Nortech PD17x, PD27, PD271, PD274, PD272 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

[e-mail]

3200 South Africa

Nortech International (Pty) Ltd.

Reg. No. 1998/010951/07

PD17x

Single Channel parking Detector

User Manual

NORTECH INTERNATIONAL (PTY) LTD
All rights reserved
Copyright © 2016
Document Number: 307UM0100_01
Date of Issue: May 2016

This document is for information only and unless otherwise indicated, is not to form part of any contract. In

accordance with the manufacturer’s policy of continually updating and improving design, specifications

contained herein are subject to alteration without notice.

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Contents

1. Introduction ................................................................................................................................................................ 4

2. Technical Data ............................................................................................................................................................ 5

2.1 Functional data .................................................................................................................................................. 5

2.2 Electrical Data ................................................................................................................................................... 6

2.3 Environmental Data .......................................................................................................................................... 6

2.4 Mechanical Data ................................................................................................................................................ 6

2.5 Approvals .......................................................................................................................................................... 7

3. Operating Procedure .................................................................................................................................................. 8

3.1 Hardware setup ................................................................................................................................................. 8

3.2 DIP Switch Selections ........................................................................................................................................ 8

3.3 Front Panel Indicators ....................................................................................................................................... 9

4. Operation .................................................................................................................................................................. 11

4.1 Detector Tuning............................................................................................................................................... 11

4.2 Detector sensitivity ......................................................................................................................................... 11

4.3 Types of Outputs ............................................................................................................................................. 12

4.4 Response times ............................................................................................................................................... 12

4.5 Powerfail ......................................................................................................................................................... 13

4.6 Automatic Frequency Selection ...................................................................................................................... 13

5. Installation guide ...................................................................................................................................................... 14

5.1 Product Safety Requirements ......................................................................................................................... 14

5.2 Operational Constraints .................................................................................................................................. 14

5.3 Loop and Feeder Material Specification ......................................................................................................... 15

5.4 Sensing Loop Geometry .................................................................................................................................. 16

5.5 Loop Installation .............................................................................................................................................. 16

6. Configuration ............................................................................................................................................................ 18

6.1 PD171 Enhanced Detector - Order number 307FT0103 ................................................................................. 18

6.2 PD172 Enhanced Detector - Order number 307FT0101 ................................................................................. 18

6.3 PD174 Enhanced Detector - Order number 307FT0102 ................................................................................. 19

6.4 PD171 Enhanced Detector DIN Rail - Order number 307FT0104 .................................................................... 19

6.5 PD172 Enhanced Detector DIN Rail - Order number 307FT0105 .................................................................... 20

6.6 PD174 Enhanced Detector DIN Rail - Order number 307FT0106 .................................................................... 20

7. Applications .............................................................................................................................................................. 22

8. Customer Fault Analysis............................................................................................................................................ 23

8.1 Fault Finding .................................................................................................................................................... 23

8.2 Functional test ................................................................................................................................................. 24

APPENDIX A - FCC ADVISORY STATEMENT ....................................................................................................................... 25

APPENDIX B – INSTALLATION OUTDOORS ........................................................................................................................ 26

APPENDIX C – REQUEST FOR TECHNICAL SUPPORT FORM .............................................................................................. 27

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WARNING: 1. This unit must be grounded (earthed) !

WARNING: 2. Disconnect power before working on this unit!

WARNING: 3. Installation 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 traffic through the barrier area during

installation 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 Directive 2002/96/EC for
Waste Electrical and Electronic
Equipment (WEEE). As such, this
product must not be disposed of at a
local municipal waste collection point.
Please refer to local regulations for
directions on how to dispose of this
product in an environmental friendly
manner.

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1. Introduction

The PD17x Series Single Channel Inductive Loop Vehicle Detector is a single channel microprocessor based detector,
designed specifically for parking and vehicle access control applications. It is suited primarily for access control
applications. Using the most up-to-date technology, the PD17x has been designed to meet the requirements of a vast
number of parking applications pertaining to operating conditions and various options available to the user.

