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GTO LOOPDT1 Reference Manual

Digital loop detector
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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

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Summary of Contents for GTO LOOPDT1

  • Page 1 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...
  • Page 2 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.

  • Page 3: Led Indicators

    2) LED INDICATORS: 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.

  • Page 4: Loop Installation Guidelines

    Loop Installation Guidelines The typical sensing height is 2/3 of the shortest leg of a loop (in feet). Therefore a 4’ x 8’ loop typically has a detection range of 2.6’. The inductance of a conventional four-sided loop can be estimated using the formula: L = P x (T + T) / 4 Therefore a 4’...
  • Page 5 4. When the outline of the loop and the lead-in has been marked the pavement can be cut. The saw cut should be approximately 2.0 inches deep and 0.25 inches wide. All 90 degree corners should be chamfered so that the course of the loop wire does not change direction sharply but rather at shallow angles of 45 degrees or less.
  • Page 6 Wiring the Loop Detector to GTO Systems Always make sure the power switch to the operator is turned off before connecting accessory device wiring to the terminal blocks. Unplugging the transformer does not turn power to the operator OFF. Wiring the detector as a Shadow Loop PRO-SW3000 &...
  • Page 7 Wiring the detector as a Free Exit Loop PRO-SW3000 & PRO-SW4000 STALL FORCE RECEIVER Wires from relay output on detector Connect one of the relay output wires from the detector to the COMMON (COM) terminal and the other to the EXIT OPEN terminal.

  • Page 8: Limited One Year Warranty

    fire, flood, insects or other natural agent. After the one (1) year warranty period, GTO, Inc. will make any necessary repairs for a nominal fee. Call GTO at (800) 543-1236 for more information.

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