GTO PRO LOOP DETECTOR User Manual
Digital Loop Detector
GTO, Inc. • 3121 Hartsfield Road • Tallahassee, Florida 32303
1-800-543-GATE (4283) • www.gtoinc.com
Technical Support (800) 543-1236
RWLOPPRO
rev-4/5/06
GTO/PRO Loop Detector Settings and Layout
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
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
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.
2) LED INDICATORS:
Relay output:
Normally Open
Relay output:
Common
Relay output:
Normally Close
Po
wer supply input:
8-26 Vac/dc
Loop: wire use for loop
should be continuous with
no splice. Wire pair leaving
the loop should be twisted.
DIP SWITCHS
DIP 1: PRESENCE TIMER
DIP 2: SAFE/SECURE
DIP 3: ENTER/LEAVE
DIP 4: CONT/PULSE
DIP 5: INST/DELAY
DIP 6: SENS 0
DIP 7: SENS 1
DIP 8: SENS 2
DIP 9: FREQ 0
DIP 10: FREQ 1
LED LIGHTS
LED RED: POWER
LED GRN: DETECT
NO
COMNCV+V–LOOP
LOOP
TERMINALS
TB1-1: NO
TB1-2: COM
TB1-3: NC
TB1-4: Power in +
TB1-5: Power in –
TB1-6: LOOP
TB1-7: LOOP
a) RED LED: The red LED blinks when power is present.
b) GREEN LED: The green LED blinks when detection occurs.
NOTE: Both LEDs blink when fault is detected at the loop.
3) TERMINAL BLOCK (PLUGGABLE):
a) OUTPUT RELAY: Relay is ‘dry-contact’ output.
i) TB1-1: Normally open side of output relay.
ii) TB1-2: Common side of output relay.
iii) TB1-3: Normally closed side of output relay.
b) POWER SUPPLY INPUT:
i) TB1-4: 8-26 Vac/Vdc positive input.
ii) TB1-5: 8-26 Vac/Vdc negative input.
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