Dual Channel 12-24VADC Loop Sensor High Precision And Stability
The LD-202 Dual Channel Loop Sensor delivers exceptional precision and stability for vehicle detection applications, featuring advanced direction recognition and robust protection systems.
Key Advantages
- Broad Sensing Range and High Sensitivity: Extensive sensing range from 15 to 2000μH with exceptional sensitivity for precise vehicle detection
- Automatic Reset Function: Autonomous reset capability in case of malfunction, enhancing system stability and reliability
- Direction Recognition Capability: Advanced direction recognition for accurate vehicle movement detection and relay output triggering
- 40000V Lightning Protection: Robust protection against lightning strikes for prolonged durability
- Wide Operating Environment Range: Operates from -40°C to +70°C for consistent performance in challenging conditions
Core Functionality
- Vehicle Detection: Inductive sensing technology detects vehicles without physical contact via inductance changes
- Direction Recognition: Identifies specific vehicle movement directions to trigger relay output for gate control
- Automatic Reset: Self-resetting capability ensures seamless operation and system reliability
- Relay Output: Provides output signals for gate opening, traffic light control, and vehicle counting
Applications
- Traffic Management Systems
- Gate Automation
- Parking Facilities
- Access Control
- Traffic Light Control
- Vehicle Counting
Connections
Indicator Lights and Switches
Power LED: RED power LED indicates "Power ON"
CH1 Detecting LED:
- Continuously On: Indicates vehicle detection
- Blinking slowly: Indicates loop is short circuit or insufficient twists after the loop
- Blinking fast: Indicates loop is open circuit or too many twists after the loop
CH2 Detecting LED:
- Continuously On: Indicates vehicle detection
- Blinking slowly: Indicates loop is short circuit or insufficient twists after the loop
- Blinking fast: Indicates loop is open circuit or too many twists after the loop
Sensitivity Selection
Sensitivity and frequency of the loop can be adjusted by 7-way dip switch and 10-way dip switch setting. Users can select 8 different settings by changing the dipswitch configuration.
Dip switch 6, 7 and 8 for CH1 sensitivity selection with 0.8 being the least sensitive and 0.015 being the most sensitive.
Dip switch 3, 4 and 5 for CH2 sensitivity selection with 0.8 being the least sensitive and 0.015 being the most sensitive.
Switch Configuration
Switch 1 (S1): Channel 1 Loop Function Selection (10 way dip switch)
DIP 1 & DIP 2: Special Sensitivity Increase For Both Trailer (Both Channels)
(S1) D3, D4, D5 and (S2) D1, D2: Setting Special Functions (Mode1, 2, 3 Direction Detection. Mode 4, 5, 6 Normal mode, two loop detection are separated)
(S1) D6 & D7 & D8 and (S2) D3 & D4 & D5: Setting CH1 and CH2 Sensitivity Selection (Eight Levels Choices)
(S1) D9 & D10 and (S2) D6, D7: Setting Frequency (20 K to 100 KHz)
Reset Button: The LD-200 requires resetting each time a setting change is made to the Dip switches.
Loop Installation
The loops should be sealed using a "quick-set" black epoxy compound or hot bitumen mastic to seamlessly blend with the roadway surface.
When installing, please keep the product plug and socket in the vertical direction.
System Integration
The JUTAI LD-200/202 Double Channel Vehicle Loop Detector series, equipped with direction recognition functionality, is ideal for numerous single-channel entry and exit scenarios. When integrated with the JUTAI One Door Controller (Model: AC-11), JUTAI Gate Barrier (Model: BR-110), and JUTAI Long-Range RFID Reader (Model: PUHF-9), combined with high-temperature-resistant loop coils (Model: JTHT-11), it forms an efficient solution for single-channel entry/exit access control systems.
Operational Principle
Entry Process:
- Upon vehicle entry, simultaneous activation of the two loop coils occurs
- The LD-202 triggers the UHF reader positioned at the entrance
- Upon reading the card ID, the UHF reader transmits the ID to the controller (AC-11) via Wiegand output
- The controller verifies the ID's validity and outputs a relay signal to open the gate barrier
- Once the vehicle enters, the barrier arm automatically lowers
- Safety and anti-smashing function is facilitated by the JUTAI Single Channel Loop Detector (LD-100/102)
Exit Process:
- As the vehicle exits, the LD-202 triggers the UHF reader
- The reader reads the card and sends the ID to the controller
- Upon validation of the ID, the controller emits a relay signal to open the gate barrier
- After the vehicle exits, the barrier arm lowers automatically
- Safety and anti-smashing function is facilitated by the JUTAI Single Channel Loop Detector (LD-100/102)
In both scenarios, the LD-202's Direction Recognition Function ensures accurate and efficient operation.
JUTAI LD-202 Double Channel Loop Detector can function as two independent single-channel loop detectors, offering versatility and cost-efficiency. This configuration is ideal for standard one-in and one-out parking lots, where a single barrier and long-range reader are installed at both the entrance and exit.
