Diablo Controls DSP-15 Manuale utente

DSP15_MAN_C 11/27/18 Page 1 of 23 Pros Who Know Trust Diablo

User Manual

DSP-15

Vehicle Detector

DSP-15-T

Terminal Block

DSP-15-M

Male Molex

DSP-15-F

Female Molex

DSP-15 User Manual Page 2 of 23 DSP15_MAN_C

1. Contents

Figures ....................................................................................................................................................................3

2. Introduction ...........................................................................................................................................4

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

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

Electrical Data.........................................................................................................................................................5

Environmental Data................................................................................................................................................5

Mechanical Data.....................................................................................................................................................6

4. Features and Functions...........................................................................................................................7

Detector Reset........................................................................................................................................................7

Presence Detection.................................................................................................................................................7

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

Fail-Safe vs Fail-Secure ...........................................................................................................................................8

Sensitivity................................................................................................................................................................8

Frequency (DIP Switches 1 and 2) ..........................................................................................................................9

Fail Memory (DIP Switch 3) ....................................................................................................................................9

Extended Presence (DIP Switch 4)..........................................................................................................................9

Output B Selection (DIP Switches 5 and 6)...........................................................................................................10

Sensitivity Boost (DIP Switch 7) ............................................................................................................................12

Extension (DIP Switches 8 and 9) .........................................................................................................................12

2 Sec. Delay (DIP Switch 10) .................................................................................................................................12

Indicators..............................................................................................................................................................13

5. Installation ...........................................................................................................................................16

Detector Installation.............................................................................................................................................16

Loop Installation ...................................................................................................................................................16

6. Troubleshooting ...................................................................................................................................20

No Power LED .......................................................................................................................................................20

Power LED Flashes On Once Every 2 Seconds ......................................................................................................20

Power LED Flashes Slowly (1 Hz) ..........................................................................................................................20

Power LED Flashes Quickly (5 Hz).........................................................................................................................21

Power LED Shows Two Quick Flashes Once Every Two Seconds..........................................................................21

Detect LED Intermittently Comes On / Stays On Without a Vehicle Present.......................................................22

Detect LED Will Not Come On With a Vehicle Present.........................................................................................23

DSP-15 User Manual Page 3 of 23 DSP15_MAN_C

Figures

Figure 1: Physical Dimensions ....................................................................................................................................6

Figure 2: Outputs with No Delay or Extension ........................................................................................................ 10

Figure 3: Outputs with Delay................................................................................................................................... 11

Figure 4: Outputs with Extension ............................................................................................................................ 11

Figure 5: Outputs with Delay and Extension ........................................................................................................... 11

Figure 6: Power LED States...................................................................................................................................... 14

Figure 7: Detect LED States ..................................................................................................................................... 15

Figure 8: Loop Installation ....................................................................................................................................... 18

DSP-15 User Manual Page 4 of 23 DSP15_MAN_C

2. Introduction

The DSP-15 Detector is intended to be a top of the line single channel detector. Many features have been

included which are normally found only on more expensive models. The small package is powered by a high-

performance 8-bit microcontroller that does not skimp on performance. The DSP-15 Detector was designed to

retrofit into existing locations that may require a detector upgrade.

The detector uses a 10-pin terminal block, male Molex, or female Molex for connections.

3. Technical Data

Functional Data

Sensitivity: Ten sensitivities are user selectable.

Setting

Sensitivity

Setting

Sensitivity

.48% ΔL/L

.08% ΔL/L

.32% ΔL/L

.06% ΔL/L

.24% ΔL/L

.04% ΔL/L

.16% ΔL/L

.03% ΔL/L

.12% ΔL/L

.02% ΔL/L

Frequency Settings: There are four frequency settings available. The actual loop frequency is

dependent on loop circuit inductance.

DIP Switch

Frequency

OFF

High

OFF

Medium High

OFF

Medium Low

Low

B Pulse Output: 250ms ±15ms.

Response Time: Response time is dependent on the sensitivity selected.

Setting

Respo

nse Time

Setting

Response Time

70ms ±10ms

140ms ±20ms

70ms ±10ms

140ms ±20ms

70ms ±10ms

140ms ±20ms

70ms ±10ms

140ms ±20ms

Vehicle Hold Time: In Normal Presence Mode: Approximately 1 hour for a detection of 1% ΔL/L.