The primary function 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 PD17x Vehicle Detector (11 Pin housing on left and DIN Rail on right)

The detector has been designed for ease of installation and convenience, with automatic frequency selection to assist
with installation, as well as customisable outputs and operating modes, the product is easily configurable to suit various
applications. The unit provides diagnostic information by means of the Nortech DU100 and DU700 units.

The PD17x provides visual outputs (LED’s) on the front of the enclosure to provide an indication of the state of the
channel, as well as the detector itself. The channel LEDs indicate whether a vehicle is present over the loop or if there
is a fault on the loop. The power LED indicates that the unit is active and is also used to provide a means of
communication with the DU100 and DU700 units.

The unit has relay change-over contacts on the connector block, at the rear of the enclosure, for providing outputs as
configured by the front panel DIP switches.

Related Documents are listed below

Data Sheet Document No. 307DS0002
Installation Leaflet Document No. 307LF0002
2/4 Channel Vehicle Detector Installation Guide Document No. 879LF0006

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2. Technical Data

2.1 Functional data

Tuning Fully Automatic with the option to enable Automatic Frequency Selection (AFS)

Self-tuning range 20 µH to 1500 µH

Sensitivity Four step adjustable on the DIP switches (High, Medium-High, Medium-Low, Low)

Options available are 0.01% ΔL/L, 0.02% ΔL/L, 0.05% ΔL/L and 0.10% ΔL/L

ASB (Automatic Sensitivity 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 options with AFS switched off

Operating frequency of 18 – 110 kHz (Determined by loop geometry and frequency setting)

Output Configuration 2 output relays

Relay 1 operates as a presence relay, activating on detect

Relay 2 operates as a pulse relay, activating on an event as specified by the switches

Pulse Output Duration User selectable to either 150ms or 250ms

Presence Method Permanent or Limited presence

Presence Time Infinite when the unit is on Permanent Presence

Dependant on level of detect and environmental conditions when on Limited Presence

Drift Compensation Rate Approx. 1 %L/L per minute

Response Times Detect: 53.0 – 73.0ms

Undetect: 280.0 – 350.0ms

Subject to sensitivity level, level of detect and speed of vehicle over the loop

Visual Indications 1 x Power / Status LED – Red

1 x Channel Status LED – Green

Reset Holding the reset button for 3s initiates a retune

Surge protection Loop isolation transformer, gas discharge tubes and Zener diode clamping on loop input

Power Fail Infinite memory retention of detector state on power failure (provided certain criteria are

met refer to section 4.5). This function can be turned on and off via the Reset push button.

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2.2 Electrical Data

Power requirements 120V AC ± 10% (48 to 62Hz) (PD171)

230V AC ± 10% (48 to 62Hz) (PD172)

Requirement: 1.5 VA Maximum @ 230 V

12-24V ± 10% DC/AC (48 to 62Hz) (PD174)

Requirement: 1 VA Maximum @ 12 V

Relay Contact Rating Relay contact rating: 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

Operating Temperature -40°C to +80°C

Humidity Up to 95% relative humidity without condensation

Circuit protection Conformal coating over the PCB and all components

IP Rating IP30 – This product MUST be installed in an enclosure

2.4 Mechanical Data

Housing Material ABS blend

Mounting Position DIN rail mounting or Shelf

Connections 11-pin Submagnal (JEDEC No. B11-88) OR

2x 6 way Plugs on DIN Rail Mount

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The figure 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 fitted with 2x 6 way
connectors for wiring the necessary connections.

Figure 2. PDx7x rear view showing the 11 pin connector on the left and the DIN Rail housing on the right

Relay base recommendations:

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 connectivity (Schrack)

MT78740

Schneider Electric

RUZC3M

Ormron

PF113A-D

Allen Bradley

700-HN101

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3. Operating Procedure

3.1 Hardware setup

The PD17x Series single 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 Time (switch 10)

The presence setting determines how the detector will track 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 continuously compensating for all environmental changes. This is used
in situations where safety is involved and the detector is required to maintain the
detect until the vehicle leaves the loop.

