The DSP-20 is available in three different operating voltages and four different pin outs. This allows you to select

the detector that exactly matches your installation instead of rewiring your installation to match the detector

that you have.

DSP-20 User Manual Page 4 of 22 DSP20_MAN_A

3. Technical Data

Functional Data

Sensitivity: Four sensitivities selectable for presence or pulse modes of operation.

Low .50% ΔL/L

Medium Low .10% ΔL/L

Medium High .05% ΔL/L

High .02% ΔL/L

Frequency Settings: There are two settings per channel. The actual loop frequency is dependent on

loop circuit inductance. The detector uses a channel scanning technology to

minimize channel to channel interference.

Pulse Output: 150 millisecond on period followed by a 150 millisecond off period before the

next pulse can begin.

Response Time: 150 milliseconds

Vehicle Hold Time: Approximately 1 hour for a vehicle detection of 1% ΔL/L.

Electrical Data

Loop Inductance: 20 microhenries to 1500 microhenries (including lead-in inductance)

Operating Voltages: Three power versions

10.5 volts to 30 volts AC or DC with over voltage protection

100 volts to 135 volts AC

200 volts to 270 volts AC

Operating Current: 10-30 volts DC/AC - 65 milliamps maximum. 50 milliamps typical.

100-135 volts AC - 30 milliamps maximum. 25 milliamps typical.

200-270 volts AC - 15 milliamps maximum. 12 milliamps typical.

Output Relay Rating: 3 amps @ 125 volts

Environmental Data

Operating Temperature: -35°F to 165°F (-37°C to 74°C)

Storage Temperature: -40°F to 176°F (-40°C to 80°C)

Humidity: Up to 95% relative humidity non-condensing

DSP-20 User Manual Page 5 of 22 DSP20_MAN_A

Mechanical Data

Mounting Position: Any

Housing Material: Lexan

Housing Size: 2.36 inches (High) x 1.75 inches (Wide) x 4.09 inches (Deep)

59.94mm (High) x 4.45mm (Wide) x 10.39mm (Deep)

DSP-20 User Manual Page 6 of 22 DSP20_MAN_A

4. Features and Functions

Operating Modes

There are two selectable operating modes. Both channels of the detector will operate in the same operating

mode. The two operating modes are:

Normal - Two Individual Channels with Pulse or Presence – In this operating mode the detector

operates as two individual detectors. Either channel can operate in the pulse or presence mode. This

matches the operation of a standard detector.

Directional Logic - Two Paired Channels with Directional Logic – In this operating mode the detector

operates as two logically interconnected detectors for the purpose of determining direction of travel

over two loops. The two loops are in the same travel lane and close enough together that any vehicle to

be detected will be detected by the second loop before being dropped by the first. The output begins

when the second loop detects the vehicle. The output can be pulse or presence for either channel.

Presence Detection

The channel output will remain activated as long as a vehicle is detected over the loop. After four minutes of

continuous detection, the detector will begin to slowly retune the detector channel with the goal of tuning out

DSP-20 User Manual Page 7 of 22 DSP20_MAN_A

the vehicle that stalled or parked on the loop. The retuning process takes about an hour to complete with a

vehicle detection of 1% ΔL/L. When the retuning process is complete, any loop area that vehicles can still travel

over will still detect the vehicle as expected. Once the vehicle leaves, the detector will recover from the

retuning process within 1 second.

This detector does not have a permanent presence or infinite presence detection mode.

This feature is activated for each channel individually.

Pulse Detection

The pulse mode used is commonly referred to as Pulse On Entry.

If the channel is the normal mode of operation (Two Individual Channels with Pulse or Presence), the channel

will output a pulse when the vehicle is first detected and will not output again until the loop is no longer

occupied.

If the detector is in the directional logic mode of operation (Two Paired Channels with Directional Logic), the first

channel to detect the vehicle will output a pulse when the second loop detects the vehicle while the first

channel is still detecting the vehicle. The detector will not output another pulse until both loops are no longer

occupied.

Sensitivity

The detector has four user selectable sensitivity levels for each channel. In most situations the Medium Low or

Medium High setting will work effectively.

Sensitivity Boost

The detector has a user selectable feature that increases the sensitivity of a channel after initial detection. This

feature is active for both channels when selected. This feature is most often used to allow a channel to have a

lower starting sensitivity and then increase it after a vehicle has been detected. This is very useful in situations

where high-bed tractor-trailer vehicles will be passing over the loop. With this feature the detector may be able

to detect the high-bed portion of the vehicle without having to be overly sensitive and susceptible to false

detections. NOTE: If detection of high-bed tractor-trailers is required, correctly sized loops must be used.

Fail-Safe vs Fail-Secure

Here’s a little note on fail-safe versus fail-secure operation. In general, a fail-safe detector will output “detect”

when the loop circuit is failed. This is always useful on a safety loop to prevent accidental closure of a gate arm

on a vehicle. On the free exit loop this will keep the gate open until the situation is fixed. This is useful in

applications where it is important to allow traffic flow to continue. A fail-secure detector will never output

“detect” when the loop circuit is failed. This will keep the gate closed. This is useful in high-security areas or

installations where containment is needed.

