220V PD-132 Inductive Vehicle Single Loop Detector for Automatic
Gate opener and barrier gate
The detector must be installed in a convenient weatherproof
location as close to the loop as possible. Installation location
must choose to stay away from the heat source, it around other
devices must maintain a distance of at least 10mm (mustn’t fix
cling to the cabinet). A correct loop configuration and detector
installation will ensure a successful inductive loop detection
system. Loop of several important parameters include: loop figure,
size, and turns, install methods (details as “Loop installation
Supply voltage: 230V AC , 115V AC, 24V DC/AC, 12V DC/AC ( See the
label on the detector)
Voltage tolerance AC: +10% / -15%
Voltage tolerance DC: ±15%
Power Consumption: 4.5VA
Output relays: 240V/5A
Operating temperature: -20°C to +65°C
Storage temperature: -40°C to +85°C
Frequency range: 20 kHz to 170 kHz
Reaction time: 10ms
Signal holding time: Unlimited / limited when loop is permanently
covered 10 minutes
Sensitivity: Adjustable in 4 increments
Loop inductance: Total loop plus connection wiring: 50μH to 1000μH.
Ideal is 100μH to 300μH
Loop connection wiring: Maximum length 20 meters, twisted at least
20 times per meter
Size of Housing: 78x40x108 mm (L x W x H) Wiring Diagram
Operation and Indication
While the detector is tuning, the green Channel LED and red Power
LED will be turn on. It remain about 2 seconds, then the green LED
turn off. If a loop fault exists the Channel LED will come on and
flash indicating a fault. If the fault is self-healing the detector
will continue to operate.The green channel LED will also glow
whenever a vehicle is detected passing over the inductive loop. The
red Power LED at the top of the unit will remain on to indicate
that the unit is powered.
To eliminate interference of two neighbouring wire loops or loop
detectors, the frequency can be altered.
The sensitivity of the detector allows the detector to be selective
as to the change of inductance necessary to produce an output.
There are four sensitivity selections and are set as follows by
DIP3 and DIP4 Switch.
Automatic Sensitivity Boost
Automatic sensitivity boost is selected by DIP5 switch on the front
of the enclosure and is set as follows: OFF - Disabled, ON –
Enabled. Automatic sensitivity boost causes the sensitivity to be
boosted to a maximum on detection on the vehicle, and maintained at
this level during the presence of the vehicle over the loop. When
the vehicle departs the loop and detection is lost the sensitivity
reverts to the pre-selected level.
1) Reset Switch : The reset switch enables the detector to be
manually reset during commissioning and testing . This results in
the detector re-tuning the sensing loop and becoming ready for
vehicle detection ;
2) Selectable Pulse Time : This feature sets the length of time
that the pulse relay will be energized for 1 Second or 0.5 Seconds
3) Pulse Relay Selection : The Pulse Relay may be configured to
energize on detection of a vehicle or when the vehicle leaves the
4) Sensitivity Boost : This feature sets the undetect level to
maximum sensitivity and is used to prevent loss of detection of
high-bed vehicles ;
5) Switch Selectable Sensibility : 4 sensitivity setting are
available on the switches to allow flexibility in configuration ;
6) Switch Selectable Frequency : 4 frequency settings are available
to prevent cross-talk between adjacent loops ;
7) Filter Option : This option is used to provide a delay between
detection of the vehicle and switchiing of the output relay . This
relay is normally used to prevent false detection of small or fast
moving objects ;
8) Permanent Presence Option : This feature ensure detection of the
vehicle will be maintained when the vehicle is parked over the loop
for extended periods .
Technical parameters of Loop Detector
230V AC , 115V AC,24VDC/AC,12V DC/AC
Voltage tolerance AC
+10% / -15%
Voltage tolerance DC
-20°C to +65°C
-40°C to +85°C
20 kHz to 170 kHz
Signal holding time
Adjustable in 3 increments
Total loop plus connection wiring: 50μH to 1000μH. Ideal is 100μH
Loop connection wiring
Maximum length 20 meters, twisted at least 20 times per meter
Size of Housing
78x40x108 mm (L x W x H)
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