Description

Elevator Leveling Sensor Switch XAA21751X1/3 Brief Introduction

Product Name	Elevator Leveling Sensor Switch
Model Number	XAA21751X1 XAA21751X3
Quality	Original.Brand New
Payment	T/T. Paypal. Western Union
Delivery	3-5 Working Days
Packaging	Packed by carton

Elevator Leveling Sensor Switch XAA21751X1/3: Precision Positioning Core from Nanjing Zhuye Elevatorparts

Elevator Leveling Sensor Switch XAA21751X1/3 is a critical positioning component for elevator systems, specifically engineered to detect the elevator car’s exact position relative to the landing sill and transmit real-time stop signals to the main control system. As the “precision navigator” of elevator leveling, this dual-model series (XAA21751X1 and XAA21751X3) ensures the car stops with ultra-high accuracy (leveling error ≤ 2mm), eliminating gaps between the car floor and landing floor to prevent passenger tripping risks. Exclusively supplied by Nanjing Zhuye Elevatorparts (a professional and trusted distributor of high-quality elevator components), the Elevator Leveling Sensor Switch XAA21751X1/3 fully complies with international elevator safety standards (EN 81-20, GB 7588) and is perfectly compatible with mainstream elevator brands and control system models. Boasting high trigger sensitivity, stable signal transmission, and strong anti-interference performance, this sensor switch series provides reliable operational guarantees for elevators in residential buildings, commercial complexes, office towers, hospitals, and other high-demand scenarios worldwide.

Nanjing Zhuye Elevatorparts adheres to the core philosophy of “safety first, quality-oriented” and implements rigorous quality control over the XAA21751X1/3 leveling sensor switch. Each unit undergoes multi-stage pre-delivery inspections, including trigger accuracy testing, signal stability verification, anti-interference performance detection, and environmental adaptability trials. The product adopts advanced photoelectric sensing technology, a high-strength ABS engineering plastic shell, and a 24VDC low-voltage power supply design: the photoelectric sensing module ensures a rapid response time ≤ 0.1ms and a stable detection distance of 5–10mm, realizing instant and accurate signal transmission; the ABS shell features IP65 dustproof and waterproof rating, effectively resisting humidity, dust, and vibration in the shaft environment; the 24VDC low-voltage design ensures safe operation and seamless compatibility with most elevator control systems. The standardized mounting structure and adjustable sensing angle of XAA21751X1/3 are tailored to match the dedicated mounting positions of compatible elevator cars, avoiding complex modifications and enabling quick installation.

Step-by-Step Usage Guide for Elevator Leveling Sensor Switch XAA21751X1/3

To ensure the reliable operation of the elevator’s leveling system and extend the service life of the XAA21751X1/3 sensor switch, follow the professional guidelines provided by Nanjing Zhuye Elevatorparts for installation, debugging, and maintenance:

1. Professional Installation & Calibration

Installation must be performed by certified elevator technicians familiar with elevator control systems. Prior to installation, confirm the compatibility of the sensor switch model (XAA21751X1/3) with the target elevator’s car structure and control system using the detailed compatibility manual provided by Nanjing Zhuye Elevatorparts. The steps are as follows:

Safety Preparation: Cut off the elevator’s main power supply and fix the elevator car to a safe position aligned with the landing floor using a safety clamp. Locate the sensor mounting position (usually on the upper or lower part of the car frame, corresponding to the leveling induction plate in the shaft) and thoroughly clean the installation area to remove dust, oil stains, and debris that may affect sensing accuracy.
Sensor Installation: Fix the XAA21751X1/3 sensor switch to the dedicated mounting bracket using high-strength bolts provided by Nanjing Zhuye Elevatorparts. Adjust the sensor’s angle and height to ensure the sensing surface is perpendicular to the leveling induction plate in the shaft, and the detection distance is maintained at 5–10mm (consistent with Nanjing Zhuye’s technical parameters). Connect the sensor’s power terminal (24VDC) and signal terminal to the elevator main control system according to the wiring diagram, ensuring correct polarity and tight connections to avoid poor contact.
Leveling Accuracy Calibration: After wiring, restore the power supply and switch the elevator to inspection mode. Operate the car to move up and down slowly, and use a level gauge to check the leveling accuracy when the sensor switch sends a stop signal. If the leveling error exceeds 2mm, slightly adjust the sensor’s position until the error is within the standard range. Verify signal stability by continuously operating the car through multiple floors—ensure no false triggers or signal loss occur during movement.
Post-Installation Testing: Conduct comprehensive functional tests under various working conditions. Operate the elevator at normal speed to different floors to check leveling accuracy and signal response speed; simulate harsh shaft environments (e.g., dust accumulation, vibration) to verify the sensor’s anti-interference ability. Ensure the elevator stops stably and accurately at each floor, and the control system receives clear and reliable signals. If inaccurate leveling, signal instability, or no signal transmission occurs, recheck the installation and debugging immediately.

