Active Member
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[China]
Address: No. 328, Jinyang Road, Chaoyang Village, Liushi Town, Yueqing City, Zhejiang Province, China
Contact name:Carrie Zhou
Zhejiang Zhongde Electric Co., Ltd. |
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Square Normally Open Proximity Switch , NPN / PNP NO Sensor ABS Detection Surface
Description
Normally Open Proximity Switches are used for non-contact detection of metallic objects. Their operating principle is based on a coil and oscillator that creates an electromagnetic field in the close surroundings of the sensing surface.
Two-wire NPN/PNP normally open AC
Parameter
| Lag distance | Less than 10% of the detection distance |
| Detecting objects | Magnetic metal (detection distance is reduced when non-magnetic metal) |
| voltage | DC : DC 12~24 (6~36V) pulse (p-p) below 10% |
| AC : AC 110~220V (36~250V) 50/60Hz | |
| Current consumption | N.P : ≤13mA |
| D : ≤0.8mA | |
| A : ≤1.7mA | |
| Control output | N.P : ≤300mA |
| D : ≤200mA | |
| A : ≤400mA | |
| Loop protection | N.P.D : reverse connection protection, surge absorption, load short circuit protection |
| A : surge absorption | |
| Ambient temperature | -30~+65°C (no icing, no condensation) |
| Ambient humidity | -35~95%RH |
| Insulation resistance | 50MΩ or more (DC500 megohmmeter) (between charging part and housing) |
| Withstand voltage | AC 1000V 50/60HZ 1min (between charging part and Housing) |
| Temperature effect | -30~+65°C: detection distance error ±15% at +23°C |
| -25~+60°C: detection distance error ±10% at +23°C | |
| Voltage effect | 6-36V (90-250V) : ±15% of detection distance error |
| 10-30V (220V) : ±10% of detection distance error | |
| Protection level | IP67 (IEC) |
| Material | Housing: ABS |
| Detection surface: ABS |
Note:Please read the "Precautions" of the product manual before use.
Working Principle
Inductive proximity switches, also known as inductive proximity sensors, metal sensors. The switch contains high-frequency oscillation circuit, detection circuit, amplifier circuit, the solution circuit and the output circuit. When the power is supplied to the switch, the oscillator in the high frequency oscillation circuit generates an alternating electromagnetic field on the detection surface of the switch. When there is a metal close to the switch detection surface, the eddy current inside the metal absorbs the energy of the alternating electromagnetic field in the oscillator. The oscillator is weakened or stopped. Oscillator energy changes in the two states, the detection circuit is converted to a level signal, through the amplifier circuit to amplify the level signal after the trigger circuit to trigger the output transistor transistor circuit to produce a switch signal. Thereby detecting the presence or absence of the metal. To achieve the purpose of metal detection.
