USER MANUAL ULD 920
Contents
1. 2 CHANNEL 2 N O CHANNEL 2 COMMON e Ne oe co ro 2 EARTH CHANNEL 1 N O 1 6 CHANNEL 1 COMMON LOOP INSTALLATIONS CABLE SPECIFICATION LOOP FEEDER 1 5mm cross sectional area multi strand cable Insulation material PVC or Silicone Current Rating 15A FEEDER FOR LONG RUNS Foil screened cable recommended Earth at equipment end only Waterproof cable junction box Pratley or similar will be required Loop feeder cables should always be twisted from the point of exiting the loop to the termination of cables on the equipment Minimum of 20 twists per metre should be used LOOP GEOMETRY 1 metre 1 metre NOTE That with two adjacent loops connected to a dual channel detector it is possible for these loops to share a common slot if so required As the channels are multi plexed no crosstalk interference will occur NOTE Avoid large loops sensitivity will be affected SLOT DEPTH id 30 50mm Dependent on number of turns of Loop cable Sealant NOTE Clean amp dry slots prior to inserting cable DETERMINING NUMBER OF TURNS OF CABLE PERIMETER NO OF TURNS 3 6M 4 6 10M 3 10 30 M 2 NOTE Add 2 additional turns to compensate for the effects of sub surface re inforcing on sensitivity DETECTOR DIRECTION LOGIC OPERATION PULSE MODE 3 feet max 1M lt gt No output No output Pulse ou2. ctance or to ignore certain vehicle types if so required Typical inductance changes on a 2m x 1m 3 turns loop VEHICLE AL L BICYCLE 0 02 MOTORCYCLE 0 12 ARTICULATED TRUCK 0 4 SEDAN CAR gt 1 0 AUTOMATIC SENSITIVITY BOOST ASB SWITCH 7 When ASB is selected ON the level of sensitivity is increased to HIGH after detection has occurred This ensures that Detection does not drop away under high bed vehicles PRESENCE PRES SWITCH 8 ON PERMANENT PRESENCE OFF LIMITED PRESENCE 1 hr for 3 AL L INTERNAL LINKS AB LOGIC No AB Logic AB Presence AB Pulse PULSE PRESENCE PP 1 channel 1 PP 2 channel 2 Presence Pulse INDICATIONS GREEN LED POWER ON RED LED CHANNEL OUTPUT After initial power up or after a re tune the detector automatically tunes to the inductive loop After 0 2 seconds the RED LED will flash out the frequency of operation 50 kHz 5 flashes If a fault condition exists on the loop open circuit short circuit the RED LED will FLASH at a fast rate If a re tune occurs the RED LED will FLASH but at a slower rate RESET PUSH BUTTON The Detector must be RESET whenever switch settings are altered Only a reset will clear the above fault indication conditions providing the loop fault has been cleared PINOUTS DESCRIPTION LIVE DC NEUTRAL OV LOOP CHANNEL 1 LOOP CHANNEL 1 LOOP CHANNEL 2 LOOP CHANNEL
3. iU Dual Channel Vehicle Detector ULD 920 USER MANUAL Part Number MIC0302036 ULD 920 SENSA BLE SENSORS Revision 03 INDEX PAGE Detector Commissioning iii 1 Frequency sta g ER 1 Sens sa 1 Automatic Sensitivity Boost ASB us 2 PIesence s de era de at due Cat 2 Internal LinkS ui eee dt inu Ld dti p 2 INGICAIONS pr PEE 3 Reset Push B tton erp pe mete dent Eae Pd quet est de ce da ped d Ped due de et acne 3 giis 4 Loop installations 2 iioi diete a a 5 Gable Specificatl N gi diete al teet d eae da dg Utd e dove deer Pe reget eda 5 Loop Geometry si ii ves a ve aed t eee tet hi qe teet itd ence 5 5 i oet ant e e eue diat 5 Determining Number of Turns of Cable sse 5 Detector Direction Logic Operation nennen nnns nnns 6 Technical Specifications a n avian Gath hel enti eee tle te sti eene tite Pee dius 8 DETECTOR COMMISSIONING Sens BLE o 4 B a2 J FREQ I sens1 1 sens2 ASB PRES D RESET MEDIUM HIGH MEDIUM LOW Frequency setting is provided to eliminate crosstalk interface between adjacent detectors Crosstalk is indicated by random outputs chattering relays and possible detector lock up SENSITIVITY Channel 1 switches 3 amp 4 Channel 2 switches 5 amp 6 MEDIUM LOW 0 5 HIGH 0 1 MEDIUM HIGH 0 02 LOW 0 5 Sensitivity settings have been optimised to reliability produce an output at the required change on indu
4. tput i A gt B CH1 a B gt A CH2 PRESENCE MODE 3 feet max 1M No output Presence output begins A gt B CH1 B gt A CH2 0 TD c o 3 Q 2 o oD O c o 9 oD ULD 920 TECHNICAL SPECIFICATIONS Tuning Inductive Range Sensitivity Sensitivity Boost Frequency Response Time Output Configuration Direction Logic Presence Time Pulse Output Duration Indications Reset push buttons Protection Automatic 20 1500uH Four steps adjustable Maximum 0 02 AL L Minimum 0 5 AL L Selectable on Med High Med Low Low Four steps adjustable Range 20 140kHz App 100ms Turn on Turn off Selectable on PCB 2 Output relays Relay 1 Presence Pulse AB Relay 2 Presence Pulse BA Selectable Presence Pulse Selectable Permanent or Limited 1hr for 3 AL L 150ms 250 ms factory option 3 LEDs Green Power Red Output per channel Flush mount on front panel Loop Isolation Transformer zener diode GDT Power Relays MOV Power Relay Rating Temperature range Storage Temperature Humidity Dimensions 76mm ULD 921 230V AC 15 ULD 922 115V AC 15 ULD 923 12 24V AC DC 15 5A 230V AC 40 C to 80 C 40 C to 85 C Up to 95 RH 75mm x 40mm 76mm HxWxD 75mm
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