Nortech PD27 Series User manual

HEAD OFFICE FACTORY
VCCE Office Park 32a Wiganthorpe Rd
170 Peter Brown Dr Willowton
Pietermaritzburg Pietermaritzburg
3201 South Africa 3201 South Africa
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
PO Box 4099
www.nortech.co.za
Willowton Hub
[email protected]
3200 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: 307UM0200_01
Date of Issue: May 2016
This document is for informaon only and unless otherwise indicated, is not to form part of any contract. In
accordance with the manufacturer’s policy of connually updating and improving design, specifications
contained herein are subject to alteraon without noce.

307UM0200_01 May 2016 PD27x User Manual Page 2 of 30
Contents
1. Introducon ................................................................................................................................................................ 4
2. Technical Data ............................................................................................................................................................ 5
2.1 Funconal data.................................................................................................................................................. 5
2.2 Electrical Data ................................................................................................................................................... 6
2.3 Environmental Data .......................................................................................................................................... 6
2.4 Mechanical Data................................................................................................................................................ 6
2.5 Approvals .......................................................................................................................................................... 7
3. Operang Procedure .................................................................................................................................................. 8
3.1 Hardware setup................................................................................................................................................. 8
3.2 DIP Switch Selecons ........................................................................................................................................ 8
3.3 Front Panel Indicators ..................................................................................................................................... 10
4. Operaon.................................................................................................................................................................. 11
4.1 Detector Tuning............................................................................................................................................... 11
4.2 Detector sensivity ......................................................................................................................................... 11
4.3 Types of Outputs ............................................................................................................................................. 12
4.4 Response mes ............................................................................................................................................... 12
4.5 Powerfail ......................................................................................................................................................... 12
4.6 Automac Frequency Selecon ...................................................................................................................... 13
5. Installaon guide ...................................................................................................................................................... 14
5.1 Product Safety Requirements ......................................................................................................................... 14
5.2 Operaonal Constraints .................................................................................................................................. 14
5.3 Loop and Feeder Material Specicaon ......................................................................................................... 15
5.4 Sensing Loop Geometry .................................................................................................................................. 16
5.5 Loop Installaon.............................................................................................................................................. 16
6. Conguraon ............................................................................................................................................................ 18
6.1 PD271 Enhanced Detector - Order number 307FT0203 ................................................................................. 18
6.2 PD272 Enhanced Detector - Order number 307FT0201 ................................................................................. 18
6.3 PD274 Enhanced Detector - Order number 307FT0202 ................................................................................. 19
6.4 PD271 Enhanced Detector DIN Rail - Order number 307FT0206.................................................................... 19
6.5 PD272 Enhanced Detector DIN Rail - Order number 307FT0207.................................................................... 20
6.6 PD274 Enhanced Detector DIN Rail - Order number 307FT0208.................................................................... 20
7. Applicaons .............................................................................................................................................................. 21
8. Customer Fault Analysis............................................................................................................................................ 22
8.1 Fault Finding.................................................................................................................................................... 22
8.2 Funconal test................................................................................................................................................. 22
APPENDIX A - FCC ADVISORY STATEMENT ....................................................................................................................... 24
APPENDIX B – INSTALLATION OUTDOORS........................................................................................................................ 25
APPENDIX C – REQUEST FOR TECHNICAL SUPPORT FORM .............................................................................................. 26

307UM0200_01 May 2016 PD27x User Manual Page 3 of 30
WARNING: 1. This unit must be grounded (earthed) !
WARNING: 2. Disconnect power before working on this unit !
WARNING: 3. Installaon and operation by service personnel only !
WARNING: 4. No user serviceable parts inside. No internal settings. Warranty
void if cover removed !
WARNING: 5. Always suspend trac through 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. Europe
Disposing of the product:
This electronic product is subject to the
EU Direcve 2002/96/EC for Waste
Electrical and Electronic Equipment
(WEEE). As such, this product must not
be disposed of at a local municipal
waste collecon point. Please refer to
local regulations for direcons on how
to dispose of this product in an
environmental friendly manner.

