DSP-10 User Manual
Contents
1. The red detect LED is used to display the status of the A output There are several different statuses that can be displayed on this LED Off No vehicle present in the detection area Reset in Fail safe At the start of a reset event a DIP switch change sensitivity change or power cycle the LED will turn off for 500 milliseconds on for 500 milliseconds off for 500 milliseconds on for 500 milliseconds and then finally display its normal state Reset in Fail secure At the start of a reset event a DIP switch change sensitivity 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 Delay Interval A vehicle has been detected but the A output is not activated due to the 2 second delay feature being active The LED will turn on for 200 milliseconds and then off for two hundred milliseconds If the vehicle leaves the detection area before the two second delay interval expires the LED will return to the off state If the vehicle is still present after 2 seconds the LED will become solid and the A output will be activated DSP 10 User Manual Page 14 of 23 DSP10 MAN_A Extension Interval A vehicle was detected but the detection zone is now empty and an extension interval is being timed The extension interval can be programmed for no extension 2 seconds 5 seconds or 10 seconds2. 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 10 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 AL L reads as percent delta L over L For the ten sensitivities the thresholds are O 48 ALL 5 08 AL L 2 1 82 ALL 6 06 AL L 24 AL L 04 AL L 16 AL L_ 8 03 ALL 4 PNL 9 02 AL L Frequency DIP Switches 9 and 10 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 10 unit comes with two frequency switches They a
3. Ss a ae gt Lis o O 4 06 Figure 1 Physical Dimensions DSP 10 User Manual Page 6 of 23 DSP10 MAN A 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 Ifa 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 tim
4. e A le z las Ea y Ay BACKER ROD PIECE LOOP WIRE a la M ay ha a ha ae a a ot a Figure 8 Loop Installation The corners of the loop should be crosscut at a 45 to help prevent damage to the wire insulation during installation and temperature cycling The angled cuts should be at least 9 back from where the corner would be The saw cuts should not go any further than necessary to insure that the saw slots are at full depth where they meet Special consideration should be given to where the home run saw cut meets the loop saw cuts Here either an additional saw cut should be made as shown in Detail A or the inside of the sharp corner should be removed with a chisel as shown in Detail B DSP 10 User Manual Page 17 of 23 DSP10 MAN_A SAW CUT FOR HOME RUN EXIT CHISELED CORNER HOMIE RUN EXIT DETAIL B Figure 9 Saw Cut for Home Run Exit and Chiseled Corner for Home Run Exit Once the saw slot has been cut the slot should be cleaned of all loose material High pressure air should be directed in to the saw slot to remove all debris This will also help remove dust from the saw cutting operation from the sides of the saw slot This will allow better adhesion of the loop sealant to the saw slot The loop wire should be installed as a continuous piece of wire from the detector to the loop all of the turns in the loop and back to the detector Remember to make allowance for shrinkage in the wire
5. length when the portion of the wire not in the roadway surface is twisted The twisting is important for dealing with electrical noise A splice of the loop wire should never be made in the roadway If the loop wire needs to be spliced to another cable to get to the detector the splice should be done in a junction box and the connections should be soldered and weatherproofed Wire nuts should never be used at any point in the loop circuit In order to keep the loop wire at the bottom of the saw slot 1 to 2 pieces of backer rod should be placed in the saw slot every 1 to 2 feet The backer rod should be sized such that 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 sealant from encapsulating the loop wire The loop sealant used should be appropriate for the roadway surface that was cut Generally epoxy or polyester based sealants are used for concrete surfaces and polyester or urethane based sealants are used for asphalt surfaces However these are not hard guidelines and specific circumstances will determine which type of sealant should be used Once the loop wire leaves the saw slot it should be tw