Limited presence is aimed at limiting the presence of a vehicle over the loop. This is
used in situations where statistics or control is involved and a vehicle parked over
the loop should not prevent continued operation. The presence time is related to
the size of the detect. Typically a 1% ∆L/L will timeout after approximately 1 hour.

3.2.2 Pulse on Detect or Un-detect (switch 9)

The user can select the detector to pulse on detect, as a vehicle enters the loop or
pulse on un-detect, as the vehicle exits the loop.

3.2.3 Pulse Width (switch 8)

The pulse width of the relay can be selected to be either 150ms or 250ms.

3.2.4 Automatic Frequency Selection (AFS) (switch 7)

This setting allows the detector to briefly evaluate all five frequency bands and
select the best operating 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.

3.2.5 Fail-safe or Fail-secure (switch 6)

The relay output operation 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
situation, this is used 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
situation, this is used where the loss of power must not allow free entry. Only a valid detect situation will provide a
signal.

3.2.6 Automatic Sensitivity Boost (ASB) (switch 5)

ASB is a mode which alters the un-detect level of the detector, and can be toggled on or off via the DIP switches. ASB
causes the sensitivity level to be boosted to a maximum on detection of a vehicle, irrespective of the current sensitivity
level, and maintained at this level during the entire presence of the vehicle over the loop. When the vehicle leaves the
loop and the detection 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.

Figure 3. PD17x Faceplate

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3.2.7 Sensitivity (switch 4 and 3)

The sensitivity of the detector determines the change of inductance necessary to produce a detect. The PD17x provides
a selectable range of four sensitivity settings. Sensitivity is defined as a change in the inductance, with the PD17x it
ranges from 0.01% to 0.1%, with 0.01% being the highest sensitivity selection.

3.2.8 Frequency (switch 2 and 1)

The frequency switches are used to shift the operating frequency of the detector. This is primarily used to handle
situations 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.

Sw2

Sw1

Frequency

Right

Right

High Frequency

Left

Right

Medium High Frequency

Right

Left

Medium Low Frequency

Left

Left

Low Frequency

3.2.9 Push button (Retune and Powerfail)

The push button can be used to initiate a retune or to switch Powerfail on or off depending on how long the push button
is held in.

Switch

Description

Hold

Function

Push
button

Reset

3 sec

This would initiate 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. After 30s, if the
LEDs turn OFF, Powerfail is now OFF. If after 30s the LEDs
turn ON, Powerfail is now ON.

The PD17x has a Powerfail function which has been designed to retain the memory of a vehicle on the loop in the event
of a power fail situation. This is designed specifically for fail safe situations to retain the output state and prevent a glitch
on the outputs, in the event of a power failure.

3.3 Front Panel Indicators

The front panel indicators consist of a Red Power / Communication LED and one Green Channel LED.

There are four possible conditions which are indicated by the LED’s.

 Idle condition – no vehicle is detected
 Detect condition – a vehicle is detected passing over the inductive loop
 Tuning condition – the detector is currently tuning to the loop
 Fault condition – the detector is unable to tune to the loop as it is either out of operational conditions, 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 flash at a rate of 2Hz indicating that the unit is trying to
tune. If the fault is self-healing the detector will continue to operate but the LED will flash at a slower rate of 1Hz

Sw4

Sw3

Sensitivity

Right

Right

(0.01%) - High Sensitivity

Left

Right

(0.02%) - Medium High Sensitivity

Right

Left

(0.05%) - Medium Low Sensitivity

Left

Left

(0.10%) - Low Sensitivity

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indicating to the user that a fault has occurred. The detector must be power cycled or reset via the pushbutton in order
to clear the historical fault information.

In the event of a vehicle passing over the inductive loop, causing a detect, the Green Channel LED will light up indicating
the presence of a vehicle and remain on for the duration of the detect.

It should be noted, however, that the Channel LED does NOT necessarily represent the output state of the relays. It only
represents the detection 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 after its pulse duration or a fault output. The only time the Channel LED will go off, while a
vehicle is still present, is if the channel is in limited presence mode and has expired.

The Red Power LED indicates that the unit is powered and functional. The red LED is also used as a communication
interface with the DU100 and DU700 to obtain diagnostics.