307UM0200_01 May 2016 PD27x User Manual Page 4 of 30
1. Introduction
The PD27x Series Dual Channel Inducve Loop Vehicle Detector is a dual channel microprocessor based detector
designed specically for parking and vehicle access control applicaons. It is suited primarily for complex mullane
access control and counng applicaons. Using the most up-to-date technology, the PD27x has been designed to meet
the requirements of a vast number of parking applicaons pertaining to operang conditions and various opons
available to the user.
The primary funcon of the detector is to detect vehicle presence by means of an inductance change caused by the
vehicle passing over a wire loop buried under the road surface.
Figure 1. The PD27x Vehicle Detector (11 Pin housing on leand DIN Rail on right)
The detector has been designed for ease of installaon and convenience, with automac frequency selection to assist
with installaon, it is easily congured 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 means of the Nortech DU100 and DU700 units.
The PD27x provides visual outputs (LED’s) on the front of the enclosure to provide an indicaon of the state of the
channels as well as the detector itself. The channel LED’s indicate whether a vehicle is present over the loop or there is
a fault on the loop while the power LED indicates that the unit has been powered, is operaonal and provides a means
of communicaon via the DU100 and DU700 units.
The unit has relay change-over contacts at the rear of the enclosure for providing outputs as congured by the front
panel DIP switches.
Although it is a dual channel detector, the design eliminates the possibility of crosstalk between the loops connected to
the detector by using sequential channel scanning.
Related Documents are listed below
Data Sheet Document No. 307DS0002
Installaon Leaet Document No. 307LF0002
2/4 Channel Vehicle Detector Installation Guide Document No. 879LF0006

307UM0200_01 May 2016 PD27x User Manual Page 5 of 30
2. Technical Data
2.1 Functional data
Tuning Fully Automac with opon to enable Automac Frequency Selecon (AFS)
Self-tuning range 20 µH to 1500 µH
Sensivity Four steps adjustable on the DIP switches (High, Medium-High, Medium-Low, Low)
Opons available are 0.01% ΔL/L, 0.02% ΔL/L, 0.05% ΔL/L and 0.10% ΔL/L
ASB (Automatic Sensivity Boost) is selectable via the DIP switches
Frequency With AFS switched on the channel tunes automatically to one of five possible frequencies
There are four selectable frequency opons with AFS switched o
Operang frequency of 18 – 110 kHz (Determined by loop geometry and frequency seng)
Output Configuraon 2 output relays
User congurable for: Presence on detect
Pulse on detect
Pulse Output Duraon 150ms
Presence Method Permanent or Limited presence
Presence Time Innite when the unit is on Permanent Presence
Dependant on level of detect and environmental condions when on Limited Presence
DriCompensaon Rate Approx. 1 %∆L/L per minute
Response Times Detect: 53.0 – 73.0ms
Undetect: 280.0 – 350.0ms
Subject to sensivity level, level of detect and speed of vehicle over the loop
Visual Indications 1 x Power / Status LED – Red
2 x Channel Status LED – Green
Reset Holding the reset buon for 3s iniates a retune
Surge protecon Loop isolaon transformer, gas discharge tubes, and Zener diode clamping on loop input.
Power Fail Innite memory retenon of detector state on power failure (provided certain criteria are
met refer to secon 4.5). This funcon can be turned on and o via the Reset push buon.

307UM0200_01 May 2016 PD27x User Manual Page 6 of 30
2.2 Electrical Data
Power requirements 120V AC ± 10% (48 to 62Hz) (PD271)
230V AC ± 10% (48 to 62Hz) (PD272)
Requirement: 1.5 VA Maximum @ 230V
12-24V ± 10% DC/AC (48 to 62Hz) (PD274)
Requirement: 1 VA Maximum @ 12 V
Relay Contact Rating Relay contact rang: 2A@30VDC, 0.5A@125VAC, 0.25A@250VAC
For ambient 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 humidity without condensaon
Circuit protecon Conformal coang over the PCB and all components
IP Rang IP30 – This product MUST be installed in an enclosure
2.4 Mechanical Data
Housing Material ABS blend
Mounng Posion DIN rail mounng and Shelf
Connecons 11-pin Submagnal (JEDEC No. B11-88) OR
2x 6 way Plugs on DIN Rail Mount

