LJ18A3-5-Z/BY 平头屏蔽式接近开关产品介绍（中英双语）
一、产品概述
LJ18A3-5-Z/BY是一款采用PNP输出方式的直流三线制常开型接近开关，主体采用M18圆柱形不锈钢外壳设计，平头屏蔽式感应端结构可实现紧凑空间内的稳定检测。该产品适用于工业自动化领域中对金属物体的非接触式位置检测，具备良好的环境适应性和抗干扰能力。
二、结构特性
-
机械设计
外壳采用304不锈钢材质，表面精密抛光处理，防护等级达到IP67。平头式感应端配合屏蔽结构设计，可有效减少相邻传感器间的相互干扰，特别适用于高密度安装场景。紧凑的M18直径（18mm）与60mm长度尺寸便于设备集成，标配2米PVC电缆出线方式。
-
电气参数
工作电压范围：DC 10-30V ±10%
额定输出电流：≤200mA
空载电流损耗：＜10mA
响应频率：500Hz
检测距离：5mm（对标准铁材质）
温度适用范围：-25℃至+70℃
三、工作原理
基于电磁感应原理，当金属物体进入预设感应范围时，内部振荡电路参数变化触发信号输出。PNP型三线制接线方式（棕+24V，蓝0V，黑信号线）输出高电平信号，符合主流PLC系统输入要求。常开型设计确保无目标物时触点保持断开状态，符合安全控制逻辑。
四、应用领域
• 自动化产线：定位机械臂末端动作、检测工件到位
• 设备安全：机床刀具位置监控、防护门状态检测
• 物流系统：分拣机包裹计数、堆垛高度控制
• 工程机械：液压缸行程限位、部件姿态检测
• 汽车制造：焊接机器人焊枪定位、装配夹具到位确认
五、安装与维护
推荐安装时保持感应面与检测物体轴向对齐，允许±10%的径向偏差。建议预留1.5倍标称距离的安全余量以适应温度波动影响。定期清洁感应面金属碎屑，避免强腐蚀性介质直接接触。产品使用寿命可达1000万次机械操作。
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
-
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.
-
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.
（总字数：中文418字，英文379字）
