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307UM0200_01 May 2016

PD27x User Manual

Page 13 of 30

The level of the detect must be sufficiently greater (at least 0.8%) than the sensi

vity level or else the maximum

poten

al temperature dri

from one time of day when the power fails to another when the power returns mustn’t

exceed 20°C.

The level of the detect should be no less than 0.15% and a minimum of 0.8% above the sensitivity level.

With AFS ac

vated, none of the channels must be in fault since this will cause the unit to retune on recovery.

If the presence of a vehicle should occur less than a second before power is lost, there is a chance that the unit won’t
retain the detect and the outputs could toggle on restoration of power.

If these condi

ons are not met, it is possible for the detect condi

on to be lost on recovery of power.

Powerfail cannot be guaranteed to work if a user interferes with the detector in any way when the power
is OFF. No se

ngs are allowed to be changed. The enclosure housing the detector shall NOT be opened

when the unit is OFF and Powerfail is turned on, as any drastic change in temperature could result in
Powerfail starting up in the incorrect state. Nortech accepts no responsibility or liability in the event of
incorrect behaviour caused by user interference.

4.6 Automatic Frequency Selection

AFS allows the detector to briefly evaluate all five frequency bands and select the best opera

ng frequency available. It

weighs up each selec

on based on where the frequency is located within the opera

onal range, the signal strength, and

the level of detected noise. AFS allows the detector to evaluate all the frequency selec

ons.

Due to the increased processing required, AFS takes longer to tune than when it is deac

vated. The tune

me with AFS

on can range from 5 to 20 seconds. If a

er this period of time, the detector s

ll has not tuned, it is also possible that

none of the frequency selections are suitable for the loop. If this occurs, manual frequency selec

on should be used.

Due to the sporadic nature of noise, the channel may seem quiet during the evalua

on but s

ll suffer from cross-talk.

AFS can be toggled on or off via the DIP switch. While the detector is tuning, it is recommended to allow the AFS tuning
to complete.

On both manual and automatic frequency selec

on, once a valid frequency offset has been selected, the detector waits

for that se

ng to se

le below the sensitivity set

ng before allowing normal opera

on to con

nue. If there is sufficient

dri

from an extreme temperature change in the installa

on loca

on or vehicles driving over the loop at the

me, it is

possible that the tuning will timeout, invalidate that frequency selec

on and a

empt to tune again. If the situa

on is

very close to the limit, it is possible that it might tune as the dri

or noise goes back over the threshold and the unit

goes into detect just as it tunes. In a noisy environment, this can be prevented by retuning and if the situation persists
to decrease the channel sensi

vity.

Содержание 307FT0201

Страница 1: ...00 South Africa Nortech International Pty Ltd Reg No 1998 010951 07 PD27x Dual Channel Parking Detector User Manual NORTECH INTERNATIONAL PTY LTD All rights reserved Copyright 2016 Document Number 307...

Страница 2: ...nts 14 5 2 Opera onal Constraints 14 5 3 Loop and Feeder Material Specifica on 15 5 4 Sensing Loop Geometry 16 5 5 Loop Installa on 16 6 Configura on 18 6 1 PD271 Enhanced Detector Order number 307FT0...

Страница 3: ...the barrier area during installa on and testing that may result in unexpected operation of the barrier WARNING 6 USA FCC Advisory Statement Refer to Appendix A at the end of this document WARNING 7 Eu...

Страница 4: ...is easily configured to suit various applica ons By making use of the DIP switches and push bu on the PD27x can be easily set up for the users applica on needs The unit also provides diagnos cs by me...

Страница 5: ...ut relays User configurable for Presence on detect Pulse on detect Pulse Output Dura on 150ms Presence Method Permanent or Limited presence Presence Time Infinite when the unit is on Permanent Presenc...

Страница 6: ...bient temperatures above 60 C De rate the relay Maximum current as per graph below 2 3 Environmental Data Storage Temperature 40 C to 80 C Opera ng Temperature 40 C to 80 Humidity Up to 95 relative hu...

Страница 7: ...onto the DIN Rail and is fi ed with 2x 6 way connectors for wiring the necessary connec ons Figure 2 PDx7x rear view showing the 11 pin connector on the le and the DIN Rail housing on the right Relay...

Страница 8: ...t is with no power applied to the unit Related to an access control situa on this is used in situa ons where the loss of power must not lock people out Either a valid detect situation or a power failu...