307UM0200_01 May 2016 PD27x User Manual Page 7 of 30
The gure below shows the 11 pin connector on the rear of the PDx7x unit, as well as the DIN Rail clip for the DIN Rail
housing version. The 11 pin connector plugs into a relay base that accommodates all of the wiring for the unit. A list of
acceptable relay bases is given below. The DIN Rail housing plugs directly onto the DIN Rail and is 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 base recommendaons:
Size of Housing 78mm ( High ) X 41mm ( Wide ) X 80mm ( Deep )
2.5 Approvals
CE Regulations: EN 301 489-3 Equipment Type: III Class of Equipment: 2
CISPR22
EN 50293 Performance Criteria B
Safety: IEC / EN 60950-1
Manufacturer Part Number
Finder 90.23
Bremas Ersce ES 12
TE connecvity (Schrack) MT78740
Schneider Electric RUZC3M
Ormron PF113A-D
Allen Bradley 700-HN101

307UM0200_01 May 2016 PD27x User Manual Page 8 of 30
3. Operating Procedure
3.1 Hardware setup
The PD27x Series dual channel parking detector is designed to be DIN rail mounted, with the controls and visual
indicators at the front, and wiring at the rear of the enclosure. The power, loop and relay outputs are connected to the
11 pin relay base at back of the housing.
3.2 DIP Switch Selections
3.2.1 Presence (switch 10)
The presence seng determines how the detector tracks a detect. There are two
modes, permanent presence and limited presence.
Permanent presence mode is aimed at maintaining the presence of a vehicle over
the loop by connuously compensating for all environmental changes. This is used
in situaons where safety is involved and the detector is required to maintain the
detect unl the vehicle leaves the loop.
Limited presence is aimed at liming the presence of a vehicle over the loop. This
is used in situaons where stascs or control is involved and a vehicle parked over
the loop should not prevent connued operaon. The presence time is related to
the size of the detect. Typically a 1% ∆L/L will timeout aer approximately 1 hour.
3.2.2 Pulse on detect / Presence on detect (switch 9 and 8)
When a vehicle enters the loop the relay can either give a 150ms pulse on detect,
or give an output for the entire me that the vehicle is detected by the detector.
This seng can be made for each channel respectively as indicated on the
faceplate.
3.2.3 Fail-safe or Fail-secure (switch 7 and 6)
The relay output polarity of the presence relay can be switched between fail-safe
and fail-secure via the DIP switches.
In fail-safe, the output is the same in detect as it 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 failure/ fault will provide a signal.
In fail-secure, the output is the same in un-detect as it is with no power applied to the unit. Related to an access control
situaon, this is used in situations where the loss of power must not allow free entry. Only a valid detect situaon will
provide a signal.
3.2.4 AB Logic (switch 5)
AB logic can be used to count the cars going in a specified direcon. A transion from loop 1 to loop 2 (classified as
forwards) results in a 150ms pulse output on Relay 1. A transion from loop 2 to loop 1 (classied as backwards) results
in a 150ms pulse output on Relay 2. This funcon can easily be switched off by making use of the DIP switches as
indicated on the tables.
3.2.5 Automatic Sensitivity Boost (ASB) (switch 4)
ASB is a mode which alters the un-detect level of the detector, and can be toggled on or o via the DIP switches. ASB
causes the sensivity level to be boosted to a maximum on detecon of a vehicle, irrespecve of current sensivity level
and maintained at this level during the enre presence of the vehicle over the loop. When the vehicle leaves the loop
and the detecon is lost, the sensitivity level reverts to the pre-selected level. This is typically used for vehicles with high
beds, or vehicles towing trailers, where it is important to not lose the detect over the entire length of the vehicle.
3.2.6 Automatic Frequency Selection (AFS) (switch 3)
This seng allows the detector to briey evaluate all ve frequency bands and select the best operang frequency
available. The tuning time with AFS switched on can range between 5 to 20 seconds. With AFS switched off, the
frequency can be selected manually.
Figure 3. PD27x Faceplate

