Controlled Products Systems Group K24M - Manual

Model K Operating Instructions 12-19-03 (551-1100-00).doc 4 RENO A&E P/N 551-1100-00
Reno A & E
4655 Aircenter Circle
Reno, NV 89502-5948 USA
Telephone: (775) 826-2020
Fax: (775) 826-9191
Website: www.renoae.com
E-mail: [email protected] Engineering Excellence!
L o o p I n s t a l l a t i o n
The vehicle detection characteristics of the inductive loop detector are greatly influenced by the loop size
and proximity to moving metal objects such as gates. Vehicles such as small motorcycles and high-bed
trucks can be reliably detected if the proper size loop is selected. If the loop is placed too close to a moving
metal gate, the detector may detect the gate. The diagram below is intended as a reference for the
dimensions that will influence the detection characteristics.
General Rules
1. The detection height for a loop is 2/3rds the shortest leg (A or
B) of the loop. Example: Short leg = 6’ then Height = 4’ (2/3 x
6).
2. As leg A is made longer, distance C will need to increase.
3. For reliable detection of small motorcycles, legs A and B
should not exceed 6 feet.
L o o p I n s t a l l a t i o n - S a w C u t T y p e
1 Mark the loop layout on the pavement. Remove sharp inside corners that can damage the loop wire insulation.
2 Set the saw to cut to a depth (typically 2" to 2.5") that insures a minimum of 1" from the top of the wire to pavement
surface. The saw cut width should be larger than the wire diameter to avoid damage to the wire insulation when placed
in the saw slot. Cut the loop and feeder slots. Remove all debris from the saw slot with compressed air. Check that the
bottom of the slot is smooth.
3 It is highly recommended that a continuous length of wire be used to form the loop and feeder to the detector. Loop wire
is typically 14, 16, 18, or 20 AWG with cross-linked polyethylene insulation. Use a wood stick or roller to insert the wire
to the bottom of the saw slot (do not use sharp objects). Wrap the wire in the loop saw slot until the desired number of
turns is reached. Each turn of wire must lay flat on top of the previous turn.
4 The wire must be twisted together a minimum of 6 twists per foot from the end of the saw slot to the detector.
5 The wire must be held firmly in the slot with 1" pieces of backer rod every 1 to 2 feet. This prevents the wire from
floating when the loop sealant is applied.
6 Apply the sealant. The sealant selected should have good adhering properties with similar contraction and expansion
characteristics to that of the pavement material.
O P E R A T I N G I N S T R U C T I O N S F O R
Model K Series
PC BOARD LOOP DETECT ORS
I General
The Model K can be configured for 24 VAC or 120 VAC input power and Fail Safe
or Fail Secure mode of operation.
The model number designates the configuration as follows:
Model K-XXX-X
Blank or S. Blank = Fail Safe, S = Fail Secure.
24 or 120. 24 = 24 VAC input, 120 = 120 VAC input.
Please verify source voltage before applying power.
Fail Safe Fail Secure
Relay Power Failure Loop Failure Power Failure Loop Failure
A Call Call No Call No Call
B No Call No Call No Call No Call
II Indicators and Controls
Status Power LED Detect LED Fail LED
Off No power or low power Output Off Loop OK
On Normal power Output On Open Loop
Flash N/A
4 Hz – 2 second
timing delay
1Hz - Shorted Loop
3/sec - Prior Loop Failure
Note: If the supply voltage drops below 75% of the nominal supply voltage, the
power LED will turn off, providing a visual check of low supply voltage. Model K
detectors operate with supply voltage as low as 70% of nominal supply voltage.
Sensitivity Level Rotary Switch
The 8-position rotary switch selects one of eight sensitivity levels as shown below.
Zero (0) is the lowest and seven (7) is the highest, with the normal (factory default)
being three (3). Use the lowest sensitivity setting that detects the desired vehicles.
Position 0 1 2 3 4 5 6 7
 L/L 1.28% 0.64% 0.32% 0.16% 0.08% 0.04% 0.02% 0.01%
A = 6 ft 9 ft 12 ft 15 ft 18 ft 21 ft
C = 3 ft 4 ft 4.5 ft 5 ft 5.5 ft 6 ft
A
B
C
A = Loop dimension parallel to the gate
B = Loop dimension perpendicular to the gate
C = Distance of the loop from the gate
SLIDE GATE
Recommended Loop Wire: Reno LW-120 for 1/8" slots
Reno LW-116-S for 1/4" slots
1
3 1/8" to 1/4" SAW SLOT
THE WIRE IS
CONTINUOUSLY WOUND
IN THE LOOP SAW SLOT
FOR THE REQUIRED
NUMBER OF TURNS (2
turns shown)
turn 2
turn 1
REMOVE SHARP
INSIDE CORNERS
FEEDER SLOT
END OF SAW CUT
4
THE WIRES MUST BE
TWISTED TOGETHER
6 TWISTS PER FOOT
FROM THE END OF
THE SAW CUT TO
THE DETECTOR
ROAD SURFACE
MIN
1"
SAW SLOT
SEALANT
BACKER ROD
1" piece
spaced about
every 1'
LOOP WIRE
3 TURNS
2
6
5
LOOP PERIMETER NUMBER OF TURNS
10 feet - 13 feet 4
14 feet - 26 feet 3
27 feet - 80 feet 2
81 feet and up 1