DSP-20 User Manual Page 8 of 22 DSP20_MAN_A

Fail-Safe

When a channel is in the presence mode of operation and a loop failure is detected on that channel, the output

for that channel will stay activated during the failure. In gate applications this feature is used to automatically

open the gate if a loop fails. This feature is active for both channels when selected.

It should be noted that a power failure will always result in a fail-secure operation. Fail-safe operation is only

available when a valid input voltage is applied to the detector. Channels configured for pulse output will always

operate in the fail-secure mode.

Fail-Secure

When a channel is in the presence mode of operation and a loop failure is detected on that channel, the output

for that channel will stay deactivated during the failure. In gate applications this feature is used to keep the gate

closed if a loop fails. This feature is active for both channels when selected.

It should be noted that a power failure will always result in a fail-secure operation. Channels configured for

pulse output will always operate in the fail-secure mode.

Detector Reset

When the state of any of the DIP switches 1 through 4 are changed, the detector will perform a detector wide

reset which will include resets for both channels. These four switches control functions that modify the

operation of the entire detector. Therefore, to insure that the changes are implemented correctly from the

current operating mode, all functions of the detector are reset as if the unit had just powered up with the new

settings.

All LEDs will turn off for 500 milliseconds at the start of the reset event, then on for 1 second, then off for

another 500 milliseconds before returning to their normal states. The detector will not output any detections or

pulses during this two second reset period. If a prior loop fault is being displayed for either channel, it will be

cleared.

Channel Reset

When the state of any of the DIP switches 5 through 12 are changed, the detector will perform a channel reset

for the appropriate channel. Channel 1 will be reset with changes to switches 9 through 12. Channel 2 will be

reset with changes to switches 5 through 8. These switches control functions that modify the operation of a

channel of the detector. Therefore, to insure that the changes are implemented correctly from the channel’s

current operating mode, all functions of the channel are reset as if the unit had just powered up with the new

settings.

The appropriate detect LED and the power LED will turn off for 500 milliseconds at the start of the reset event,

then on for 1 second, then off for another 500 milliseconds before returning to their normal states. The channel

will not output any detections or pulses during this two second reset period. If a prior loop fault is being

displayed for the channel, it will be cleared.

DSP-20 User Manual Page 9 of 22 DSP20_MAN_A

Indicators

The DSP-20 is equipped with three LED indicators: Power (Green), Detect A (Red), and Detect B (Red).

Power LED – The green power LED has four possible states:

OFF The voltage applied to the detector is less than the minimum display

voltage of approximately 3.5 volts.

LOW VOLTAGE The LED will flash at a once per second rate with 500 milliseconds of on

time and 500 milliseconds of off time. While in this mode, the relay

outputs will not function.

RESET The LED will turn off for 500 milliseconds at the start of the reset event

(a DIP switch change), then on for 1 second, then off for another 500

milliseconds before returning to the normal state.

NORMAL The LED is always on when the detector is in its normal state of

operation.

Detect A – The red Detect A LED is used to display the status of channel 1. There are several different

statuses that can be displayed on this LED:

Open Loop When the detector senses that the loop is open or the inductance is too

high, the LED will turn on for 500 milliseconds then off for 500

milliseconds for the duration of the fault.

If the fault is corrected, the LED will display the Prior Fault indication.

Shorted Loop When the detector senses that a loop is shorted or the inductance is too

low, the LED will turn on for 100 milliseconds then off for 100

milliseconds for the duration of the fault.

If the fault is corrected, the LED will display the Prior Fault indication.

Large Change When the detector senses that an inductance change of more than

12.5% has occurred, the LED will turn on for 500 milliseconds, off for

DSP-20 User Manual Page 10 of 22 DSP20_MAN_A

100 milliseconds, on for 100 milliseconds, off for 100 milliseconds, on

for 100 milliseconds, off for 100 milliseconds and then repeat the entire

sequence for the duration of the fault.

If the fault is corrected, the LED will display the Prior Fault indication.

Prior Fault The detector is equipped with the ability to remember prior faults that

have occurred since the last power interruption or reset (changing a DIP

switch). The LED will turn on for 100 milliseconds, off for 100

milliseconds, on for 100 milliseconds, off for 1700 milliseconds and then

repeat the sequence until power is cycled, the detector reset, or the

channel reset.

The Prior Fault indication is only displayed when the loop is unoccupied

or when the channel is in the pulse mode of operation and currently is

occupied.

Reset When the detector or the channel is reset (a reset occurs automatically

at power up), the LED will turn off for 500 milliseconds, on for 1000

milliseconds, off for 500 milliseconds and then resume its normal

display.

Occupancy When the channel is operating in the pulse mode and currently is

occupied the LED will be turned on to a dimmer level than normal and

the LED will be flashed at a very fast rate that will make it look like it is

flickering.

This display is meant to be easily distinguishable from the normal on

display. With this additional display mode, the pulse mode of operation

can easily be monitored for correct operation.

A look at the following figure will show how this occupancy indication is

used to provide additional information in each of the possible modes of

Ce manuel convient aux modèles suivants

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