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We have designed the new LP D-TEK vehicle loop detector with the following objectives in mind: 
 
 

1. Low current consumption, maximum 9 mA current draw in fail safe or fail secure. 

 

2. All the controls are accessible from the outside for easy installation and operation.  

 

3. Integral loop conditioner is provided, to enable detector operation with marginal loops.  

 

4. Provide all the features and controls necessary for a variety of applications.  

 

5. Use metal housing for maximum durability and RF blocking.  

 

6. Provide maximum surge protection on all inputs and outputs of the detector. 

 

7. Compact package to allow easy installation into small operator housings. 

 
We took extra care to achieve and exceed these objectives. For example the controls are divided 
into two groups. The group on the front of the detector is for basic operation and the group on the 
back of the detector is for advanced settings. This way the more advanced settings are not visible 
to the casual user.  
 
There is no skimping on the quality in the D-TEK detector. The housing is made from aircraft 
quality anodized aluminum. All the switches have gold plated contacts and are sealed for 
protection. The detector is protected by easily replaceable fuse, snubbing circuitry on the relay 
contacts, metal oxide varistor on the power input and triple protection on the loop input. 
 
The D-TEK features are extensive and they include full loop diagnostics with frequency counter, 10 
sensitivity settings, delay and extend features, "fail safe" and "fail secure" operation, automatic 
sensitivity boost, pulse or two presence relay operation and more.  
 

Operation Information

 

  

Detector Connections 

 

 

 

 

 

 

Pin    Function                      

 

Harness 

 

 

1       Power                                    

White 12 -24 Volts DC 

 

 

2       Power   

 

 

 

Black 12 – 24 Volts DC 

 

 

3       Relay 2 N.O                           

Orange 

 

 

4       Ground                                  

Green 

 

 

5       Presence Relay Comm.                  Yellow 

 

 

6       Presence Relay N.O.                      Blue 

 

 

7       Loop                                      

Gray 

 

 

8       Loop                                      

Brown 

 

 

9       Relay 2 Comm.                        

Red 

 

 

10     Presence Relay N.C.                       Pink 

 

 

11     Relay 2 N.C.                          

Violet 

 
 

Note:  Functions on pins 6 and 10 are reversed if DIP 4 is set to 

OFF

 "Fail  Secure" 

operation  

 
 
 
 
 
 

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