2
iii DIP Switches
Switch
OFF
ON
Factory Default
1
Frequency
(See table in Frequency section)
OFF
2
ON
3
Fail-Safe
Fail-Secure
OFF
4
No Boost
Sensitivity Boost
OFF
5
Detect Output Delay
(See table in Output Delay section)
OFF
6
OFF
7
Detect Output Extension
(See table in Output Extension section)
OFF
8
OFF
Frequency (DIP Switches 1 and 2)
When loops are located in close proximity to one another it may be necessary to
select different frequencies for each loop to avoid loop interference, commonly
known as crosstalk. DIP switches 1 and 2 can be used to configure the detector
to operate at one of four frequencies corresponding to
Low
,
Normal, Medium
,
and
High
as shown in the table below.
Switch
Frequency
Low (0) Normal (1) * Medium (2) High (3)
1
ON
OFF *
ON
OFF
2
ON
ON *
OFF
OFF
* Factory default setting.
Fail-Safe / Fail-Secure (DIP Switch 3)
When DIP switch 3 is in the OFF position, the detector operates in Fail-Safe
mode. If a loop fault occurs when operating in Fail-Safe mode the Detect
Output is “ON”.
When DIP switch 3 is in the ON position, the detector operates in Fail-Secure
mode. If a loop fault occurs when operating in Fail-Secure mode the Detect
Output is “OFF”.
NOTES:
Changing the setting of this DIP switch will reset the detector.
The factory default setting is OFF, Fail-Safe mode.
Sensitivity Boost (DIP Switch 4)
Sensitivity Boost is activated using DIP switch 4. When a vehicle is detected
sensitivity is automatically "boosted" to a higher level. The higher sensitivity
level remains until detection is dropped, at which time the sensitivity returns to
the no-detect level. This feature provides protection against dropping detection
when high bed vehicles pass over the loop.
NOTE:
The factory default setting is OFF, no Sensitivity Boost.