2. Daily Operation & Routine Inspection

Regular inspections are essential to early fault detection and ensuring the safety of the elevator leveling system. Maintenance personnel should integrate the following checks into their daily patrols:

Daily Visual Inspection: During shaft patrols, check the external condition of the XAA21751X1/3 sensor switch. Ensure the ABS shell is free of cracks, deformation, or damage; the wiring terminals are tight without looseness, corrosion, or oxidation; the sensing surface is clean and free of dust, oil stains, or scratches that may affect detection performance.
Weekly Functional Check: Operate the elevator to stop at each floor and observe the leveling effect (no obvious gap between the car floor and landing floor). Use a multimeter to detect the sensor’s input voltage (ensure it is 24VDC ± 10%) and output signal voltage, confirming stable signal transmission. Check the leveling induction plate in the shaft for deformation or displacement that may interfere with the sensor’s detection.
Monthly Parameter Monitoring: Turn off the power supply and clean the sensor’s shell and sensing surface with a dry, lint-free cloth to remove dust and debris. Use a professional distance meter to recheck the detection distance between the sensor and the induction plate (ensure it remains within 5–10mm). For elevators in harsh environments (high humidity, strong electromagnetic interference), check the sensor’s grounding status to enhance anti-interference capability.

3. Regular Maintenance Schedule

Systematic maintenance can effectively extend the service life of the XAA21751X1/3 leveling sensor switch. Follow Nanjing Zhuye Elevatorparts’ recommended maintenance plan:

Quarterly Maintenance: Disconnect the power supply, remove the sensor from the mounting bracket, and thoroughly clean the shell, sensing surface, and wiring terminals with a professional cleaner. Inspect the sensor’s cable for aging, cracking, or damage (replace the cable if necessary). Reinstall the sensor and reconfirm the detection distance and signal transmission stability.
Semi-Annual Performance Test: Conduct a comprehensive performance test, including trigger accuracy, signal response speed, and anti-interference ability. Use a professional sensor tester to simulate different detection distances and verify the accuracy of the output signal. For elevators in high-traffic areas (e.g., shopping malls, airports) or harsh environments (high humidity, heavy dust), increase the test frequency to ensure reliable performance.
Annual Professional Overhaul: Arrange a professional inspection with Nanjing Zhuye Elevatorparts’ certified technical team. Replace aging components (e.g., sensing modules, cables) with genuine parts to maintain original performance. Recalibrate the sensor’s positioning accuracy and signal parameters to meet the original factory standards and the elevator’s actual operating requirements.

Recommended Replacement Cycle for Elevator Leveling Sensor Switch XAA21751X1/3

As a core positioning component enduring long-term environmental erosion, mechanical vibration, and frequent signal transmission, the XAA21751X1/3 leveling sensor switch has a specified service life. Timely replacement is critical to avoiding failures such as reduced positioning accuracy, unstable signals, or no signal output, which may cause inaccurate elevator leveling, passenger tripping risks, or even elevator operation breakdowns.

1. Standard Replacement Cycle

Under normal operating conditions (elevator daily operation time 12–24 hours, daily leveling times ≥ 500, shaft environment temperature -20–60℃, humidity 10%–95%, no strong electromagnetic interference), the recommended replacement cycle for the XAA21751X1/3 leveling sensor switch is 3–5 years. This cycle is determined based on Nanjing Zhuye Elevatorparts’ long-term field data, including sensing module aging tests, signal stability analysis, and actual operation feedback.

2. Adjustments for Special Scenarios

Harsh Environments: For elevators in high-humidity coastal areas (salt spray corrosion), high-dust construction sites, or shafts with strong electromagnetic interference (near large electrical equipment), the replacement cycle should be shortened to 2–3 years. Harsh conditions accelerate the aging of the sensing module, corrosion of the shell and terminals, and reduce the sensor’s anti-interference ability and reliability.
Low-Frequency Use Scenarios: For elevators with low usage frequency (e.g., villa elevators, small office buildings with daily operation time < 8 hours) and clean, stable shaft environments, the replacement cycle can be extended to 5–6 years—only if Nanjing Zhuye’s professional inspection confirms the sensor’s positioning accuracy, signal stability, and component integrity are intact.

3. Immediate Replacement Conditions

Replace the XAA21751X1/3 leveling sensor switch immediately if any of the following issues occur, regardless of service life:

The leveling error exceeds 5mm, and the error cannot be corrected through calibration and maintenance, posing a clear tripping risk to passengers.
The sensor has frequent false triggers or signal loss, leading to abnormal elevator leveling (e.g., overshooting or undershooting the floor) or operation failure.
The sensor’s shell is severely cracked, deformed, or corroded; the sensing surface is damaged, resulting in inability to detect the leveling induction plate normally.
The sensor has no signal output (confirmed by multimeter testing), and the fault cannot be eliminated by checking the power supply and wiring, affecting the elevator’s normal operation.

In conclusion, the Elevator Leveling Sensor Switch XAA21751X1/3 supplied by Nanjing Zhuye Elevatorparts is a high-quality, high-precision positioning component tailored for elevator systems. By following the correct usage methods, maintenance schedules, and replacement cycles, elevator maintenance teams can effectively ensure the stable and accurate operation of the elevator’s leveling system, enhance passenger ride safety and comfort, and minimize failure risks. Choosing Nanjing Zhuye Elevatorparts means you get not only authentic XAA21751X1/3 sensor switches but also professional technical support, including model matching guidance, installation advice, and prompt after-sales service.

Products Categories