Eberle Design, Inc. (EDI) provides access professionals with reliable, high quality
mission critical vehicle detection products that will improve the performance and
lifecycle of your access control systems.
EDI’s wide range of vehicle detection products help technicians save valuable time and
maximize profits by quickly installing, accurately trouble-shooting, and reliably
maintaining access control systems with easy to use hi-tech vehicle detectors that
provide built-in set-up tools, frequency & sensitivity meters, and non-volatile memory
to maintain diagnostic history, all of which are invaluable and always
available – Because they’re built-in!
Sensitivity Meter:
Frequency Meter:
Ten (10) Levels of Sensitivity:
Two Models Cover ALL Voltages:
Advanced Loop Diagnostics:
Loop Fault Memory:
Call Output Memory:
“Delayed” & “Extended” Detection:
The front panel 7-segment LED DEFLECTOMETERTM provides visual feedback and
assistance for setting the correct sensitivity, reading the frequency of the loop, reporting Loop
Faults, and indicating Delay & Extension Timing functions.
With a typical size vehicle over the roadway loop, the DEFLECTOMETERTM functions as a
Sensitivity Meter. The optimum sensitivity setting should provide a reading of “5”. You can
adjust the DEFLECTOMETERTM reading by using the front panel UP or DOWN sensitivity
buttons. Automatic quantitative feedback of the loop system operation ensures that the
detector is set to the most optimum sensitivity level to detect ALL vehicles, including
motorcycles and high-bed vehicles.
Following power-up or reset, the DEFLECTOMETERTM will indicate a 2 or 3 digit number
(quickly flashes) that indicates the loop frequency of the loop & loop network. Keeping your
loops separated by at least 5 KHz avoids crosstalk problems and future service calls.
10 levels of sensitivity (0 to 9) can be easily set using the front panel UP or DOWN push
LMA-1150-LV operates on 12VDC, 24VDC, and 24VAC
LMA-1150-HV operates on 120VAC and 240VAC
The Loop Fault Monitor continually checks the integrity of the loops and will report and store
three types of loop faults; Open Loops, Shorted Loops, and 25% sudden changes in
The Loop Fault Memory uses internal Non-Volatile memory to store and display the current
and previous loop faults utilizing the front panel “Loop Fault” LED and DEFLECTOMETERTM.
A power loss or reset will not delete this memory. A MUST FOR TROUBLESHOOTING!
The detector will not drop a Call state if power is lost for a minimum of 4 seconds or less.
A 2-second CALL “Delay” time and 2, 5, or 10-second CALL “Extension” time can be
; Automatic Tuning - Lightning & Surge Protection - Four (4) Frequency Levels - Compatible with ALL radio controls & remote
openers - Sensitivity Boost - Fail Safe and Fail Secure Configurations - Separate Color-Coded LED indicators - Wide Loop
Inductance Range: 20 to 2500 micro Henries.
Deflectometer is a trademark of Eberle Design Inc.
LMA-1150 Catalog Sheet – 07/08/05
Designed, Manufactured and Tested in the United States of America
Single Channel with Programmable Relay Output
Controls: Rear mounted DIP switches and front panel push buttons allow the user to set up
operational parameters including frequency & sensitivity.
Reset (Power up): The Detector can be manually reset by pressing the front panel RESET button or
interrupting power. Upon power up, the loop frequency is displayed (quickly flashes) on the 7segment DEFLECTOMETER. Following power-up, two or three numbers will display (quickly
flashing) within two seconds. As an example, you may see a “2” then a “5”, indicating 25 kilohertz.
The reset button is also used for reviewing previous loop fault conditions stored in the internal
Setting Sensitivity - Front Panel Sensitivity Push Buttons
The DEFLECTOMETER (front panel 7-segment LED) aids in setting the DETECTOR quickly and
easily to the most optimum sensitivity level to ensure the trouble-free detection of all vehicles,
including motorcycles and high bed vehicles. For typical vehicles (mid-size vehicle / small pick up)
utilizing properly installed roadway loops, a value of 5 displayed on the DEFLECTOMETER during
the DETECT output period indicates an optimum sensitivity setting. For high profile vehicles
(commercial trucks, 4x4’s, etc…), a DEFLECTOMETER reading of 4 will be optimum. For low profile
vehicles (sports cars, etc…), a DEFLECTOMETER reading of 6 will be optimum.
Adjusting sensitivity using the DEFLECTOMETER (recommended):
The DEFLECTOMETER should read zero (0) with no vehicle over the roadway loop. When the
typical vehicle is completely in the detection zone (OUTPUT indicator On), the sensitivity should be
adjusted up or down until the DEFLECTOMETER displays the desired optimum value of 5 (or 4 or 6
as described above).
If a typical vehicle located over the roadway loop causes the number “7” to be displayed on
the DEFLECTOMETER, the sensitivity should be decreased two levels. This can be done by
pressing the front panel SENSª button two times.
If a typical vehicle located over the roadway loop causes the number “2” to be displayed on
the DEFLECTOMETER, the sensitivity should be increased three levels. This can be done by
pressing the front panel SENS© button three times.
