jcm-tech DETEC-1/DP Guia De Inicio Rapido página 4

Single Channel Loop Detector
Model – DETEC-1/DP & DETEC-1/DP 12/24
The DETEC-1/DP is a single channel inductive loop detector designed for parking and access control
applications. The detector is connected to an inductive loop mounted in the road surface. When vehicles
pass over the loop the detector switches on an output.
Typical applications in the parking and access control environments are safety loops for barriers or gates,
arming loops for activating card dispensers, entry or exit loops and vehicle counting.
The DETEC-1/DP is compatible with most dual channel detectors on the market and is easy to set-up and
install.
Features
Reset Switch. Pressing 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.
Switch selectable Sensitivity. The detect sensitivity is the minimum change in inductance required to produce a
detect output. (%ΔL/L). Eight sensitivity settings are available on the switches to allow flexibility in configuration.
Switch selectable Frequency. The frequency of the loop is determined by the inductance of the loop and the
frequency switch setting. If the frequency switch is on, the frequency is reduced. It may be necessary to change
the frequency to prevent cross-talk between adjacent loops on different detectors.
Sensitivity Boost. This feature sets the undetect level to maximum sensitivity and is used to prevent loss of
detection of high-bed vehicles.
Filter Option. This option is used to provide a delay of 2 Seconds between detection of the vehicle and switching
of the output relay. This delay is normally used to prevent false detection of small or fast moving objects.
Extend Option. When switched on this feature extends the presence output relay for 2 Seconds after the vehicle
has left the loop.
Permanent Presence. This feature ensures detection of the vehicle will be maintained when the vehicle is
parked over the loop for extended periods.
Pulse Relay Selection. The detect relay may be configured for a pulse output, and to energise on detection of a
vehicle or when the vehicle leaves the loop.
Selectable Pulse Time. This feature sets the length of time that the pulse relay will be energised. 1 Second or
0.2 Second.
Indicators
Power Indicator. This LED Indicator illuminates when power is present.
Detect Indicator. This LED Indicator is illuminated when there is a vehicle over the loop or the loop is
faulty. This LED can also be used to determine the loop frequency. On reset, count the number of times the
LED flashes. Multiply this number by 10KHz.For example: if the LED flashes 6 times, then the loop
frequency is between 60KHz and 70KHz.
Loop Fault Indicator. This LED Indicator is illuminated when the loop is either open circuit or short circuit
and is used to give a visual indication of a faulty loop.
1226048_v1.0
Relay Functionality
RELAYS VEHICLE
PRESENT
N/O CLOSED
PRESENCE
N/C OPEN
RELAY
N/O PULSE CLOSED
PULSE
N/C PULSE OPEN
RELAY
Wiring Diagram
5
10 PRESENCE RELAY
OUTPUT
6
TWISTED
LOOP
DETEC-1/DP 220VAC
EARTH
Loop Installation Guide
1. The detector should be installed in a waterproof housing as close to the loop as possible.
2. The loop and feeder should be made from insulated copper wire with a minimum cross-sectional area of
2
1.5mm . The feeder should be twisted with at least 20 turns per metre. Joints in the wire are not
recommended and must be soldered and made waterproof. Faulty joints could lead to incorrect operation of
the detector. Feeders which may pick up electrical noise should use screened cable, with the screen earthed
at the detector.
3. The loop should be either square or rectangular in shape with a minimum distance of 1 metre between
opposite sides. Normally 3 turns of wire are used in the loop. Large loops with a circumference of greater than
10 metres should use 2 turns while small loops with a circumference of less than 6 metres should use 4 turns.
When two loops are used in close proximity to each other it is recommended that 3 turns are used in one and
4 turns in the other to prevent cross-talk.
4. Cross-talk is a term used to describe the interference between two adjacent loops. To avoid incorrect
operation of the detector, the loops should be at least 2 metres apart and on different frequency settings.
5. For loop installation, slots should be cut in the road using a masonry cutting tool. A 45
across the corners to prevent damage to the wire on the corners. The slot should be about 4mm wide and
30mm to 50mm deep. Remember to extend the slot from one of the corners to the road-side to accommodate
the feeder.