6. User Manual Vehicle Detector DSP 10 hos Metette ete te tates DW TER 144444444 EL July 22 2014 lt Z lt m a Y O Diablo Controls Inc Copyright O 2014 Document Released Pros Who Know Trust Diablo 1 Contents FICS AS O SC O BO A O TE 3 Zi INFO CHO a aoi A O E 4 3 Tecinical Data cias 5 FUncuonal Dat dada 5 A O Se ni eS Pee ee Ae EEN Tanne ae ene een ee eer ee 5 Environmental Dita aaa 6 Mechanical Data cerne 6 Ay Features and FUNCHUON Sao EEE EE 7 Detector RESC Euni sio 7 PRESENCE DOTE caia 7 Pulse Det Ree et rr Ee Sar ea ee 7 Falo eV False CU sc 8 SENS see astiscetore cide aes aires a haa Gale barat ecsiuenic dan E Heer aeows 8 Frequency DIP S Witches o and Ola ao eibar 8 A LU eee cease tyra ga A T 9 So o Presence Bs e A O IN 9 GutputB Selection DIP SWITCHES Sand Oltra 9 SCNSILIVIEY BOOS CDIP SWIER A nerna a ra a E a 11 Eden sion DPS Wiches 2 ana S aa da proa 12 BEA do A A rn eauenate ENE A tana yeaa EEN EE an EEPE PE ETE ones 12 PICO a ores errata re entan en ase ve rN SORE ROC eR TRE PE REET EPRI TRON ER DEES Oe eee 12 5 Instala ON isidro ira 15 Detector ia a Ao 15 HOOD Instala Ona oi 16 6 Contigura ON siii teedeanseueaeouabuese 19 A acest tad at cycle tale E ON tat algal cit NU ce tas ce E eee rt ats Utd 19 Internal SORGING Soi E Si ae 19 Ts TrOUMDIESNOO UNLP ia asia 20 NO POWEer BED adios 20 Power LED Flashes On Once Every 2 Sec
7. When the detection area becomes vacant the extension timer will start and the A output will continue to be activated During this interval the LED will blink quickly at 50 milliseconds on and 50 milliseconds off If another vehicle enters the detection area during this interval the extension time is cancelled and the LED will return to the solid state Note There is no delay interval for any newly arriving vehicle if a vehicle is already in the detection area or the detector is in the extension interval Voltage A DETECTOR RESET OCCURS Detector Reset O nome Ls 2 SECONDS AFTER RESET Fail Safe See a 50ms ON and OFF Detector Reset leanne Ili 2 SECONDS AFTER RESET Fail Secure RA I No Vehicle Detection oe VEHICLE DETECTION OCCURS VEHICLE DETECTION LOST Vehicle Detection 2 SECONDS 2 Sec Delayed Detection 2 SECONDS 2 Sec Extended Iii Detection pa 50ms ON and OFF i Figure 7 Detect LED States 5 Installation Detector Installation Location The detector should be installed in a weatherproof location that is near the loop Ideally a technician should be able to see the loop and the detector at the same time Mounting The detector will function when mounted in any orientation If using a relay socket it is best to mount the detector such that the front panel will be easily accessible for configuration and troubleshooting If using a detector harness be sure to leave
8. an 100 feet use a 16 AWG wire at a minimum If the loop is installed in asphalt and there will be heavy vehicles or stopping and starting vehicles in the loop area a 14 AWG or 12 AWG should be used to provide additional strength to the loop This helps increase the life of the loop in areas where the asphalt may slowly move and or deform due to wear Loop Configuration The size and shape of the loop will determine what type of vehicles it can reliably detect There are many variables that come into play including loop dimensions percent of coverage length of lead in wire number of turns in the loop area and detection height to name just a few of them One common rule is that the useable field height of a loop is of the shortest leg of the loop So if you plan on using a 2 5 x 6 loop the expected useable detection height would be 20 The shortest leg is 2 5 or 30 30 x 2 60 60 3 20 If the installation requires the detection of motorcycles as well as vehicles the loop should go to within one foot of the curb or road way edge whichever is present If only motor vehicle detection is required within three feet of the curb or road way edge is all that is required The number of turns to use in a loop is dependent on the size of the loop the amount of metal rebar cables etc and distance from the loop to the detector Rather than dive into all of the calculations to arrive at a value we will just use safe