Adjusting sensitivity without using the DEFLECTOMETER (manually setting sensitivity):
The DETECTOR offers 10 levels of sensitivity (0 to 9). Level 9 is the highest sensitivity. Sensitivity
can be manually set to any desired level by pressing the front panel SENS buttons (© orª) when a
vehicle is NOT over the roadway loop. The first time a SENS button (© orª) is pressed, the current
sensitivity level is displayed on the DEFLECTOMETER for 5 seconds. If either SENS button (©
orª) is pressed again before the 5 second period ends, the sensitivity setting will increase (SENS
©) or decrease (SENS ª). The new sensitivity value will be displayed on the DEFLECTOMETER
display for 5 seconds. The factory default Sensitivity setting is level 4.
Loop Frequency (2 Position DIP Switch - DIP 1 & 2): One of four settings (normally in the range of
13 to 150 kilohertz) may be selected to alleviate interference which may occur when loops
connected to different detectors are located adjacent to one another. To help eliminate crosstalk
problems, the loop frequency is displayed on the front panel DEFLECTOMETER following power-up
or Reset. The display will indicate a two or three digit number (quickly flashing) that indicates the
loop frequency. As an example you may see a “2” followed by a “5”, indicating 25 kilohertz. This
feature is a great tool for separating frequencies of adjacent loops to avoid crosstalk. Detectors on
adjacent loops should all be separated by at least 5 kilohertz.
Sensitivity Boost (8 Position DIP Switch - DIP 1): When ON, sensitivity will increase only during
the DETECT Output period without changing the sensitivity of a vacant loop. When a vehicle enters
the loop, the Detector sensitivity is boosted to a higher level than the vacant loop setting. The
boosted sensitivity remains throughout the DETECT Output period. When the vehicle leaves the
loop, the sensitivity returns to the vacant loop setting. This feature helps prevent dropouts during the
passage of high bed vehicles and is exceptionally useful in sliding gate situations.
Presence Output Relay Modes (8 Position DIP Switch - DIP 2): Two modes of Presence
operation are selectable; Limited Presence or Infinite Presence. When ON (Limited Presence Mode),
the presence DETECT Output hold time is between 5 minutes minimum and 3 hours maximum. Hold
time depends on loop geometry; number of wire turns in the loop, vehicle size, and position of the
vehicle relative to the loop zone. When OFF (Infinite Presence Mode), the presence DETECT Output
hold time will always be maintained as long as a vehicle is located over the loop zone and power is
not removed from the Detector. Be sure DIP 6 is in the OFF position in these modes.
2-Second Output Delay (8 Position DIP Switch - DIP 3): This feature may be turned ON so the
DETECT output will be delayed for a period of 2 seconds after a vehicle has entered the detection
zone. Note, the DEFLECTOMETER will display the letter “d” during the delay period. If the vehicle
does not remain in the loop zone for the full 2 seconds the delay will terminate and no DETECT
output will be produced.
2, 5, or 10-Second Output Extension (8 Position DIP Switch - DIP 4 & 5): One of three Extend
times, or OFF may be selected for either presence modes. The DETECT output is held for the
selected time after the vehicle has left the zone of detection. Note, the DEFLECTOMETER will
display the letter “E” during the Extend period. This feature does not affect Pulse mode.
Switch 4
Switch 5
0 seconds Extend time.
2 seconds Extend time.
5 seconds Extend time.
10 seconds Extend time.
Pulse Mode (8 Position DIP Switch - DIP 6): DIP 6 enabled (ON) switches the Detector from
Presence Mode to Pulse Mode. DIP 7 offers two modes of Pulse operation; Pulse on Entry (when a
vehicle enters the loop zone) or Pulse on Exit (when a vehicle exits the loop zone). The pulse output
is 250 milliseconds.
Switch 6
Switch 7
250 millisecond pulse on vehicle entry.
250 millisecond pulse on vehicle exit.
Fail Safe Operation (Models LMA-1150-LV & LMA-1150-HV): When the loop fails or power is
removed, continuity exists between Common & Normally Open.
Fail Secure Operation (Models LMA-1150S-LV & LMA-1150S-HV): When the loop fails or power
is removed, continuity exists between Common & Normally Closed.
Loop Fault Monitoring: The Detector continuously checks the integrity of the loop. The system is
able to detect shorted or open circuit loops, or sudden changes in inductance exceeding 25% of the
nominal inductance. If a fault is detected, the OUTPUT and FAULT indicators continuously emit a
sequence of flashes.
Additionally, the 7-Segment DEFLECTOMETER displays the letter “F” indicating a current loop fault.
Each type of fault is identified by a different flash sequence:
Flash Sequence
1 flash
Open Circuit Loop.
2 flashes
Shorted Circuit Loop.
3 flashes
25% excessive change in inductance.