1226048_v1.0
1
NO LOOP NO
VEHICLE FAULTY POWER
OPEN CLOSED CLOSED
CLOSED OPEN OPEN
OPEN OPEN OPEN
CLOSED CLOSED CLOSED
3
11 PULSE RELAY
OUTPUT
4
7
LOOP INPUT
8
1
2 POWER INPUT
9
o
cut should be made
3
Technical Specifications
Power supply DETEC-1/DP
DETEC-1/DP 12/24
Change over contact 0.5A/220VAC (Fail Safe – normally energized)
Presence Relay
Change over contact 0.5A/220VAC(Non Fail Safe–normally denergised)
Pulse Relay
Approximately 120ms after vehicle enters loop.
Response time
LED indicators show: Power, Detect state and Loop Fault.
Indicators
15 - 1500uH
Detector tuning range
Approx. 23 – 130KHz
Loop Frequency
20 Seconds
Power Fail Memory
Automatic Compensation
Environmental tracking
Loop isolation transformer with zener diodes and gas discharge tube.
Protection
11 Pin Connector on rear of unit.
Connector
80mm (height) X 40mm (width) X 79mm (Depth excl. connector).
Dimensions
-40°C to +80°C
Operating Temperature
-40°C to +85°C
Storage Temperature
Switch Settings
DETEC-1/DP Switch Settings
Switch No. Function
10 Presence Relay Extend Time
7,8,9 Sensitivity 0.02%
7,8,9 Sensitivity 0.01%
7,8,9 Sensitivity 0.05%
7,8,9 Sensitivity 0.1%
7,8,9 Sensitivity 0.2%
7,8,9 Sensitivity 0.5%
7,8,9 Sensitivity 1%
7,8,9 Sensitivity 2%
6 Frequency
5 ASB
4 Filter
3 Permanent Presence
2 Pulse Mode
1 Pulse Time
1226048_v1.0
6. Best results are obtained when a single length of wire is used with no joints. This may be achieved by running
the wire from the detector to the loop, around the loop for 3 turns and then back to the detector. The feeder
portion of the wire is then twisted. Remember that twisting the feeder will shorten its length, so ensure a long
enough feeder wire is used.
7. After the loop and feeder wires have been placed in the slot, the slot is filled with epoxy compound or bitumen
filler.
TRAFFIC DIRECTION
300mm 300mm
ROAD
1M
EDGE
O
45 CROSSCUT
FEEDER
Diagnostics
SYMPTOM POSSIBLE CAUSE
The POWER LED is not No power supply voltage on
on. the input.
The DETECT LED flashes There may be a poor
erratically. connection in the loop or
loop feeder.
The detector may be
experiencing crosstalk with
the loop of an adjacent
detector.
The DETECT LED Faulty loop or loop feeder
randomly stays on. wiring.
Movement of the loop in the
ground.
The LOOP FAULT LED is The loop inductance is too
flashing. small or the loop is short
circuit.
The LOOP FAULT LED is The loop inductance is too
permanently illuminated. large or the loop is open
circuit.
EC Declaration of conformity
See web www.jcm-tech.com
1226048_v1.0
200 - 260VAC 50Hz 1.5VA
11 - 26VAC/DC 50/60Hz 95mA max
ON OFF
2 Sec Off
- S7/S8/S9
S9 S7/S8
S8 S7/S9
S8/S9 S7
S7 S8/S9
S7/S9 S8
S7/S8 S9
S7/S8/S9 -
Low High
On Off
2 Sec Off
On Off
Undetect Detect
1 Sec 0.2 Sec
2
ROAD SURFACE
SLOT
30-50 mm
SEALANT
WIRES
4mm
SOLUTION
Check that the power supply is
correctly wired to the detector.
(PINS 1 and 2)
Check all wiring. Tighten screw
terminals. Check for broken wires.
Try changing frequencies using the
frequency switch. Put the detector
with the larger loop onto low
frequency and the detector with the
smaller loop onto high frequency.
Check the wiring. Tighten screw
terminals. Check for pinched or bent
wires. Is the feeder wire twisted?
Check for cracks in the road surface
near the loop.
Check that there is no short circuit
on the loop feeder wiring or the loop.
If there is no short circuit then the
inductance is to small and more
turns of wire should be added to the
loop.
Check that there is electrical
continuity on the loop. This can be
done using a multimeter on the
ohms range (< 5 Ω). If the loop
inductance is too large then try
reducing the number of turns.
4