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DSP-22-1 User Manual

Page 4 of 22

DSP-22-1_MAN_D

1.

Introduction

The DSP-22-1 detector is intended to be a single channel detector that can work with both inductive loops as well
as the new Diablo Control Free-exit probe. The detector is powered by a high-performance 8-bit microcontroller
that does not skimp on performance. The DSP-22-1 detector has a small footprint and was designed to directly
plug into many DoorKing operators.

The detector uses a 3-pin Molex connector for its power connections and the Channel 1 solid state output.

Figure 1: Product Views

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Summary of Contents for DSP-22-1

Page 1: ...DSP 22 1_MAN_D 11 23 2020 Page 1 of 22 Pros Who Know Trust Diablo User Manual DSP 22 1 Low Power Single Channel Vehicle Detector with Support for the Free exit Probe ...

Page 2: ... Channel 1 Loop Probe DIP Switch 5 9 Indicators 9 3 Installation 12 General Rules and Best Practices for Inductive Loops 12 Detector Installation 13 Loop Installation 14 Free exit probe Installation 17 4 Troubleshooting 19 No Power LED 19 Detect LED Flashes On Once Every Two Seconds 19 Detect LED Flashes On Twice Every Two Seconds 19 Detect LED Flashes at the Same Time as the Power LED every Two S...

Page 3: ... Product Views 4 Figure 2 Physical Dimensions 6 Figure 3 Loop Installation 16 Figure 4 Saw Cut for Home Run Exit and Chiseled Corner for Home Run Exit 16 Figure 5 Typical Free exit probe Installation 17 Figure 6 Side of Driving Surface Free exit probe Installation 18 ...

Page 4: ...as the new Diablo Control Free exit probe The detector is powered by a high performance 8 bit microcontroller that does not skimp on performance The DSP 22 1 detector has a small footprint and was designed to directly plug into many DoorKing operators The detector uses a 3 pin Molex connector for its power connections and the Channel 1 solid state output Figure 1 Product Views ...

Page 5: ... This mode allows very weak detections to be held for about 15 minutes Strong detections can be held for very long periods of time days or even weeks as long as power is not interrupted 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 Voltage 14 volts to 27 volts...

Page 6: ... of 22 DSP 22 1_MAN_D Mechanical Data Mounting Position Any Housing Material Lexan Detector Size 4 300 inches High x 2 950 inches Wide x 820 inches Deep 109 22 mm High x 74 93 mm Wide x 20 83 mm Deep Figure 2 Physical Dimensions ...

Page 7: ...or is overly sensitive lower the sensitivity one level at a time until the desired performance is obtained Remember that semi trucks look much smaller than a car So do not set or test the sensitivity using a passenger vehicle if semi truck traffic will be seen over the loop The factory default is low DIP switch 1 OFF and DIP switch 2 OFF Like most inductive loop vehicle detectors the DSP 22 1 dire...

Page 8: ...ect channel so that their inherent frequencies are sufficiently different as to no longer interact If the loops are the same size and number of turns setting one channel to high and the other channel to low will provide the maximum frequency separation DIP Switch Frequency 1 2 OFF OFF Channel 1 High OFF ON Channel 1 Medium High ON OFF Channel 1 Medium Low ON ON Channel 1 Low Channel 1 Presence Pul...

Page 9: ...t 1 seconds and retune reset that channel In the probe mode of operation the detector will only hold a detection for 1 second Therefore if a vehicle stays over the probe for more than 1 second it may generate additional pulses for the same vehicle DIP Switch 4 Function OFF Channel 1 Presence Mode ON Channel 1 Pulse Mode Channel 1 Loop Probe DIP Switch 5 The DSP 22 1 is capable of operating with ei...

Page 10: ...ity change or power cycle the LED will turn off for 500 milliseconds on for 500 milliseconds blink repeatedly with 50 milliseconds on followed by 50 milliseconds off for one second and then display its normal state Detect The LED is on constantly when a vehicle is detected Open Loop When the detector senses that the loop is open or the inductance is too high the LED will flash once every two secon...

