Description

Escalator sensor switch DAA26220BJ17/19/21/26/28/29/30/31 Brief Introduction

Product Name	Escalator sensor switch
Model Number	DAA26220BJ1 DAA26220BJ3 DAA26220BJ4 DAA26220BJ7 DAA26220BJ8 DAA26220BJ10 DAA26220BJ11 DAA26220BJ12 DAA26220BJ13 DAA26220BJ16 DAA26220BJ19 DAA26220BJ21 DAA26220BJ26 DAA26220BJ28 DAA26220BJ29 DAA26220BJ30 DAA26220BJ31
Quality	Original.Brand New
Payment	T/T. Paypal. Western Union
Delivery	3-5 Working Days
Packaging	Packed by carton

31: Precision Detection Core from Nanjing Zhuye Elevatorparts

The Escalator Sensor Switch DAA26220BJ series (including models BJ17, BJ19, BJ21, BJ26, BJ28, BJ29, BJ30, BJ31) is a critical precision detection component for escalator systems, specifically designed to monitor key operating states of escalators—such as step presence, handrail speed synchronization, and safety barrier integrity. As the “sensory nerve” of escalators, these sensor switches transmit real-time detection signals to the main control system, ensuring the escalator operates only under safe conditions and triggering immediate protective measures when abnormalities occur. The Escalator Sensor Switch DAA26220BJ17/19/21/26/28/29/30/31, exclusively supplied by Nanjing Zhuye Elevatorparts (a professional and trusted distributor of high-quality escalator components), fully complies with international escalator safety standards (EN 115-1, GB 16899) and is perfectly compatible with escalator models matching corresponding DAA26220BJ specifications. Featuring high detection accuracy, strong anti-interference ability, and stable performance across models, this series provides reliable safety guarantees for escalators in shopping malls, airports, subway stations, railway stations, and other high-traffic public places worldwide.

Nanjing Zhuye Elevatorparts adheres to the core philosophy of “safety first, quality-oriented” and implements strict unified quality control over the entire DAA26220BJ series. Each sensor switch undergoes a multi-stage pre-delivery inspection, including detection accuracy testing, anti-interference performance verification, electrical continuity detection, and environmental resistance trials. The series adopts advanced photoelectric or inductive detection technology (varies by model), a high-strength corrosion-resistant shell, and precision electronic components: the tailored detection technology ensures each model meets specific functional needs (e.g., step detection, handrail synchronization monitoring); the IP65-rated shell effectively resists dust, water splashes, and vibration in escalator environments; the high-stability components guarantee a response time ≤ 10ms, avoiding signal delay. All models feature standardized installation interfaces and dimension designs consistent with original specifications, enabling seamless replacement without modifying the original escalator control system.

Step-by-Step Usage Guide for Escalator Sensor Switch DAA26220BJ Series

To ensure the reliable operation of the escalator’s detection system and extend the service life of DAA26220BJ series sensor switches, follow the professional guidelines provided by Nanjing Zhuye Elevatorparts for installation, operation, and maintenance:

1. Professional Installation & Commissioning

Installation must be performed by certified technicians familiar with escalator control systems. Prior to installation, confirm the compatibility of the specific DAA26220BJ model (BJ17/BJ19/BJ21/BJ26/BJ28/BJ29/BJ30/BJ31) with the target escalator using the detailed compatibility manual provided by Nanjing Zhuye Elevatorparts. The steps are as follows:

Safety Preparation: Cut off the escalator’s main power supply and hang a “Maintenance in Progress—Do Not Power On” sign at the power switch. Locate the preset installation position (varies by model: step area, handrail side, or safety barrier) and clean the area to remove dust, oil stains, and debris that may affect detection accuracy.
Sensor Installation: Fix the DAA26220BJ sensor switch to the mounting bracket using high-strength screws provided by Nanjing Zhuye Elevatorparts. Ensure the sensor’s detection end is aligned with the target detection area (no obstruction) and installed horizontally/vertically as required (refer to model-specific instructions). Tighten the screws with a torque of 6–10 N·m to prevent loosening due to vibration, and reserve a 3–5cm gap around for heat dissipation.
Wiring & Calibration: Follow the escalator wiring diagram and Nanjing Zhuye’s technical guidance to connect the sensor’s power terminal (DC 12–24V) and signal terminal to the main control system. Ensure correct polarity, tight wiring, and use waterproof sleeves for outdoor or humid-area wiring. After wiring, calibrate the detection parameters: adjust the sensor’s sensitivity (via built-in potentiometer) to ensure accurate detection of normal/abnormal states (e.g., step presence/absence, handrail speed synchronization). For photoelectric models, confirm the detection distance is within the standard range (5–50mm).
Post-Installation Testing: Restore the power supply and conduct comprehensive functional tests. Simulate normal and abnormal operating scenarios (e.g., placing/removing objects in the detection area, adjusting handrail speed) to verify the sensor’s response accuracy and signal transmission stability. Check if the control system executes correct protective measures (e.g., stopping the escalator) when abnormalities are detected. If there is false triggering or delayed response, recheck the installation position and calibration parameters immediately.

