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Front Indicators 

 

 
 

1. Green Led is ON - the detector is powered.  

 

2. Red Led is ON - the detector detected a vehicle  

 

3. Green Led is Blinking - the loop failed and is shorted or disconnected  

 

4. Green Led is Blinking with two consecutive fast blinks - the loop failed in the past and 

 

    now is working correctly.  

 

5. Red Led is Blinking at the start of a vehicle detection - the Filter function is ON  

 

6. Red Led is Blinking at the end of a vehicle detection - the Extend function is ON  

 

7. Red Led is Blinking during a vehicle detection - 4 minute limited presence time has  

 

    expired. 

 

Note: 

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

 

Front Controls

 

 
Reset   

 

This toggle switch when pushed momentarily down will reset the detector 

 
Frequency Counter  This toggle switch when pushed momentarily up will count the frequency on 

the loop. This count is displayed by the Red Led blinks, each blink represents 
frequency of 10K Hz. Count between 3 to 13 blinks confirms that the loop 
detector is tuned to the loop.  

 

Frequency  

This toggle switch controls the loop frequency. Set different frequencies on 
adjacent loops. Verify frequencies with the frequency counter by counting the 
Red Led blinks. 

 

Back Controls 

 

Sensitivity 

 

This rotary switch controls the detector sensitivity. During normal operation the  
sensitivity level is set to 3 or 4.  

 

DIP Switch Functions

 

 

DIP

 

OFF

 

ON

 

1 Pulse on Relay II 

Presence on Relay II  

2 Pulse on detect 

Pulse on Un-detect  

3 Constant presence  4 minute limited presence time  
4 "Fail Secure" 

"Fail Safe"  

5 Filter Off 

Filter On  

6 ASB Off  

Automatic Sensitivity Boost  On  

7 Extend detect 

6 seconds  

8 Extend detect 

3 seconds  

 

 

 

 

 

When Dip 7 and 8 are in ON position the extend time is 9 seconds. 
 

Warning:

 Do not use limited presence setting and / or "Fail Secure" setting for reversing gates, 

doors or barriers. 

 
 
 
 

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