Chamberlain LOOPDETLM Manual page 2

WIRING
1
Plug the loop detector into the desired slot (Shadow, Interrupt, or Exit) on the
expansion board of the operator. NOTE: If only LOOPDETLM loop detectors are
used, manual frequency adjustments are not required and crosstalk is
eliminated. If a LOOPDETLM is used in combination with other alternate loop
detectors, then manual frequency adjustments may be required.
2
Insert the twisted wires from the loop into the corresponding terminal (Shadow,
Interrupt, or Exit) on the expansion board of the operator. Polarity does not
matter.
OPERATION
BLUE LED WHITE LED
1 Blink (every 10 OFF
seconds)
2 Blinks Rapid Blinks (active fault)
or OFF
3 Blinks Rapid Blinks (active fault)
or OFF
4 Blinks Rapid Blinks (active fault)
OFF 2 Blinks
OFF Slow Blinks
Solid Solid
DIAL SETTINGS
TEST Mode
1-8 Determines the sensitivity setting for the loop detector:
1 is the lowest sensitivity (large vehicle) setting and 8 is the
highest sensitivity (small vehicle). Default setting is 4.
PROG Mode
TROUBLESHOOTING
Open or Shorted Loop (2 and 3 Blink errors):
Test the loop detector (refer to TEST THE LOOP DETECTOR section). If the loop
detector passes the test, this indicates the loop detector is working properly and there
is an issue with the loop wiring.
Failed Authentication (4 Blink error):
• Check the wire connecting the expansion board to the main board or
• Unplug the loop detector then plug it back into the same slot (clears all faults and
keeps the current frequency settings, authenticates) or
• Unplug the loop detector. Then unplug the J15 plug on the operator's control
board and plug it back in after 2-3 seconds. This allows the loop detector to be
plugged into a different slot (clears all faults and keeps the current frequency
settings, authenticates).
To clear a fault:
• Press the reset button on the operator (clears all faults) or
• Unplug the loop detector then plug it back into the same slot.
The loop is making false detections:
• There is crosstalk between the LOOPDETLM and the alternate loop detector or
• Change the frequency or lower the sensitivity setting of the loop detector.
The loop will not activate when a vehicle passes over it:
• Turn the boost switch ON or increase the sensitivity of the loop detector or
• If the blue and white LEDs are solid, indicating an Active Loop, and the operator
does not activate, there could be a fault. Once the loop is inactive, check the LED
codes for a fault (refer to LED table above).
01-36190D
EXPLANATION
Normal Operation
Open Loop (see TROUBLESHOOTING)
Shorted Loop (see TROUBLESHOOTING)
Failed Authentication (see
TROUBLESHOOTING)
Successful Reset
Loop detector is in TEST or PROG mode
Active Loop
EXPLANATION
Used to test the loop detector
Used to change the frequency of the loop detector
Shadow Slot
Shadow Loop
FREQUENCY
To change the frequency of the loop detector:
1
Turn the dial to PROG.
2
Press the frequency button to cycle through the 4 frequency settings.
NOTE: The blue LED will blink to indicate the current frequency setting.
To reset frequency to factory default, hold the frequency button for 5 seconds.
BOOST SWITCH
The boost switch will increase the sensitivity of the loop detector to detect high profile
vehicles (such as semi trucks).
White LEDs
(located under dial)
Frequency Button
TEST THE LOOP DETECTOR
1
Turn the dial to TEST. The loop detector will send a signal to the main board
simulating a vehicle over the loop.
Exit: If the gate is closed, it will open or if the gate is already open it will
remain open.
Shadow: Active ONLY when the gate is in the open position. If the gate is
open, it will remain open.
Interrupt: If the gate is closing, it will open.
2
Turn the dial back to the desired sensitivity setting.
WARRANTY
ONE YEAR LIMITED WARRANTY
The Chamberlain Group, Inc. warrants to the first retail purchaser of this product that
is free from defect in materials and/or workmanship for a period of 1 year from the
date of purchase.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO
CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY
INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
©2011 The Chamberlain Group, Inc.
All Rights Reserved
Interrupt Slot Exit Slot
Exit Loop
EXPANSION BOARD
Interrupt Loop
Blue LED
Dial
(located under dial)
Boost Switch
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