9. connect the loop wires for the detector The LED should begin flashing at a much slower rate second on second off If it does not change its flashing rate change the detector If a loop is connected to the correct pins of the detector disconnect the loop and using an ohmmeter check the resistance of the loop circuit If the resistance is below 2 ohms there is a short in the loop circuit The resistance will typically be 0 5 ohms to 1 5 ohms If the resistance is above 2 ohms the loop inductance should be checked This is done using an inductance meter The inductance of the loop should be more than 20 microhenries If the loop inductance is less than 20 microhenries the loop was probably not wound correctly and only has one turn in it In this case the loop must be replaced Other possibilities include a foreign object embedded in the saw clot and shorting some or all of the wires or failed wire insulation due to the wire being exposed or the wrong type of wire being used Very small loops may also have a low inductance value if sufficient turns were not added Contact technical support for help with very small loops If you do not have a meter capable of measuring resistance and inductance but do have another operating detector in the same box you can skip to this step Swap the loops between a working detector and a failing detector If the problem follows the loop the loop is the problem If it stays in the same detector replace the d
10. designed to retrofit into existing locations that may require a detector upgrade This allows maintenance personnel to carry only one detector to meet most if not all of their vehicle detection needs The detector uses an 11 pin relay socket for connections r af a E i a a a a E 7 DSP 10 User Manual Page 4 of 23 DSP10 MAN A 3 Technical Data Functional Data Sensitivity Ten sensitivities are user selectable O0 48 aL 5 08 AL L 2 1 3MNN 6 06 AL L 24 AL L 04 AL L 16 AL L 8 03 AL L 2 4 may 9 02 AL L Frequency Settings There are four frequency settings available The actual loop frequency is dependent on loop circuit inductance OFF OFF ON Medium High ON OFF Medium low _ ON ON Low B Pulse Output 250ms 15ms Response Time Response time is dependent on the sensitivity selected 0 7Oms i0ms 5 f 7Oms lOms 1 7Oms i0ms 6 140ms 20ms 70ms 10ms 140ms 20ms 70ms l0ms 8 140ms 20ms 4 7Omstl0ms 9 140ms 20ms Vehicle Hold Time In Normal Presence Mode Approximately 1 hour for a detection of 1 AL L In Extended Presence Mode Approximately 19 hours for a detection of 1 AL L 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 Three power versions 10 5 volt
11. e The DSP 10 does not have infinite presence 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 ON ON 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 DSP 10 User Manual Page 9 of 23 DSP10 MAN_A 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 10 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 amp B outputs The numbers between edges are the number of seconds in that period Vehicle Over Loop Output A Normal Output B True Pres Output B Pulse On Entry Output B Pulse On Exit Figure 2 Outpu
12. e 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 AL 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
13. ehicle to fully exit the detection area before the gate begins to close If another vehicle arrives during this extension interval the remainder of the extension time is canceled and the detector returns to the normal presence state This interval is indicated by the red Detect LED blinking fast at 50 milliseconds on followed by 50 milliseconds off repeated until the interval is complete There are four intervals to choose from No extension 2 seconds of extension 5 seconds of extension and 10 seconds of extension The choices are summarized in the table below ON ON 1Oseconds Delay DIP Switch 1 Delay is the time added after a vehicle arrives in the detection area but before the A output is activated During the delay interval the A output relay will remain de activated requiring that the vehicle stay in the detection area for a full 2 seconds before activating the A output This is useful at sites where vehicles traveling perpendicular to the gate may travel across the detection zone This interval is indicated by the red Detect LED blinking slowly at 200 milliseconds on followed by 200 milliseconds off repeatedly until the interval is complete The delay interval is fixed at 2 seconds Indicators The DSP 10 is equipped with two LED indicators Power Green and Detect Red Power LED The green power LED indicates these possible states Off The voltage applied to the detector is less than the minimum display voltage of appr
