2. Product identification
The FLUX SA is a single channel stand-alone inductive loop detector
designed for vehicle access applications.
The detector is responsive, highly sensitive, and utilises sophisticated
software algorithms which adapt to prevent false triggering due to
changing environmental conditions. Easy to use dipswitches, as well as
visual and audible feedback of loop operation, ensure a hassle-free
installation experience.
Typical uses include free-exit loops, safety loops, closing loops for
traffic barriers, arming loops for access control equipment, and
general vehicle sensing applications.
1. Introduction
IMPORTANT
Safety Instructions
1. All installation, repair, and service work to this product must be
carried out by a suitably qualified person.
2. Do not in any way modify the components of the system.
3. Do not install this product near sensitive electrical components
(e.g. the DOSS sensor inside a CENTSYS gate operator
housing).
4. Do not install the equipment in an explosive atmosphere: The
presence of flammable gas or fumes is a serious danger to safety.
5. Before attempting any work on the system, cut electrical power
and disconnect the batteries.
6. Do not leave packing materials (plastic, polystyrene, etc.) within
reach of children, as such materials are potential sources of
danger.
7. Dispose of all waste products like packaging materials, etc.,
according to local regulations.
8. does not accept any liability caused by improper
use of the product, or for use other than that for which
the system was intended.
9. This product was designed and built strictly for the use indicated
in this documentation. Any other use, not expressly indicated
here, could compromise the service life/operation of the product
and/or be a source of danger.
10. Anything not expressly specified in these instructions is not
permitted.
CENTSYS
3. Technical specifications
Supply voltage
Standby current
Output relay rating
Detection time
Indicators
Visual
Audible
Detector tuning range
Surge protection
Connectors
Dimensions
Mass
IP rating
10 - 40V DC
7 - 28V AC
50mA
1A @ 125V AC
4ms @ 100kHz loop frequency
10ms @ 40kHz loop frequency
LED indicators showing Power, Loop Fault,
Loop detection level (5 LEDs), Detect
Buzzer with indication of loop detection level
and loop fault
15 - 1500µH
Isolation transformer with 10kA lightning
protection
Removable connectors for ease of
maintenance
105mm (length) X 60mm (width) X 26mm
(height)
85 grams
IP50
4. Standard features of the detector
Pressing the reset button enables the detector to be
manually reset at any time. This results in the
detector re-tuning the sensing loop and becoming
ready for vehicle detection. In addition, a 0.5s
output pulse will be generated.
If this switch is ON, the detector is in Run Mode, and
functions normally. If OFF, the detector halts, and
the output relay defaults to the detected state. This
is useful when working on a traffic barrier, as it will
prevent the barrier from lowering.
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 by approximately 25%. It may be
necessary to change the frequency to prevent cross-
talk between adjacent loops.
Frequency
Selection
Switch
Controls the audible indicator – a useful diagnostic
tool when setting up the loop
Configures the output as either pulsed or presence
Pulse/
Presence
Switch If pulsed output is selected, this switch configures
the output pulse to be generated when the vehicle
is either detected (enters the loop), or undetected
(exits the loop).
Detect/
Undetect
Switch
This switch enables a delay of two seconds between
detection of the vehicle and switching of the output.
This delay is normally used to prevent false
detection of fast-moving objects.
Filter Switch
This option increases the sensitivity of the detector
after initial detection of a vehicle. This is useful to
reliably detect vehicle and trailer combinations.
Sensitivity returns to the selected value once the
vehicle has been undetected.
Automatic
Sensitivity
Boost (ASB)
Switch
If selected together with Presence Output, the
output will remain active as long as a vehicle
remains on the loop. The danger of using this
setting is that any change in the environment (for
example the introduction of metal into the vicinity
of the loop) will not automatically be tuned out
without pressing the reset button. If not selected,
the loop will automatically tune out any permanent
detection after five minutes.
Permanent
Presence
Switch
Adjustable
Loop
Sensitivity
Switches
This red LED is on when power is present, and the
controller is functioning.
Power
Indicator LED
This red LED is illuminated when there is a loop
fault. If the loop is open circuit, the Fault LED will
flash continuously. If the loop is short circuit, it will
remain on.
Loop Fault
Indicator LED
These five red LEDs provide a visual indication of
the Detection Level. Once all five LEDs are on, the
detection threshold is almost reached. This is a very
useful feature to determine if the loop is going to
perform reliably. With no vehicle in the vicinity, all
the LEDs should be off.
Detection
Level
Indicator
LEDs
1. Connectors
2. FLUX SA housing
3. Bootloader header
4. Reset button
5. Diagnostic LEDs
6. Dipswitches
7. Dipswitch cover
1
3
5
6
7
Sensitivity
Dipswitches
LED indicators
Reset Button
Run Switch
Buzzer Enable
Switch
SENS 1 SENS 2
OFF OFF
OFF ON
OFF
ON
ON
ON
Four sensitivity settings are available
High
Medium high
Medium low
Low