In Extended Presence Mode: Approximately 19 hours for a detection of 1% ΔL/L.

DSP-15 User Manual Page 5 of 23 DSP15_MAN_C

Electrical Data

Loop Inductance: 20 microhenries to 1500 microhenries (including lead-in inductance). Not all

frequency settings are available at inductances below 30 microhenries.

Operating Voltages: 10.5 volts to 30 volts AC or DC with over voltage protection

Output Relay Rating: 3 amps @ 125 volts

Current Draw: 10.5 volts to 30 volts AC or DC 75 milliamps maximum.

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-15 User Manual Page 6 of 23 DSP15_MAN_C

Mechanical Data

Mounting Position: Any

Housing Material: Bare PC Board

Housing Size: .768 inches (High) x 2.90 inches (Wide) x 4.125 inches (Deep)

19.51 mm (High) x 73.66 mm (Wide) x 104.77 mm (Deep)

Figure 1: Physical Dimensions

DSP-15 User Manual Page 7 of 23 DSP15_MAN_C

4. Features and Functions

Detector Reset

When any of the 10-position DIP switches or the 10-position rotary switch is changed, the detector will perform

a detector wide reset. Both LEDs will turn off for 500 milliseconds at the start of the reset event, then on for 500

milliseconds, and then it will indicate if the internal setting is for Fail-Safe or Fail-Secure configuration of the

detector. For Fail-Safe the LEDs will be on for another 500 milliseconds then off for 500 milliseconds before

returning to their normal states. For Fail-Secure the LEDs will flash at 50 milliseconds on and 50 milliseconds off

rate for another 1000 milliseconds before returning to their normal states. The detector will not output any

detections during this two second reset period. If a prior loop fault is being displayed it will be cleared. If a

vehicle is over the loop during the reset period it will not be detected.

Presence Detection

The A output will always operate in the presence detection mode. The Delay and Extend features may modify

the output behavior. Once activated, the 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 with the

goal of tuning out the vehicle that stalled or parked on the loop over a relatively long time. The retuning process

takes about an hour to complete in the Normal Presence mode and about 19 hours in the Extended Presence

mode 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.

The B output can be set to operate in the True Presence mode. In this mode the B output activates as soon as a

vehicle enters the loop and drops as soon as the loop is no longer occupied. The output will ignore any Delay or

Extend features that are currently active.

Pulse Detection

The B output can be configured for Pulse on Entry or Pulse on Exit operation. The pulse generated by the output

will be 250 milliseconds long. The B output will follow any Delay or Extend features that are currently active.

Pulse operation is not available on the A output.

In Pulse on Entry mode, the B output will pulse when the A output activates. If the delay feature is enabled, the

pulse will not occur until the delay has timed out and the loop is still occupied. The output will not pulse again

until the loop has been unoccupied, and any enabled extension has timed out.

In Pulse on Exit mode, the B output will pulse when the A output deactivates. If one of the extension features is

enabled, the pulse will not occur until the extension has timed out and the loop is still vacant. The output will

not pulse again until the loop has been reoccupied and any enabled delay has timed out.

DSP-15 User Manual Page 8 of 23 DSP15_MAN_C

Fail-Safe vs Fail-Secure

Here’s a little note on fail-safe versus fail-secure operation. On the DSP-15, the option for fail-safe or fail-secure

only applies to the A output. In general, a fail-safe detector will activate the output when the loop circuit is

failed. This is 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. Fail-safe is used in applications where it is important

to allow traffic flow to continue. A fail-secure detector will not activate the output 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.

The B output is always fail-secure when not in the fail output mode.

The DSP-15 is one of the few vehicle detectors that honors fail-safe and fail-secure even in the absence of

power. Inside the unit, on the main PC board, are three jumpers that set the failure mode. When placed in the

fail-safe position, the A output relay will be fail-safe in the absence of adequate voltage. If placed in the fail-

secure position, the reverse is true. The jumpers are factory set to be fail-safe. All three jumpers must be set to

the same setting. Not doing this will cause incorrect operation of the A output.