2. Daily Operation & Routine Inspection

Regular inspections are crucial to early detection of sensor faults and ensuring the escalator’s safety. Maintenance personnel should incorporate the following checks into their daily patrols:

Daily Visual Inspection: Check the external state of the DAA26220BJ sensor (all installed models). Ensure the shell is free of cracks, deformation, or corrosion; the detection end is clean (wipe with a dry cloth if dusty); and wiring terminals are tight with no loose wires.
Weekly Functional Check: Operate the escalator in maintenance mode and test each sensor’s function. For step-detection models, check if the system alarms when steps are missing; for handrail-sync models, verify immediate alerts when handrail speed deviates. Use a multimeter to detect signal output (normal state: on/off as specified) and confirm indicator lights work correctly (green for normal, red for alarm).
Monthly Parameter Monitoring: Detect the sensor’s input voltage (ensure it is within 12–24V DC) and contact resistance (normal value ≤ 50mΩ). For photoelectric models, check if the detection distance deviates (re-calibrate if needed); for inductive models, inspect the detection coil for damage.

3. Regular Maintenance Schedule

Systematic maintenance can effectively extend the service life of DAA26220BJ series sensors. Follow Nanjing Zhuye Elevatorparts’ recommended maintenance plan:

Quarterly Maintenance: Disconnect the power supply, remove the sensor, and clean the shell and detection end with a professional cleaner (provided by Nanjing Zhuye Elevatorparts) to remove oil stains and oxidation. Reinstall and retighten the sensor, then re-calibrate the detection parameters to ensure accuracy.
Semi-Annual Performance Test: Conduct a comprehensive performance test, including detection accuracy, response time, and anti-interference ability. Use a professional sensor tester to verify response time (≤ 10ms) and sensitivity. For sensors in harsh environments (high dust, humidity), increase the test frequency and apply anti-rust oil to the mounting screws.
Annual Professional Overhaul: Arrange a professional inspection with Nanjing Zhuye Elevatorparts’ certified technical team. Replace aging or worn sensors with genuine DAA26220BJ models. Inspect the main control system’s signal receiving module to ensure compatibility with the sensor series, and conduct full-range system calibration.

Recommended Replacement Cycle for Escalator Sensor Switch DAA26220BJ Series

As core detection components bearing long-term environmental erosion and mechanical wear, DAA26220BJ series sensors have a specified service life. Timely replacement is critical to avoiding detection failure, which may lead to escalator operation under unsafe conditions and cause serious accidents.

1. Standard Replacement Cycle

Under normal operating conditions (escalator daily operation time 12–24 hours, environment temperature -10–60℃, humidity 30%–95%, no severe dust or corrosion), the recommended replacement cycle for DAA26220BJ17/19/21/26/28/29/30/31 sensor switches is 4–6 years. This cycle is determined based on Nanjing Zhuye Elevatorparts’ long-term field data, including component aging tests, performance degradation analysis, and actual operation feedback.

2. Adjustments for Special Scenarios

Harsh Environments: For escalators in high-humidity coastal areas (salt spray corrosion), high-dust construction site supporting malls, or subway stations with strong electromagnetic interference, the replacement cycle should be shortened to 3–4 years. Harsh conditions accelerate shell corrosion, component aging, and signal attenuation, reducing reliability.
Low-Frequency Use Scenarios: For escalators with low usage frequency (e.g., small office buildings, villa lobbies with daily operation time < 8 hours) and clean, stable environments, the replacement cycle can be extended to 6–7 years—only if Nanjing Zhuye’s professional inspection confirms detection accuracy, response speed, and circuit integrity are intact.

3. Immediate Replacement Conditions

Replace the DAA26220BJ sensor switch immediately if any of the following issues occur, regardless of service life:

Frequent false triggering or failure to detect abnormalities, and the fault cannot be eliminated through maintenance and calibration.
The sensor’s response time exceeds 20ms (confirmed by professional testing), leading to delayed protective measures.
The shell is severely cracked or damaged, exposing internal circuits; or the internal circuit is short-circuited/broken.
The detection accuracy deviates by more than 10% from the standard value, and re-calibration fails to restore normal performance.

In conclusion, the Escalator Sensor Switch DAA26220BJ17/19/21/26/28/29/30/31 supplied by Nanjing Zhuye Elevatorparts is a high-quality, model-compatible detection component tailored for escalator systems. By following the correct usage methods, maintenance schedules, and replacement cycles, escalator maintenance teams can effectively ensure the stable operation of the escalator’s detection system, maximize passenger safety, and minimize accident risks. Choosing Nanjing Zhuye Elevatorparts means you get not only authentic DAA26220BJ series sensors but also professional technical support, including model selection guidance, installation advice, and prompt after-sales service.

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