LD-200 Vehicle Direction Loop Detector with Dual Independent Channels for

The LD-200 is specifically designed for parking entrances and exits requiring vehicle direction detection. Its two independent loop channels can be positioned sequentially in the lane, enabling the detector to compare CH1 and CH2 activation sequences and generate direction-specific relay responses.

A CH1-first sequence indicates one direction, while a CH2-first sequence indicates the reverse. This directional information can be communicated to compatible parking controllers for entry/exit logic, vehicle-flow processing, or barrier operation. The detector complements parking controllers by supplying essential loop and relay information.

Direction detection is optional. When projects require two separate vehicle-presence zones, the channels can operate independently. This flexibility allows installers to use one channel for an approach loop and the second for passage, safety, or secondary detection points.

Six selectable modes include dedicated directional behaviors, separate presence operation, and pulse operation. By configuring the appropriate DIP-switch combinations, output logic can be matched to specific entrance or exit sequence requirements.

Each channel features eight sensitivity levels (0.015% to 0.8%) and four frequency settings across approximately 20-100kHz. Frequency separation helps when loops in neighboring lanes are close enough to influence each other. The detector also supports trailer sensitivity enhancement, automatic reset, and permanent presence operation.

• Parking entrance direction control
• Parking exit direction control
• Bidirectional vehicle lanes
• Access-controlled commercial sites
• Residential gate systems
• Industrial entry and exit roadways

For direction recognition, install the two loops sequentially along the vehicle path. The manual recommends approximately 1m separation between CH1 and CH2. Proper loop geometry, appropriate sensitivity, and frequency selection are crucial for stable sequencing.

• Power LED (RED): Illuminates to indicate "Power ON"
• CH1 Detection LED:
  • Steady On: Vehicle detection
  • Slow Blinking: Loop short circuit or insufficient twists
  • Fast Blinking: Loop open circuit or excessive twists
• CH2 Detection LED:
  • Steady On: Vehicle detection
  • Slow Blinking: Loop short circuit or insufficient twists
  • Fast Blinking: Loop open circuit or excessive twists

Sensitivity and frequency adjustment is facilitated through 7-way and 10-way dip switch settings:

• 8 different sensitivity settings available via dip switch configuration
• Dip switches 6, 7, and 8 govern CH1 sensitivity (0.8 to 0.015)
• Dip switches 3, 4, and 5 control CH2 sensitivity (0.8 to 0.015)

Switch 1 (S1) - Channel 1 Loop Function Selection:

• DIP 1 & DIP 2: Special Sensitivity Increase For Both Trailer (Both Channels)
• D3, D4, D5 and Switch 2 D1, D2: Special Functions (Mode1, 2, 3 Direction Detection. Mode 4, 5, 6 Normal mode)
• D6 & D7 & D8 and Switch 2 D3 & D4 & D5: CH1 and CH2 Sensitivity Selection (Eight Levels)
• D9 & D10 and Switch2 D6, D7: Frequency Selection (20 K to 100 KHz)

• Coil cutting size should be rectangle: length 1.0 to 2.0 meters, width 0.8 to 1.2 meters
• Avoid right angles at corners as much as possible
• Use ferromagnetic wires for induction coil, total length up to 500 meters
• Keep product plug and socket in vertical direction during installation

The JUTAI LD200/202 double-channel vehicle loop detector series, equipped with direction recognition function, is ideal for single-channel entry and exit scenarios when integrated with:

• JUTAI One door controller (Model: AC-11)
• JUTAI gate barrier (Model: BR-110)
• JUTAI long-range RFID reader (Model: PUHF-9)
• High-temperature resistance loop coils (Model: JTHT-11)

Entry Process:

1. Car enters community/parking lot, pressing two loop coils simultaneously
2. LD-200/202 triggers UHF reader at entrance
3. UHF reader reads card ID and sends to controller via Wiegand output
4. Controller verifies ID validity and outputs relay signal to open gate barrier
5. Car enters, barrier arm lowers automatically
6. LD-100/102 provides safety and anti-smashing functionality

Exit Process:

1. Car exits community/parking lot, passing inside UHF reader
2. LD-200/LD-202 triggers UHF reader to read card and send ID to controller
3. Controller verifies ID validity and outputs relay signal to open gate barrier
4. Car exits, barrier arm lowers automatically
5. LD-100/102 provides safety and anti-smashing functionality

Direction Recognition: The Direction Recognition Function ensures the double channels loop detector does not trigger the signal again when the car passes another UHF reader, recording only entry or exit records in the system.

The JUTAI LD-200/202 Double Channel Loop Detector can also function as two independent single-channel loop detectors, suitable for standard one-in and one-out parking lots. This configuration provides cost-saving benefits by reducing hardware costs associated with using separate detectors for each function.