Description
Elevator photoelectric switch SL-73B Brief Introduction
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Product Name |
Elevator photoelectric switch |
| Model Number | SL-73B |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Elevator Photoelectric Switch SL-73B: Core Safety Component from Nanjing Zhuye Elevatorparts
The elevator photoelectric switch is a critical safety component in the elevator door system, responsible for detecting obstacles during door opening and closing to trigger immediate door reversal or stop. Its sensitivity and stability directly relate to passenger safety and elevator operational reliability. The Elevator Photoelectric Switch SL-73B, exclusively supplied by Nanjing Zhuye Elevatorparts, is meticulously designed for modern passenger and freight elevator door systems. Compliant with international standards such as IEC/EN 60947 and GB 7588, this photoelectric switch adopts infrared sensing technology, featuring fast response time (≤10ms), long sensing distance (adjustable 5-50cm), and strong anti-interference ability against ambient light. It boasts wide compatibility with mainstream elevator brands including Schindler, OTIS, KONE, and domestic well-known brands, widely used in residential buildings, commercial complexes, airports, and subway stations, providing reliable safety protection for elevator door operations.
Nanjing Zhuye Elevatorparts adheres to stringent quality control standards, and the Elevator Photoelectric Switch SL-73B is a testament to this commitment. Each switch undergoes rigorous pre-delivery testing, including sensitivity testing, response time verification, high-temperature (up to 85℃) and low-temperature (down to -25℃) resistance tests, and anti-electromagnetic interference tests. The switch features a fully sealed IP65 protection level housing, which can effectively resist dust, moisture, and oil contamination in the elevator hoistway, ensuring stable operation in harsh environments. The internal circuit adopts anti-surge and short-circuit protection designs to prevent damage caused by voltage fluctuations. The infrared emission and receiving components are sourced from international renowned brands, ensuring consistent performance and a service life of over 100,000 hours. Additionally, the switch is equipped with clear indicator lights (power and signal) for easy status monitoring and fault diagnosis.
Usage Guide for Elevator Photoelectric Switch SL-73B
Proper installation, debugging, and daily maintenance are vital to maximizing the service life and safety performance of the SL-73B photoelectric switch. Nanjing Zhuye Elevatorparts strongly recommends that only certified elevator maintenance technicians perform these operations to avoid safety hazards such as door reversal failure. Before installation, verify that the switch’s voltage (DC 12V/24V optional), sensing type, and installation dimensions are completely consistent with the elevator door system. For detailed installation steps and parameter setting standards, refer to the product manual provided by Nanjing Zhuye Elevatorparts or contact our technical support team for professional guidance.
1. Pre-Installation Preparation
First, cut off the elevator’s main power supply and the power supply of the door system, lock the switch, and place a “Maintenance in Progress” warning sign at the elevator entrance and machine room to prevent accidental startup. Wear anti-static gloves to avoid damaging internal electronic components. Prepare professional tools: screwdrivers, multimeters, wire strippers, level gauges, and cleaning cloths. Clean the installation position (usually on the elevator door sill or door leaf) to remove dust, debris, and oil stains—impurities that can affect sensing accuracy. Carefully inspect the SL-73B photoelectric switch for external damage (e.g., cracked housing, damaged lenses, or loose terminals) and use a multimeter to test the power terminal to ensure no short circuit or open circuit. Check the matching door controller to ensure it is free of faults that may affect the switch’s signal reception.
2. Installation & Wiring
Fix the SL-73B photoelectric switch on the mounting bracket with screws, ensuring the sensing lens is aligned with the door’s moving path and free of obstacles. Use a level gauge to check that the switch is installed horizontally to avoid sensing dead angles. According to the wiring diagram provided by Nanjing Zhuye Elevatorparts, connect the wires: brown wire to power positive (+), blue wire to power negative (-), and black wire to the door controller’s signal input terminal. The wire stripping length should be controlled at 6-8mm, and terminals should be tightened firmly to prevent poor contact. For unused wires, wrap the ends with insulating tape to avoid short circuits. Separate power wires and signal wires to reduce electromagnetic interference. After wiring, install the protective cover to prevent the lens from being scratched or contaminated. Finally, manually adjust the sensing distance via the “±” knob on the switch (refer to the manual for specific ranges).
MaintenancMaintenancMaintenancMaintenanc3. Daily Maintenance & Use
Replacement Cycle of Elevator Photoelectric Switch SL-73B
The replacement cycle of the SL-73B photoelectric switch depends on usage frequency, operating environment, and maintenance quality. Under normal conditions—12-24 hours of daily operation, clean and dry hoistway environment, and regular maintenance—Nanjing Zhuye Elevatorparts recommends a replacement cycle of 4-6 years. This cycle is based on field test data and GB/T31821—2015 standards, fully considering the main factors affecting performance, such as aging of infrared components, attenuation of sensing sensitivity, and degradation of the protective housing.
For elevators in high-traffic areas such as shopping malls, airports, and subway stations (daily door opening/closing over 3000 times) or harsh environments (high humidity, heavy dust, frequent temperature fluctuations), the replacement cycle should be shortened to 2-4 years. High-frequency operation accelerates component wear, and harsh environments easily cause housing corrosion and lens contamination. For elevators with low usage frequency (villas, small offices with daily operation time <8 hours), proper maintenance can extend the cycle to 6-8 years. However, Nanjing Zhuye Elevatorparts’ technicians should conduct semi-annual comprehensive inspections on switches over 5 years old, including testing response time and sensing accuracy.
Regardless of the service life, the SL-73B photoelectric switch should be replaced immediately if any of the following problems occur: failure to detect obstacles or frequent false triggers, leading to door reversal malfunctions; indicator lights are dim, flickering, or non-functional; housing is severely cracked or corroded, affecting protection performance; wiring terminals are loose or oxidized and cannot be repaired; the switch fails to pass the annual safety inspection. Note that when replacing, use genuine SL-73B switches from Nanjing Zhuye Elevatorparts—mixing different brands/models may cause incompatibility issues .
The Elevator Photoelectric Switch SL-73B from Nanjing Zhuye Elevatorparts combines high sensitivity, stability, and durability, making it an ideal choice for elevator maintenance and renovation. Backed by strict quality control, advanced infrared sensing technology, and comprehensive after-sales service, it has earned trust from maintenance firms and property managers worldwide. Adhering to proper usage, maintenance, and replacement guidelines minimizes door system safety hazards and enhances the overall operational reliability of the elevator. Nanjing Zhuye Elevatorparts provides 100% genuine SL-73B photoelectric switches, plus professional support including model matching, on-site installation guidance, and fault diagnosis. Choose Nanjing Zhuye Elevatorparts for reliable core components and attentive service tailored to your elevator safety needs.
