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#223 LOOP DETECTOR

The #223 Loop Detector is designed to detect the presence of vehicular traffic. A Loop Detector may be used in a variety of applications including SAFETY loops, FREE EXIT loops, and SHADOW loops (also know as under-gate loops). The placement of the loop and where the detector is connected to the circuit board of the gate determines what type of loop you have constructed.

CONNECTIONS:

The #223 Loop Detector requires from 9 to 30 volts AC or 11.5 to 40 volts DC Stand-by current drain is approximately 16mA.

 
11 pin socket base Connection
#1 Supply Live (POSITIVE)
#2 Supply Neutral (NEGATIVE)
#3 Pulse Output N.0
#4 Chassis Ground
#5 Presence Output Common
#6 Presence Output
#7 Loop
#8 Loop
#9 Pulse Output Common
#10 Presence Output N.C.
#11 Not Used
 
For a typical installation on an Apollo Gate Operator, connect loop detector terminal #1 to 12V, #2 to GND, #5 and #6 to the proper set of inputs, either 9 & 10, 11 & 12, or 13 & 14, and connect your loop lead in wires to terminals #7 and #8 of the socket base.

SETTINGS:

Place the switches in the desired positions. Sh is High Sensitivity, SI is Low Sensitivity, FI is Low Frequency, and Fh is High Frequency. Wien more than one detector is used in an installation, alternating the frequency settings will usually eliminate any crosstalk.

LOOP CONSTRUCTION:

The construction and placement of the LOOP itself are very important in determining its reliability Recommended loop size is 6x6 to 6x12. Loops with permiters up to 25 feet should have 3 turns. Those exceeding 25 feet should have 2 turns. Loops are normally wound into slots 1-1/2 inches deep cut into the surface of the road. These slots are easily made using a concrete saw. Cars should be taken to miter or round the comers of the loop. Loops are normally made from #12 or #14 AGW stranded wire (THHN or XHHW). The lead-in from the loop should no more than 300 feet and should be twisted at least 5 turns per foot.
 
In this installation, 2 SAFETY loops are being used on one day detector and 1 FREE EXIT loop is being used on a second. The relay contacts from the SAFETY detector again go to the circuit board terminals #13 & #14. The relay contacts from the FREE EXIT detector go to the board terminals #9 & #10. No SHADOW loop is needed since the SLIDE GATE will not ever pass over any of the loops...
 
 
This installation uses 2 SAFETY loops on 1 detector and 1 SHADOW loop on a second detector. The relay contacts from the SAFETY detector go to our terminals #13 & #14. While the relay contacts for the SHADOW detector go to our terminals #11 & #12. The SHADOW inputs (#11 & #12) are unique in that they are only active when the gate is open. When the gate begins closing, the inputs go in-active thus allowing the gate to swing over the loop without the board sensing it...
 
 
The Loop wire starts at the detector, goes to one corner of the loop, makes three turns (circles) around the loop, then ends up at the same corner as you began and then returns to the detector. Remember to twist the LEAD-IN wire 5 turns per foot minimum. Also remember to keep the loop at least 3 feet from the gate at all times in order to eliminate false activation by movement of the gate.
 
More information on exit probes and loops. (click here).


 
 

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Revised: September 06, 2010 .
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