14. enough of the wiring harness to allow the technician to easily work with the detector DSP 10 User Manual Page 15 of 23 DSP10 MAN A Wiring The detector will come with a side label identifying how the detector is pinned out Wire nuts can be used for most connections to the wires in a detector wiring harness However wire nuts should never be used at any point in the loop circuit itself All loop connections should be crimped or screw terminals at a minimum and soldered for best long term reliability Special attention should be paid to insure that the loop wires remain tightly twisted together An air gap between the two wires for a loop may cause the detector to lock up if the wires are disturbed Loop Installation The reliability and overall performance of the detector are greatly dependent on the loop itself Several factors go into a good loop installation type of wire used loop configuration and installation practices Type of Wire Used The wire used for wiring the loop should have a jacket of cross linked polyethylene This would be a wire 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 th
15. etector Power LED Shows Two Quick Flashes Once Every Two Seconds This flash rate indicates that the channel has had a failure of some type but is currently working correctly Intermittent failures are usually open loop failures Any splices 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 amount can cause wire fatigue The actual failure point may be very difficult to find Often the loop must just be replaced if the issue persists but cannot be found It is possible for the intermittent failure to be a shorted loop fault One possible source of this type of fault is a foreign object being embedded in the loop saw cut and damaging the wire Another is that the loop wire has been damaged where it enters or exits a conduit or junction box or that a conduit that the loop wire is in has been damaged crushed kinked bent cut etc DSP 10 User Manual Page 21 of 23 DSP10 MAN A Detect LED Intermittently Comes On Stays On Without a Vehicle Present This type of symptom is usually caused by one of three issues physical issues with the loop electrical interference moving objects in proximity to
16. is corrected and the Fail Memory feature is enabled the LED will display the Prior Fault indication When the detector senses that a loop is experiencing a large inductance change greater than 30 the LED will turn off for 100 milliseconds then on for 100 milliseconds for 500 milliseconds then stay on for 500 milliseconds and repeat the sequence for the duration of the fault If the fault is corrected and the Fail Memory feature is enabled the LED will display the Prior Fault indication 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 or the sensitivity The LED will turn on for 1850 milliseconds off for 50 milliseconds on for 50 milliseconds off for 50 milliseconds and then repeat the sequence until power is cycled or the detector reset The LED is always on when the detector is in its normal state of operation Page 13 of 23 DSP10 MAN _A Fa 2 SECONDS 1 e Low Input 50 Voltage de DETECTOR RESET OCCURS Detector Reset s00me Fail Safe 50ms ON and OFF Detector Reset Fail Secure 2 SECONDS AFTER RESET Normal Operation Open Loop Fault anne Sea SHORTED LOOP FAILURE OCCURS Shorted Loop a Fault saben ll m LARGE CHANGE LOOP FAILURE OCCURS lt SECOND p Large Change Loop Fault Failure Memory Figure 6 Power LED States Detect LED
17. isted at least three times per foot More is better The twists should be kept tight to be most effective in reducing the effects of electrical interference DSP 10 User Manual Page 18 of 23 DSP10 MAN A 6 Configuration Wiring The wiring for each loop circuit must be kept twisted to provide the most reliable operation Wire nuts should never be used for any connection in the loop circuit The last set of characters in the model number designate the operating voltage for the detector There are three possible types LV 10 to 30 volts AC or DC Low Voltage 117 100 to 135 volts AC 230 200 to 270 volts AC There is only one wiring configuration pin out offered DSP 10 LV DSP 10 117 and DSP 10 230 4 Green ChassisGround 6 Blue Relay A N O closes for detect 7 8 Brown TA 9 Red RelayBcommon_ _ _ Internal Settings There is only one setting internal to the detector and it is the fail safe or fail secure setting There are three jumpers between the two relays All three jumpers must be set the same way or unpredictable operation of the A output will occur The printed circuit board is clearly marked with fail safe on one side and fail secure on the other The detector is shipped from the factory in the fail safe condition SFF Fail Safe a Em e Pz ee pr 5 FEE Figure 10 Fail Safe and Fail Secure Internal Jumpers DSP 10 User Manual Page 19 of 23 DSP10_MAN_A 7 Troublesh
