1) DIP SWITCH SETTING:
a) DIP 1: PRESENSE TIMER
OFF (Factory default): The loop will automatically re-tune if an object is present for more than 1
hour.
ON: Automatic retune as described above is disabled.
b) DIP 2: SAFE/SECURE
OFF: Fail-safe mode. When the controller detects a fault (shorted or open loop) the output relay
is activated. Typically, the normally open output relay is connected to the ‘FREE EXIT’ input on
the gate’s controller that would hold the gate open.
ON: Fail-secure mode. When the controller detects a fault (shorted or open loop) the output
relay is NOT activated.
c) DIP 3: ENTER/LEAVE
OFF: The output relay is activated when a vehicle enters the loop.
ON: The output relay is activated when a vehicle is leaves the loop.
d) DIP 4: CONTINUOUS/PULSE
OFF: Continuously activates the output relay when a vehicle is detected.
ON: Momentarily activate the output relay when a vehicle is detected.
e) DIP 5: INSTANT/DELAY
OFF: Instantly activate the output relay when a vehicle is detected.
ON: Delay for 2 seconds before activating the output relay when a vehicle is detected. If the
vehicle is moved in less than 2 seconds relay will not be activated.
f) DIP 6,7,8: SENSITIVITY
g) DIP 9,10: FREQUENCY SELECT
These two switches provide four selectable loop frequencies. This allows multiple loops of the same
design to co-exist in close proximity without interference with each other. The actual frequency is
dependent on the loop inductance.
DIP 6
DIP 7
DIP 8
Inductance
Vehicle
change
size
OFF
OFF
OFF
2%
Larger
OFF
OFF
ON
1%
OFF
ON
OFF
.5%
OFF
ON
ON
.25%
ON
OFF
OFF
.125%
ON
OFF
ON
.06%
ON
ON
OFF
.04%
ON
ON
ON
.02%
Smaller
GTO/PRO Loop Detector Settings and Layout