307UM0200_01 May 2016 PD27x User Manual Page 9 of 30
3.2.7 Frequency (switch 2 and 1)
The frequency switches are used to shift the operang frequency of the detector. This is primarily used to handle
situaons in which more than one detector is used at the same site. The detectors must be set-up to ensure no crosstalk
(interference) occurs between adjacent loops connected to different detectors. This is achieved by ensuring that the
loops of the two detectors are spaced sufficiently apart (approximately 2 metres between adjacent edges) and also
ensuring that the detectors are set to different frequencies.
The loops connected to multichannel detectors are not suscepble to crosstalk due to the design of the loop interface.
Sw2 Sw1 Frequency
Right Right High Frequency
LeRight Medium High Frequency
Right LeMedium Low Frequency
LeLeLow Frequency
3.2.8 Sensitivity (switches 1 to 4)
The sensivity of the detector determines the change of inductance necessary to produce a detect. The PD27x provides
a selectable range of four sensivity sengs. Sensitivity is defined as a change in the inductance, with the PD27x it
ranges 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 Sensitivity
LeLe(0.10%) - Low Sensivity
Sw2 Sw1 Sensivity Channel 2
Right Right (0.01%) - High Sensitivity
LeRight (0.02%) - Medium High Sensitivity
Right Le(0.05%) - Medium Low Sensitivity
LeLe(0.10%) - Low Sensivity
3.2.9 Push button (Retune and Powerfail)
The push button can be used to iniate a retune or to switch Powerfail on or o depending on how long the push buon
is held in.
Switch Descripon Hold Funcon
Push
button
Reset 3 sec This would iniate a detector retune
Power fail
status 10 sec
Hold for 10s to determine the state of Powerfail. If the LEDs
are ON, Powerfail is ON. If the LEDs are OFF, Powerfail is
OFF.
Power fail
toggle 30 sec
Holding for 30s will toggle the Powerfail status. The state of
Powerfail is known after holding for 10s. Aer 30s, if the
LEDs turn OFF, Powerfail is now OFF. If aer 30s the LEDs
turn ON, Powerfail is now ON.
The PD27x has a Powerfail funcon which is designed to retain the memory of a vehicle on the loop in the event of a
power fail situaon. This is designed specically for fail safe situaons to retain the output state and prevent a glitch
on the outputs in the event of a power failure.

307UM0200_01 May 2016 PD27x User Manual Page 10 of 30
3.3 Front Panel Indicators
The front panel indicators consist of a Red Power / Communicaon LED and one Green Channel LED.
There are four possible conditions which are indicated by the LED’s.
•Idle condion – no vehicle is detected
•Detect condion – a vehicle is detected passing over the inducve loop
•Tuning condion – the detector is currently tuning to the loop
•Fault condion – the detector is unable to tune to the loop as it is either out of operaonal condions such
as low signal strength or frequency out of range, or there exists a fault on the loop such as a short circuit
or an open circuit.
If a loop fault exists, the Green Channel LED will come on and ash at a rate of 2Hz indicang that the unit is trying to
tune. If the fault is self-healing, the detector will 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 historical fault informaon.
In the event of a vehicle passing over the inducve loop and causing a detect, the Green Channel LED will light up
indicang the presence of a vehicle and remain on for the duraon of the detect.
It should be noted that the Channel LED does NOT necessarily represent the output state of the relays. It only represents
the detecon of a vehicle over the loop. The relay state could, for example, be different from the LED state in the case
of a pulse output aer its pulse duraon or a fault output. The only me the Channel LED will go off while a vehicle is
sll present is if the channel is in limited presence mode and has expired.
The Red Power LED indicates that the unit is powered and funconal. The red LED is also used as a communicaon
interface with the DU100 / DU700 to obtain diagnoscs.