LJ18A3-5-Z/BY 平頭屏蔽式接近開關產品介紹（中英雙語）
一、產品概述
LJ18A3-5-Z/BY是一款采用PNP輸出方式的直流三線制常開型接近開關，主體采用M18圓柱形不銹鋼外殼設計，平頭屏蔽式感應端結構可實現緊湊空間內的穩定檢測。該產品適用于工業自動化領域中對金屬物體的非接觸式位置檢測，具備良好的環境適應性和抗干擾能力。
二、結構特性
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機械設計
外殼采用304不銹鋼材質，表面精密拋光處理，防護等級達到IP67。平頭式感應端配合屏蔽結構設計，可有效減少相鄰傳感器間的相互干擾，特別適用于高密度安裝場景。緊湊的M18直徑（18mm）與60mm長度尺寸便于設備集成，標配2米PVC電纜出線方式。
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電氣參數
工作電壓范圍：DC 10-30V ±10%
額定輸出電流：≤200mA
空載電流損耗：＜10mA
響應頻率：500Hz
檢測距離：5mm（對標準鐵材質）
溫度適用范圍：-25℃至+70℃
三、工作原理
基于電磁感應原理，當金屬物體進入預設感應范圍時，內部振蕩電路參數變化觸發信號輸出。PNP型三線制接線方式（棕+24V，藍0V，黑信號線）輸出高電平信號，符合主流PLC系統輸入要求。常開型設計確保無目標物時觸點保持斷開狀態，符合安全控制邏輯。
四、應用領域
• 自動化產線：定位機械臂末端動作、檢測工件到位
• 設備安全：機床刀具位置監控、防護門狀態檢測
• 物流系統：分揀機包裹計數、堆垛高度控制
• 工程機械：液壓缸行程限位、部件姿態檢測
• 汽車制造：焊接機器人焊槍定位、裝配夾具到位確認
五、安裝與維護
推薦安裝時保持感應面與檢測物體軸向對齊，允許±10%的徑向偏差。建議預留1.5倍標稱距離的安全余量以適應溫度波動影響。定期清潔感應面金屬碎屑，避免強腐蝕性介質直接接觸。產品使用壽命可達1000萬次機械操作。
LJ18A3-5-Z/BY Flat Shielded Proximity Sensor Introduction
I. Product Overview
The LJ18A3-5-Z/BY is a DC 3-wire normally open proximity sensor with PNP output configuration. Featuring an M18 cylindrical stainless steel housing and flat shielded sensing face, this device provides reliable metal object detection in confined spaces. Its optimized design ensures stable performance in various industrial automation applications requiring non-contact position sensing.
II. Technical Features
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Mechanical Construction
Constructed with 304 stainless steel housing (IP67 rated), the sensor incorporates a flush-mounted shielded design that minimizes mutual interference in clustered installations. The compact dimensions (Ø18mm×60mm body) with 2-meter PVC cable output enable flexible integration into machinery. Polished surface treatment enhances corrosion resistance.
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Electrical Specifications
Operating Voltage: DC 10-30V ±10%
Output Current: ≤200mA
No-load Current: <10mA
Switching Frequency: 500Hz
Sensing Distance: 5mm (for mild steel)
Operating Temperature: -25℃ to +70℃
III. Operational Principle
Utilizing electromagnetic induction technology, the sensor detects metallic targets through oscillator amplitude variation. The PNP configuration (brown:+24V, blue:0V, black:signal) delivers high-level output upon target presence, compatible with most PLC input modules. Normally open contact design ensures circuit disconnection in standby state, maintaining fail-safe operation.
IV. Application Scenarios
• Production Automation: End effector positioning, workpiece presence verification
• Machine Safety: Tool position monitoring, safety door status detection
• Material Handling: Package counting in sorting systems, palletizing height control
• Heavy Equipment: Hydraulic cylinder stroke limitation, component orientation check
• Automotive Manufacturing: Welding gun alignment, fixture engagement confirmation
V. Installation Guidance
Maintain axial alignment between sensing face and target surface, allowing ±10% radial deviation. Recommend maintaining 1.5× nominal sensing distance as safety margin. Periodic cleaning of sensing surface is advised to remove metallic debris. Avoid prolonged exposure to strong corrosive substances. Mechanical durability exceeds 10 million operations.
（總字數：中文418字，英文379字）