If the Open or Shorted fault condition self heals, the DETECT Output indicator and 7-Segment
DEFLECTOMETER will return to normal operation. The LOOP FAULT indicator will continue to flash
with the sequence signifying the type of fault that was last detected. In the case of the excessive
inductance change fault, the unit will retune to the new inductance after a period of two seconds and
continue operation. The fault condition will be indicated by the flash sequence of the LOOP FAULT
Pressing the “Reset” button will reset the Detector and clear the flash sequence from the Loop Fault
indicator. To review the last loop fault condition, simply press and hold the “Reset” button for 2
seconds. See “Loop Fault Memory” below.
Power Status Indicators (Green LED): Solid ON indicates normal power status during detector
operation. The POWER Indicator will flash every 2 seconds during low input voltage (Brown out)
conditions, indicating insufficient input voltage. In addition to the POWER indictor, the seven (7)
segment DEFLECTOMETER display will be illuminated during normal detector operation.
Detect Output Status Indicator (Red LED):
ƒ Vehicle Detection = Steady ON
ƒ 2-Second Delay = Flashes at a 2 Hz rate
ƒ 2, 5, or 10 Seconds of Extension Time = Flashes at a 4 Hz rate (Presence modes only).
Fault Status Indicator (Yellow LED): While a current fault is being detected, the red OUTPUT and
the yellow LOOP FAULT indicator continuously emit a sequence of flashes together. When only the
yellow LOOP FAULT indicator continuously emits a sequence of flashes, a fault has occurred and
the Detector had self corrected. Each type of fault is identified by a different flash sequence.
Loop Fault Memory: Previous loop faults are stored in non-volatile (internal) memory. If power is
interrupted, for any length of time, the Detector will not loose the last loop condition status, which is
valuable information for troubleshooting purposes. When power is restored to the Detector, the
yellow LOOP FAULT indicator will automatically display the last loop fault status condition (open
loop, shorted loop, 25% change in inductance or no loop problem occurred). Momentarily pressing
the front panel Reset button will reset the loop fault memory and the Detector. To review the last
loop fault condition, simply press and hold the reset button for 2 seconds. See “Loop Fault
DETECT Output Memory: A power loss of 4 seconds or less from nominal input voltage will not
loose the Call state. If power is removed for 4 seconds or less and then restored, the Detector will
automatically restore the Call state present before the power loss.
Loop Inductance (Tuning) Range: 20 to 2500 micro-Henry with a Q factor greater than 5.
Self Tuning: The Detector will automatically tune to any loop and lead-in combination within the
tuning range upon application of power. The unit may be retuned by adjusting the rotary sensitivity
control and resetting to the desired value.
Environmental Tracking: The Detector automatically and continuously compensates for component
drift and environmental effects throughout the tuning range and across the entire temperature range.
Loop Input (Lightning Protection): The loop input incorporates lightning and transient protection
devices and the loop oscillator circuitry is transformer-isolated. The lightning protection will withstand
the discharge of a 10 uF capacitor charged to 2,000V across the loop inputs or between either loop
input and earth ground. The transformer isolation allows operation with a loop which is grounded at
a single point.
Grounded Loop Operation: The Detector will operate when connected to poor quality loops
including those that have a short to ground at a single point.
Input / Output Circuitry Isolation: The loop inputs are isolated by means of the internal loop
isolation transformer. The outputs are isolated by means of the output relay.
Lead-in Length: The Detector will operate with lead-in (feeder) lengths up to 5,000 feet with
appropriate loops and proper lead-in cable.
Output Relay Rating(s): Contacts are rated 5A, 250 VAC, 30 VDC.
Construction: Printed circuit boards are double sided 2 oz copper with plated through holes. Circuit
boards are coated for environmental protection.
ƒ Operating Temperature Range: -34oC to +74oC (-30oF to 165oF)
ƒ Humidity Range: 0 to 95% relative.
ƒ Dimensions: 2.875” (7.30 cm.) long x 1.3750” (3.49 cm.) wide x 3.0625” (7.78 cm.) tall
ƒ Weight: 10 oz.
Power Supply:
ƒ Model LMA-1150-LV & LMA-1150S-LV: 10 to 32 VDC or 14 to 28 VAC, 50 mA max.
ƒ Model LMA-1150-HV & LMA-1150S-HV: 95 to 250 VAC, 50/60 Hz, 0.5 Watts max.
Connector: Rear mount 11 pin male Molex “Amphenol” P/N 86CP11.
Pin Assignment (Connections):
Power, Hot (+)
Power, Neutral (-)
No Connection
No Connection
Output Relay, Common
Output Relay, Normally Open (Closes for DETECT)
Loop Input
Loop Input
No Connection
Output Relay, Normally Closed (Opens for DETECT)
No Connection
NOTE: Relay contacts are shown with power applied, loops connected and no vehicle in the loop
zone (No DETECT Output).
Default Settings:
ƒ Sensitivity .................................................................................................................... Level 4
ƒ Output Relay ................................................................................................ Infinite Presence
ƒ Sensitivity Boost .............................................................................................................. OFF
ƒ 2-Second DETECT Delay................................................................................................ OFF
ƒ 2, 5, or 10-Second DETECT Extend................................................................................ OFF
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