Страница 9: ...ges from 0 01 to 0 1 with 0 01 being the highest sensi vity selec on Sw4 Sw3 Sensi vity Channel 1 Right Right 0 01 High Sensitivity Le Right 0 02 Medium High Sensitivity Right Le 0 05 Medium Low Sensi...

Страница 10: ...ll con nue to operate but the LED will flash at a slower rate of 1Hz indica ng to the user that a fault has occurred The detector must be power cycled or reset via the pushbu on in order to clear the...

Страница 11: ...A detect of greater than 16 L L occurs A fault has occurred and is self healing The detector will automatically tune the channel to its connected loop The detector will tune to any loop with an induct...

Страница 12: ...es The response time of the detector is the time taken from when a vehicle moves over the loop to when the detector gives an output The response mes of the PD27x have been adjusted to prevent false op...

Страница 13: ...ra ng frequency available It weighs up each selec on based on where the frequency is located within the opera onal range the signal strength and the level of detected noise AFS allows the detector to...

Страница 14: ...c Circuit Breaker for AC models and a fuse for DC models v WARNING This product must be installed in an enclosure as the IP ra ng of the detector is IP 30 vi WARNING No user serviceable parts inside N...

Страница 15: ...ot depth should be kept as shallow as possible taking care that no part of the loop or the feeder remains exposed after the sealing compound has been applied 5 3 Loop and Feeder Material Speci ication...

Страница 16: ...od prac ce at me of installation to construct adjacent loops with alternate three and four turn windings For addi onal Informa on on loop geometry refer to the following documents INDUCTIVE LOOP VEHIC...

Страница 17: ...17 of 30 300 mm 300 mm 2 m depending on road width 1 m 1 m Min Distance Apart 2 m Road width 2 m 3 m Road width 4 m Max Distance Apart No Limit Figure 6 Adjacent loops connected to different detector...

Страница 18: ...number 307FT0203 302FT0041 Wiring Harness Wire COLOUR 11 PIN Connector Pin No FUNCTION Red 1 Live Power supply 120V AC 10 50 60Hz Black 2 Neutral Blue 3 Channel 1 Loop Twist this pair Blue 4 Channel 1...

Страница 19: ...y Green Yellow 9 Earth White 10 Channel 1 Relay White 11 Channel 1 Relay Figure 8 Example of PD27x Side Labels Power supply requirements and pin connec ons are clearly stated on the side of the unit 1...

Страница 20: ...ot Connected Bo om 7 Channel 2 Relay 8 Channel 2 Relay 9 Channel 1 Relay 10 Channel 1 Relay 11 Power supply 230V AC 10 50Hz 12 6 6 PD274 Enhanced Detector DIN Rail Order number 307FT0208 DIN Rail conn...

Страница 21: ...ispensers As a barrier gate door closing detector As a barrier gate door opening detector Free exit To generate pulses for vehicle coun ng As a logic unit to determine the direc on of traffic flow Som...

Страница 22: ...detector b Faulty loop or feeder connec on a Change frequency se ng b Check that the feeders are correctly connected and adequately twisted When a Vehicle crosses the loop there is no detect a Loop wi...

Страница 23: ...l will operate Output relays set to PULSE will operate momentarily approximately 150ms dura on To check the sensitivity presence me etc use should be made a calibrated tester which compromises of a ca...

Страница 24: ...uipment does cause harmful interference to radio or television recep on which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or...

Страница 25: ...n degree 2 Appendix B 2 IEC 60950 22 2005 Northern Europe To achieve outdoor opera on down to 50 C as required by IEC 60950 22 2005 for Northern Europe Finland Norway and Sweden a heater with a thermo...

Страница 26: ...____________ Telephone No _______________________ Mobile Cellphone No _________________ FAX No ____________________________ Postal address ____________________________________ ________________________...

Страница 27: ...m Size of loop ____ m by ____ m Shape of loop _____________________ Shape of loop _____________________ Number of Turns _____ Number of Turns _____ Size of wire used mm2 or AWG _____________ Size of w...

Страница 28: ...______ mm Thickness of insulation ____________ mm Type of feeder cable used screened armoured multicore etc ____________________________________________________________________________________ _______...

Страница 29: ...__________ V wires and earth __________ V DC resistance of Feeder plus Loop _______ ohms DC resistance of Feeder plus Loop _______ ohms Inductance of Feeder plus Loop ________ H Inductance of Feeder p...

Страница 30: ...circuit Short circuit or Indeterminate Undetect Detect Open circuit Short circuit or Indeterminate Inductance Change for each vehicle type Use the maximum sensitivity reading and reset the statis cs...

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