18. loop and using an ohmmeter check the resistance of the loop circuit If the resistance is above 5 ohms there is a bad connection or the wire has been damaged The resistance will typically be 1 5 ohms or less If the resistance is 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 inductance Contact technical support for help with very large loops If you do not have a meter capable of measuring resistance and inductance but do have another operating detector in the same box you can skip to this step Swap the loops between a working detector and a failing detector If the problem follows the loop the loop is the problem If it stays in the same detector replace the detector DSP 10 User Manual Page 20 of 23 DSP10 MAN _ A Power LED Flashes Quickly 5 Hz This flash rate indicates that the channel has a shorted loop a low resistance across the loop circuit or insufficient inductance The first step is to confirm that the loop is connected to the correct pins see the wiring configuration for the pin out If the wiring is correct the next step is to confirm that the detector is working correctly Dis
19. onds still dia 20 Power LED Flashes SIOWIVICE FIZ panda 20 PowerLED Flashes Quick 21 Power LED Shows Two Quick Flashes Once Every TWO S CONGAG ssccccsseccecessececeesececeuseceeeeeseceseeecessunecessenes 21 Detect LED Intermittently Comes On Stays On Without a Vehicle Present oooonnncncccncnnnnnnnnnnnononononananininons 22 Detect LED Will Not Come On With a Vehicle Present ooccccnnccncnncccnoncccnonacononacinonccnnnarononanononannnonacnnnnccnonarononaso 23 DSP 10 User Manual Page 2 of 23 DSP10_MAN_A Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Physical DIMENSION ao a e ET 6 Outputs With NO Delay Or Extensa ida 10 O tp ts WITH DEV a dt cda 10 Output eS tata ita asia 11 Outputs with Delay and EXtensiON rad 11 Faure G POWEr LED States ondaa a a saveunisediusncertee teak 14 FISure 7 Detectan o 15 Feres FOOD IStAllat OM ui dad 17 Figure 9 Saw Cut for Home Run Exit and Chiseled Corner for Home Run EXxit cccccccssececeessceceeeseceeeeeeceeeeees 18 Figure 10 Fall Sate and Fall Secure Internal JUMPER 19 DSP 10 User Manual Page 3 of 23 DSP10_MAN_A 2 Introduction The DSP 10 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 16 bit microcontroller that does not skimp on performance The DSP 10 Detector was
20. ooting No Power LED The first step is to insure that the correct model of the detector is being used for the installation Insure that the wiring is correct and the correct voltage is being used Use a meter to measure the voltage applied to the detector For the LV version the voltage must be above 10 25V AC or DC For the 117 version the voltage must be above 100V AC For the 230 version the voltage must be above 200V AC If the correct voltage is applied and the power LED is not on replace the detector Power LED Flashes On Once Every 2 Seconds The first step is to insure that the correct model of the detector is being used for the installation Insure that the wiring is correct and the correct voltage is being used Use a meter to measure the voltage applied to the detector For the LV version the voltage must be above 10 25V AC or DC For the 117 version the voltage must be above 100V AC For the 230 version the voltage must be above 200V AC If the correct voltage is applied and the power LED is still flashing replace the detector Power LED Flashes Slowly 1 Hz This flash rate indicates that the detector has an open loop a high resistance in the loop circuit or excessive inductance The first step is to confirm that the detector has a loop connected to it and the loop is connected to the correct pins see the wiring configuration for the pin out If a loop is connected to the correct pins of the detector disconnect the
21. output will not pulse again until the loop has been reoccupied and any enabled delay has timed out DSP 10 User Manual Page 7 of 23 DSP10 MAN_A Fail Safe vs Fail Secure Here s a little note on fail safe versus fail secure operation On the DSP 10 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 10 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