Page 11: ...high speed mode of operation green LED is ON and the channel is not in detect the LED will flash on one two or three times depending upon the prior failure type When the detector is in the low power mode Green LED flashes on once every 2 seconds the channel Detect LED will flash on at the same time ...

Page 12: ...ed to reduce the loop wire bend angle to not exceed 45 degrees at any location 5 Use backer rod to hold the loop wire at the bottom of the saw cut before sealing the loop The backer rod should be cut into 1 inch pieces and one placed every foot or so as needed 6 If a loop installation will cross an expansion joint in the roadway surface some method of leaving some slack wire at the joint should be...

Page 13: ...f the source is overhead or below ground power lines the saw cut should be parallel to the short side of the loop The loop wire is placed in the saw cuts using a figure 8 motion A figure 8 loop will have more inductance that a similar sized conventional loop 14 If multiple loops are to be connected to the same detector there are several things to be aware of a Always connect multiple loops in seri...

Page 14: ...with an XLP jacket such as XHHW THHN or similar wire types should never be used for loop wire The gauge of the wire to use depends on two factors Distance in cable feet from the loop to the detector and stresses the wire may see The gauge of the wire can be 20 AWG as long as the detector is within 50 feet of the loop in cable distance For 50 to 100 feet use at least 18 AWG wire At greater than 100...

Page 15: ...ot causing loop failure The saw slot should be deep enough that the loop wire will have a minimum of of sealant over the top wire in the slot More is better Going too deep with the saw cut is also a concern Deep cuts in a road surface may impact the structural strength of the roadway especially if any reinforcement material is cut Using a smaller gauge of wire will allow for shallower saw cuts The...

Page 16: ...SP 22 1 User Manual Page 16 of 22 DSP 22 1_MAN_D Figure 3 Loop Installation Figure 4 Saw Cut for Home Run Exit and Chiseled Corner for Home Run Exit BACKER ROD PIECE LOOP WIRE SAW CUTS DETAIL A DETAIL B ...

Page 17: ...at it fits snugly in the saw slot Use a blunt object not a screwdriver to press the backer rod pieces down into the saw slot as far as they will go Keeping the loop wire at the bottom of the saw slot allows the loop sealant to provide the maximum amount of protection possible from foreign object penetration Never use a continuous piece of backer rod over the loop as this would prevent the loop sea...

Page 18: ...ement NOTE When the roadway is greater than 11 feet wide requiring a greater detection zone you have the option to add a second Free exit probe to the opposing side of the roadway The probes must be wired in series Figure 6 Side of Driving Surface Free exit probe Installation ...

Page 19: ...s below 5 ohms the loop inductance should be checked This is done using an inductance meter The inductance of the loop should be less than 1500 microhenries It is very unusual to have a loop with an inductance value this high but it is possible with very large loops and many turns If the loop inductance value is above 1500 microhenries the loop will have to be replaced with a loop with less induct...

Page 20: ...s in the loop wire should be redone If there are any wire nuts used in the loop circuit remove them and replace with a crimp connection or preferably a soldered connection The open loop fault could also be a fatigued point in the loop wire This can occur at locations where the loop wires cross an expansion joint in the road surface Any place where the loop wires must move even if only a very tiny ...

Page 21: ...sible source for electrical interference depending on its proximity to the loop and the amount of energy being used If you believe the loop is experiencing electrical interference turn off the device believed to be the source of the interference and see if the problem goes away Sometimes this is not possible and more technical means are needed to help identify the source Call Technical Support in ...

Page 22: ...igh is the correct setting However to compensate for some unusual loop geometries this setting may be inadequate Adjust the sensitivity one level higher and recheck the detector for proper detection If the channel sensitivity is set to high and the red LED still does not come on and you have another operating detector swap the loops between a working detector and a failing detector If the problem ...

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