Dual Channel LD-202 Loop Sensor Detector 12-24VADC Direction Recognition for One-way Road
Product Name: JUTAI LD-202 Dual Channel Loop Detector 12-24VADC 15~2000μH for Barrier Gate Opening and Safety
Advantages:
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Extensive Sensing Range and High Sensitivity: The LD-202 sensor offers a broad sensing range from 15 to 2000μH coupled with exceptional sensitivity, ensuring precise detection of various vehicles for reliable performance.
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Automatic Reset Function: With its automatic reset function, the LD-202 sensor autonomously resets in case of malfunction, enhancing system stability and reliability without the need for manual intervention.
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Direction Recognition Capability: Featuring advanced direction recognition, the LD-202 sensor accurately identifies specific vehicle movement directions to trigger relay output, ensuring precise control over gate operations.
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40000V Lightning Protection: Equipped with robust 40000V lightning protection, the LD-202 sensor is effectively shielded against damage from lightning strikes, ensuring prolonged durability and reliability.
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Wide Operating Environment Range: Designed for versatile applications, the LD-202 sensor operates within a wide temperature range from -40°C to +70°C, ensuring consistent performance even in challenging weather conditions.
Functionality:
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Vehicle Detection: Utilizing inductive sensing technology, the LD-202 sensor accurately detects vehicles without physical contact, relying on changes in inductance within the loops caused by the vehicle's metal mass.
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Direction Recognition: Advanced direction recognition capabilities enable the LD-202 sensor to identify specific vehicle movement directions, facilitating precise control over gate operations.
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Automatic Reset: The LD-202 sensor incorporates an automatic reset function, ensuring seamless operation and system reliability by automatically resetting in case of malfunction.
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Relay Output: Providing relay output signals upon vehicle detection, the LD-202 sensor enables various actions such as gate opening, traffic light control, and vehicle counting.
Applications:
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Traffic Management Systems: Deployed in traffic control systems to detect vehicles at intersections, toll booths, and parking entrances/exits, facilitating efficient traffic flow management.
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Gate Automation: Integrated into gate control systems for automatic opening and closing of gates in residential, commercial, and industrial environments, enhancing security and convenience.
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Parking Facilities: Utilized in parking lots and garages to manage vehicle entry and exit, monitor parking occupancy, and enforce parking regulations, optimizing parking space utilization.
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Access Control: Employed in access control systems to authorize vehicle entry at secured locations such as gated communities, industrial facilities, and military installations, ensuring controlled access and security.
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Traffic Light Control: Used to trigger traffic light changes based on vehicle presence and direction, optimizing traffic flow and minimizing congestion at intersections and roadways.
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Vehicle Counting: Applied in vehicle counting applications for traffic studies, parking occupancy monitoring, and retail traffic analysis, providing valuable insights for traffic management and business operations.
Connections
Indicates And Switch
Power Led: RED power LED indicates "Power ON"
CH1 Detecting Led: Continuously On: Indicates vehicle detection.
Blinking slowly: Indicates loop is short circuit or the number of twists after the loop is not enough.
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 the number of twists after the loop is not enough.
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.
User can select 8 different setting by changing the setting of the dipswitch to different modes as in the dipswitch setting tables below. 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.
3. Switch 1=S1 : Channel 1 Loop Function Selection (10 way dip switch)
(1)(Switch 1) DIP 1 & DIP 2 Special Sensitivity Increase For Both Trailer (Both Channels).
(2)(Switch 1=S1) D3, D4, D5 and (Switch 2=S2) D1, D2 Setting Special Functions (Mode1, 2, 3 Direction Detection. Mode 4, 5, 6 Normal mode, two loop detection are separated)
(3)(Switch 1=S1) D6 & D7 & D8 and (Switch 2=S2) D3 & D4 & D5 Setting CH1 and CH2 Sensitivity Selection (Eight Levels Choices).
(4)(Switch 1=S1) D9 & D10 and (Switch2=S2) D6, D7 Setting Frequency (20 K to 100 KHz).
Reset Button: It's important to note that 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 installation, please keep the product plug and socket in the vertical direction
Application:
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.
The operational principle is as follows:
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Entry Process:
- Upon a vehicle's entry into the community or parking lot, simultaneous activation of the two loop coils occurs.
- The JUTAI Double Channel Loop Detector (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 community or parking lot, the barrier arm automatically lowers.
- The safety and anti-smashing function is facilitated by the JUTAI Single Channel Loop Detector (LD-100/102).
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Exit Process:
- As the vehicle exits the community or parking lot and passes the internal UHF reader, 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 community or parking lot, the barrier arm lowers automatically.
- The 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. One loop coil is dedicated to triggering the reader and reading the card, while the other loop coil is utilized for the barrier's anti-smashing function. Enabling the Independent Working Mode function of the LD-202 streamlines operations and reduces hardware costs, making it a practical choice for various applications. 
