- WIRE: 1.5mm SQUARED MULTI STRANDED CABLE (USE SILICON COATED IF PLACED DIRECTLY INTO THE GROUND)
- SPACING BETWEEN TWO ADJACENT LOOPS > 2 METRES. ALTERNATE ADJACENT LOOPS USING DIFFERENT NUMBERS
OF TURNS.
- LOOP AND FEEDER SHOULD COMPRISE ONE LENGTH OF UNJOINED WIRE. IF JOINTS ARE MADE, THEN SOLDER JOINT.
- USE SCREENED FEEDER CABLE IN ELECTRICALLY NOISY ENVIRONMENTS OR WHERE FEEDER RUNS PARALLEL TO
POWER CABLES.
LOOP
CIRCUMFERENCE
IN METRES
> 10
6 - 10
< 6
No. OF
TURNS
2
3
4
M
in
.
1
0
0
m
m
PLASTIC
CONDUIT
3 TURNS MULTI
STRANDED
Brick
Paving
3
0
-5
0
m
m
D
E
E
P
4mm
3 TURNS OF
CABLE MULTI
STRANDED
(SILICON COATED)
(TYPICAL)
FILL WITH EPOXY
COMPOUND OR
BITUMEN MASTIC
ROAD
SURFACE
ROAD
TWIST FEEDER
AT LEAST 20
TURNS PER METRE
Width of cut
4mm
45
300
mm
300
mm
1m
M
a
xi
m
m
r
o
m
m
e
n
d
e
d
u
e
c
f
e
d
e
r
l
g
h
1
0
0
e
e
n
t
m
Loop
detector
D
E
P
T
H
I
N
T
O
R
O
A
D
M
IN
.
3
0
-5
0
m
m
2 m
STANDARD
FEATURES
OF
THE
DETECTOR
ARE:
-
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.
-
Selectable
Pulse
Time.
This feature sets the length of time that the pulse relay will be energised for. 1 Second or 0.2 Second.
-
Pulse
Relay
Selection.
The Pulse relay may be configured to energise on detection of vehicle leaves the loop or when the vehicle leaves the loop.
-
Switch
selectable
Sensitivity.
Four sensitivity settings are available on the switches to allow flexibility in configuration.
1 High - 0.01% 5 - 0.2%
2 - 0.02% 6 - 0.5%
3 - 0.05% 7 - 1%
4 - 0.1% 8 Low - 2%
-
Switch
selectable
Frequency.
Two frequency settings are available to prevent cross-talk between adjacent loops.
-
Permanent
Presence
Option.
This feature ensures detection of the vehicle will be maintained when the vehicle is parked over the loop for extended periods.
-
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 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.
-
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.
DETAIL A
VEHICLE LOOP DETECTOR
LD 102
WARNING:
DO NOT OPEN HOUSING WITH POWER ON.
WIRING
CONNECTIONS
EXTEND
SENS 0,02%
SENS 0.01%
SENS 0.05%
SENS 0.1%
SENS 0.2%
SENS 0.5%
SENS 1%
SENS 2%
FREQ.
ASB
FILTER
PERM.PRES
PULSE MODE
PULSE TIME
CONNECTION
11-26V AC/DC
]
+
- 50/60 Hz 95mA
PULSE RLY N/O
PULSE RLY COM
PRESENCE RLY N/O
PRESENCE RLY COM
LOOP
LOOP
EARTH
PRES. RLY N/C
PRES. RLY N/C
2SEC
-
S9
S8
S8/S9
S7
S7/S9
S7/S8
S7/S8/S9
LOW
ON
2SEC
ON
UNDET
1SEC
ON
OFF
S7/S8/S9
S7/S8
S7/S8
S7
S8/S9
S8
S9
-
HI
OFF
OFF
OFF
DET
0.2SEC
PIN
1
2
3
4
5
6
7
8
9
10
11
OFF
DETAIL B
(Recommended
settings)
Note: If two
detectors are used,
set different
frequencies (S6)
DETECT
POWER
LOOP FAULT
PROCON
ELECTRONICS
EXTEND
SENS
SENS
SENS
FREQ
ASB
FILTER
PRES
PULSE MODE
PULSE TIME
D
IP
O
N
1
2
3
4
5
6
7
D
IP
9
1
0
8
24
24
8.2.4.3 LOOP DETAILS
Summary of Contents for CP71
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Page 4: ...4 4...
Page 7: ...7 7 4 2 DETERMINATION OF OPERATIONAL MODE...
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