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 specifically 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 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 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 configured 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 Leaflet
Document No. 307LF0002
2/4 Channel Vehicle Detector Installation Guide
Document No. 879LF0006