22. oximately 7 75 volts The LED will be off Low Voltage The voltage applied to the detector is less than the minimum voltage for proper operation of approximately 10 25 volts The LED will blink on for 50 milliseconds once every 2 seconds Reset in Fail safe At the start of a reset event a DIP switch change sensitivity change or power cycle the LED will turn off for 500 milliseconds on for 500 milliseconds off for 500 milliseconds off for 500 milliseconds and then display its normal state Reset in Fail secure At the start of a reset event a DIP switch change sensitivity change or power cycle the LED will turn off for 500 milliseconds on for 500 DSP 10 User Manual Page 12 of 23 DSP10_MAN_A Open Loop Shorted Loop Large Change Fault Prior Fault Normal DSP 10 User Manual milliseconds blink repeatedly with 50 milliseconds on followed by 50 milliseconds off for one second and then display its normal state 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 repeatedly for the duration of the fault If the fault is corrected and the Fail Memory feature is enabled the LED will display the Prior Fault indication 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 repeatedly for the duration of the fault If the fault
23. r replace the detector DSP 10 User Manual Page 23 of 23 DSP10_MAN_A
24. re binary coded allowing up to four different DSP 10 User Manual Page 8 of 23 DSP10_MAN_A 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 Fail Memory DIP Switch 8 Normal operation is that during a loop failure the green Power LED will indicate what type of loop failure open short or large AL 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 7 Under normal conditions the DSP 10 will hold a vehicle presence for a reasonable amount of time If a vehicle parks over the loop and the detector measures a 1 AL 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 infinit
25. s to 30 volts AC or DC with over voltage protection 100 volts to 135 volts AC 200 volts to 270 volts AC Output Relay Rating 3 amps 125 volts DSP 10 User Manual Page 5 of 23 DSP10_MAN_A Current Draw 10 5 volts to 30 volts AC or DC 75 milliamps maximum 100 volts to 135 volts AC 7 5 milliamps maximum 200 volts to 270 volts AC 3 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 Mechanical Data Mounting Position Any Housing Material Lexan Housing Size 2 36 inches High x 1 75 inches Wide x 4 06 inches Deep 59 94 mm High x 44 45 mm Wide x 103 12 mm Deep 3 44 _ 1 75 A i E dl E Wy i POWER 1 DSP 10 VEHICLE DETECTOR o Frequency Select i ii DETECT gt tl High Si Med High al Med Low d Low 5 8 Off Normal On Fail Memory A la T Off Normal Presence On Extended Presence ette a te Output B Selection i 3 HIGHEST dd Th 6 Off Off On On ants 5 Of True Pres On Entry Pulse off Exit Pulse On Loop Fail 236 FREQ O A Off No Boost On Boost FREQ 1 oe Extension Fe ee 0 Secs rd 2 Secs on 5 Secs d 10 Secs Du E Off No Delay On 2 Second Delay japos O Pin i Power 2Com 3 B Relay NO 4 Grd 5 A Relay Cmn 6 4 Relay NO A T Loop Loop 986 Relay Cmn 104 Relay NC 1156 Relay NC
26. ted Another possibility is metal objects in close proximity to the loop Utility manhole covers are objects that may move slightly when vehicle tires drive over them especially if the vehicle turns while a tire in on the cover Most DSP 10 User Manual Page 22 of 23 DSP10 MAN _A manhole covers can be bolted in place Contact the owner of the manhole to see what can be done to mitigate the cover movement Detect LED Will Not Come On With a Vehicle Present The first thing to do is verify that the LED in question is still working This is accomplished by a quick lamp test Reset the detector by temporarily changing DIP switch 1 Both LEDs should turn off and turn on If the Detect LED does not illuminate replace the detector If the red LED illuminates then perhaps the sensitivity setting is too low There are many variables in determining overall sensitivity loop size number of turns loop lead in percent coverage etc In most cases a sensitivity setting of 5 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 9 and the red LED still does not come on and you have another operating detector in the same box swap the loops between a working detector and a failing detector If the problem follows the loop the loop is the problem If it stays in the same detecto