Sensitivity

The detector has ten user selectable sensitivity levels. In most situations the medium sensitivity 5 setting will

work effectively. For those situations where setting 5 is not sensitive enough, raise the sensitivity one level at a

time until the desired performance is obtained. For those situations where the detector is oversensitive, lower

the sensitivity one level at a time until the desired performance is obtained. The sensitivity is factory set to 5.

Like most inductive loop vehicle detectors, the DSP-15 directly measures the change in frequency of the loop

and from there, calculates the change in inductance when a vehicle interacts with it. The change in inductance

is measured as %ΔL/L (reads as “percent delta L over L”).

For the ten sensitivities, the thresholds are:

Setting

Sensitivit

Setting

Sensitivity

.48% ΔL/L

.08% ΔL/L

.32% ΔL/L

.06% ΔL/L

.24% ΔL/L

.04% ΔL/L

.16% ΔL/L

.03% ΔL/L

.12% ΔL/L

.02% ΔL/L

DSP-15 User Manual Page 9 of 23 DSP15_MAN_C

Frequency (DIP Switches 1 and 2)

Another important variable is loop frequency. When loops are installed sufficiently far apart, any two loops will

not interfere with each other. However, if two loops are fairly close together, say two to four feet apart, the

inductive fields may couple together and may interact causing intermittent false detections. The two main

variables for inductive coupling are distance and frequency separation. To aid in avoiding inductive coupling,

each DSP-15 unit comes with two frequency switches. They are binary coded allowing up to four different

frequencies to operate within. If there are suspicions that one of the two loops are interacting, simply change

one of the two unit’s frequency settings.

DIP Switch

Frequency

OFF

High

OFF

Medium High

OFF

Medium Low

Low

Fail Memory (DIP Switch 3)

Normal operation is that during a loop failure, the green Power LED will indicate what type of loop failure (open,

short, or large ΔL/L). During the loop failure the red Detect LED and output A will be active for fail-safe

operation or inactive for fail-secure operation. If the loop recovers from its failure, the red and green LEDs,

along with its two relay outputs, will operate normally again. However, when Fail Memory is enabled, the green

LED will continue to indicate a previous failure by blinking 1850 milliseconds on, 50 milliseconds off, 50

milliseconds on again, and then 50 milliseconds off. This blinking sequence will repeat until a reset or power

cycle occurs. Note that the red LED and relay outputs will continue to work normally.

Extended Presence (DIP Switch 4)

Under normal conditions, the DSP-15 will hold a vehicle presence for a reasonable amount of time. If a vehicle

parks over the loop and the detector measures a 1% ΔL/L, it will slowly tune that vehicle out over a period of

about one hour. For those instances where a longer period is desired, extended presence will hold that same

vehicle for about 19 or 20 hours. This is quite a long time, but it isn’t infinite. The DSP-15 does not have infinite

presence.

DSP-15 User Manual Page 10 of 23 DSP15_MAN_C

Output B Selection (DIP Switches 5 and 6)

Output B can be programmed to operate in one of four different modes that are selected using DIP switches 5

and 6. The following table identifies these four modes:

DIP Switch

Output B Mode

of Operation

OFF

True Presence

OFF

Pulse

n Entry

OFF

Pulse

n Exit

Fail

True Presence: The B output will be energized whenever a vehicle is present over the loop detection area. The

A output can be modified by the delay and/or extension timing settings. The B output will not use these timing

settings. For example, if 2 seconds of delay is set, output B will energize as soon as the vehicle is detected, while

output A will wait for two seconds of continuous presence prior to energizing.

Pulse on Entry: Every time the loop is occupied, a single 250 milliseconds pulse will be output on the B output.

Pulse on Exit: Every time the loop becomes vacant or a vehicle is tuned out, a single 250 milliseconds pulse will

be output on the B output.

Fail: If the DSP-15 recognizes some type of loop failure, a continuous output on the B output will be given. The B

output will remain activated until the failure is corrected.

The following figures show the effects of delay and extension on the A & B outputs. The numbers between

edges are the number of seconds in that period.

Figure 2: Outputs with No Delay or Extension

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