Reno A&E BX Series User manual

Model BX Operating Instructions 09-05-01.doc 4RENO A&E P/N 551-2900-00
Reno A & E
4655 Aircenter Circle
Reno, NV 89502-5948 USA
Telephone: [phone]
Fax: [phone]
Website: www.renoae.com
E-mail: [e-mail]
Engineering Excellence!
Loop Installation
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. 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.
Loop Installation - Saw Cut Type
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.
OPERATING INSTRUCTIONS FOR
Model BX Series
SINGLE CHANNEL LOOP DETECTORS
I General
Please verify source voltage before applying power. The model designations indicate the
input power required for each detector as follows:
Model BX-3 BX-7 BX-8 BX-23 BX-24
Voltage 120VAC 24VAC 240VAC 12VDC 24VDC
Each detector is factory configured for either Fail-Safe or Fail-Secure operation (see unit side
label).
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 PWR Power LED DET Detect LED FAIL LED
Off No power or low power Output off Loop OK
On Normal power to detector Output on Open Loop
Flash N/A 4 Hz - 2 second timing
delay 1 Hz – Shorted Loop
3 Hz - 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 BX
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. 0 is lowest
and 7 is highest, with normal (factory default) being 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
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
Recommended Loop Wire: Reno LW-120 for 1/8" slots
Reno LW-116-S for 1/4" slots
ROAD SURFACE
MIN
1"
SAW SLOT
SEALANT
BACKER ROD
1" piece
spaced about
ever
y
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
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

23
Front Panel DIP Switches
Switch On Off Factory Default
1 Off
2 See Table under Frequency Section Off
3 Normal Presence Infinite Presence Off
4 Sensitivity Boost No Boost Off
5 2 Second Delay No Delay Off
6 Overrides Switches 7 & 8 No Effect Off
7 Exit Pulse Entry Pulse Off
8 Presence Mode Pulse Mode Off
Frequency (DIP switches 1 and 2)
Switch Low Medium-Low Medium-High High
1 On Off On Off
2 On On Off Off
Loop frequency is controlled by DIP switches 1 and 2 on the front panel. Sometimes where loops are in
close proximity, it is necessary to select a different frequency for each loop to avoid loop interference –
commonly known as crosstalk. Four frequencies are available as shown in the above table. High is the
default frequency.
Normal Presence/Infinite Presence (DIP switch 3)
Output A is always a presence output. The detector has two presence hold time modes: Limited Presence
and True Presence. When set for True Presence (DIP switch 3 OFF), the detector will hold the output Call
for as long as the vehicle is present and power is not removed or reset applied. True Presence time applies
only for normal size automobiles and trucks and for normal size loops (approximately 12 ft2to 120 ft2).
When set for Limited Presence (DIP switch 3 ON), the detector will typically hold the output Call for about
one to three hours when a vehicle is in the detect zone.
Sensitivity Boost (DIP Switch 4)
DIP switch 4 can be turned ON to increase sensitivity only during the detect period without changing the
sensitivity of a vacant loop. When a vehicle enters the loop, the detector then automatically boosts the
loop sensitivity but only during the detect condition. As soon as no vehicle is detected, the detector
immediately returns to the original sensitivity level. This feature helps prevent dropouts during the
passage of high-bed vehicles and is particularly useful in sliding gate situations.
Output Delay (DIP Switch 5)
A 2 second delay of outputs A and B can be activated by setting DIP switch 5 to the ON position. Output
delay is the time the detector output is delayed after a vehicle first enters the loop detection area. If the 2
second Output Delay feature is activated, the output relays will only be turned on after 2 seconds has
passed with a vehicle continuously present in the loop detection area. If a vehicle leaves the loop detection
area during the 2 second delay interval, detection is aborted and the next vehicle to enter the loop detection
area will initiate a new full 2 second delay interval. By flashing the front panel DET LED at 4 Hz with a
50% duty cycle, the detector indicates that a vehicle is being detected but that the output is being delayed.
Fault Output (DIP switch 6)
When in the ON position relay B will output a “Fault” signal only when a loop fault condition exists. If
the loop fault self-corrects, relay B will assume the “No Fault” output state. Selecting ON for this DIP
switch overrides settings on DIP switches 7 and 8.
Entry Pulse/Exit Pulse (DIP switch 7)
In Pulse Mode (with DIP switch 8 set to OFF), the detector can be programmed to output a 250
millisecond pulse only upon vehicle entry over the loop or only upon vehicle exit from the loop. DIP
switch 7 has no effect on output A (the presence output).
Presence/Pulse (DIP Switch 8)
Relay B has 2 modes of operation: Presence and Pulse. When in Pulse mode (DIP switch 8 set to OFF),
the 250 ms pulse can be set for entry pulse or exit pulse via DIP switch 7. When in Presence mode (DIP
switch 8 set to on), the presence hold time is the same as Output A.
III Reset
Changing any DIP switch position (except 1 or 2) will reset the detector. After changing the
frequency selection switches, the detector will require a reset (a reset will clear the loop fault
memory).
IV Call Memory
When power is removed for 2 seconds or less, the detector automatically “remembers” if a
vehicle was present and a Call was in effect. When power is restored, the detector will continue
to output a Call until the vehicle leaves the loop (Power loss or dips of 2 seconds or less will
not bring a gate arm down onto cars as they wait at the gate).
V Failed Loop Diagnostics
The FAIL LED indicates whether or not the loop is currently within tolerance. If out of
tolerance, the LED indicates whether the loop is shorted (1 Hz flash) or open (steady ON). If
and when the loop returns to within tolerance, the FAIL LED will flash 3 flashes once per
second to indicate an intermittent loop fault has occurred and corrected. This flash rate will
continue until another loop fault occurs, the detector is reset, or the detector loses power.
VI Pin Connections
Pin Wire Color BX-3, BX-7, BX-8,
BX-23, BX-24 BX-8-E, BX-8-ES
1 Black Power (Line) Power (Line)
2 White Power (Neutral) Power (Neutral)
3 Orange Relay B,
Normally Open (N.O.) Relay B, Normally Open (N.O.)
4 Green No Connection Relay B,
Common
5 Yellow Relay A, Common Relay A,
Normally Open (N.O.)
6 Blue Relay A,
Normally Open (N.O.) Relay A, Common
7 Gray Loop Loop
8 Brown Loop Loop
9 Red Relay B, Common No Connection
10 Black/White Relay A,
Normally Closed (N.C.) Relay A, Normally Closed (N.C.)
11 Red/White Relay B,
Normally Closed (N.C.) Relay B, Normally Closed (N.C)
Notes: Wire colors apply to Reno A&E Model 802-4 wiring harness.
The relay contacts shown above are with power applied, loops connected,
and no vehicle present. Relay B (pulse relay) always operates in Fail
Secure mode when power fails.
VII Fuse (Automatic Recovery – BX-7 only)
If 120VAC power is applied to the Model BX-7 (24VAC), the automatic fuse will open. The
fuse will automatically reset when power is removed for 3 seconds. Check source voltage
before reinstalling.
VIII Warnings
Separately for each loop, a twisted pair should be created consisting of only two (2) loop wires
all the way from the loop to the detector (including through all wiring harnesses) at
approximately six (6) full twists per foot. For trouble free operation, it is highly recommended
that all connections (including crimped connectors) be soldered.