27. that are connected to a different detector are prone to cross talk when the magnetic fields from different loops interfere with each other Adjusting the loop frequency of one or both of the loops in the same area will usually allow you to find a setting that both loops will work reliably with Anything that uses electricity is a possible 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 this case If the electrical interference is occurring in the wire from the loop to the detector additional twisting should help mitigate the issue Moving Objects in Proximity to the Loop Objects that can move and are metallic or somehow electrically conductive may cause detection issues A common issue is movement of a slide gate or gate arm in close proximity to a loop The best solution would be to move the detection area further away from the moving gate We recommend that all loops should be at least 4 feet from a slide gate Try lowering the sensitivity one level so that the desired vehicles are still detected but not the moving gate NOTE Do not lower the sensitivity too much or vehicles will no longer be detec
28. the loop Physical Issues with the Loop There are many ways in which a loop installation can go bad The insulation of the loop wire can fail This can be due to the loop wire being exposed in the saw lot damage to the wire insulation during loop installation physical stressing of the wire due to movement crossing of expansion joints or asphalt that has slowly moved or deformed wires moving in the saw slot due to poor loop sealant encapsulation foreign objects embedded in the saw slot and poor electrical connections in the loop circuit The best way to check for any of these issues is to use a megohmmeter commonly referred to as a megger Disconnect the loop wires in question from the vehicle detector and any other electronic equipment Connect one lead of the megger to one end of the loop wire and the other lead to earth ground Measure the resistance For accurate measurements the ground and the loop should be wet or at least damp use a hose or a bucket of water if needed to get the area wet The reading should be at least 100 megohms If it is less than 50 megohms the insulation is compromised and the loop circuit has to be replaced Between 50 and 100 megohms the loop may or may not work properly and reliably Electrical Interference There are several possible sources of electrical interference loop cross talk power lines electric motors and insufficient twisting of the loop wires just to name a few Other loops in the area
29. ts with No Delay or Extension Vehicle Over Loop Output A 2S Delay Output B True Pres Output B Pulse On Entry Output B Pulse On Exit Figure 3 Outputs with Delay DSP 10 User Manual Page 10 of 23 DSP10 MAN_A Wehicle Over Loop Output A 25 Extend Output B True Pres Output B Pulse On Entry Output B Pulse On Exit Figure 4 Outputs with Extension Vehicle Over Loop Output A 2S Dly amp 2S Ext Output B True Pres Output B Pulse On Entry Output B Pulse On Exit Figure 5 Outputs with Delay and Extension Sensitivity Boost DIP Switch 4 The detector has a user selectable feature that increases the sensitivity of a channel after initial detection This feature is most often used to allow a detector to have a lower starting sensitivity and then increase it after a vehicle has been detected This is 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 DSP 10 User Manual Page 11 of 23 DSP10 MAN A Extension DIP Switches 2 and 3 Extension is the time added after a vehicle leaves the detection area During this interval the A output will remain activated with the intent of allowing the v
30. values You can almost never have too many turns in a loop only too few For a loop size of 2 x 6 four turns will be sufficient unless there is metal in the loop area In that case add at least one turn and two if possible As the loop size reaches 6 x 6 four turns will work for most all installations If you are unsure about your particular installation call tech support for guidance Installation Practices Permanent loops should be installed into the road surface by cutting slots into the road surface using a saw with an appropriate cutting disk for the road surface DSP 10 User Manual Page 16 of 23 DSP10_MAN_A The slot cut should be wide enough that the wire being used will easily fit into the slot This is needed so that the loop sealant used can fully encapsulate the wire When the wire fits tightly in the slot the sealant may not be able to get below the wire leaving air pockets in the saw slot If water finds its way in to these air pockets over time freeze thaw cycles can slowly jack the loop out of the saw slot 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 a F
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