Precision Inductive Proximity Switch ZHS40-4-N-03K User and Maintenance Manual

1、 Product Overview

The precision inductive proximity switch ZHS40-4-N-03K is an automated switch device manufactured based on the principle of eddy current effect. It is widely used in the field of industrial automation, such as machine tools, metallurgy, chemical industry, textile and printing industries, to detect the proximity or distance of metal objects and achieve automation control.

2、 Working principle

The proximity switch consists of a high-frequency oscillator, a detection amplifier, a comparator, and a driving circuit. The oscillator adopts a precision stable amplitude integrated circuit, and the alternating magnetic field generated forms eddy currents when approaching the surface of a metal object. Eddy current reacts on the proximity switch, causing the amplitude of the oscillator to decrease as the measured metal object approaches. After detection and amplification, a binary switch signal is generated by comparing it with the set action distance value, which is output by the driving circuit and plays a control role of "on" and "off".

3、 Technical specifications

Detection distance: 4mm.
Working voltage: 10-30V DC, ripple voltage ≤ 10%.
Output current: ≤ 200mA.
No load current: ≤ 10mA.
Switching frequency: 500Hz.
Delay: 5% -15%.
Repetition accuracy: ≤ 2%.
Temperature drift: ≤ 10%.
Protection level: IP67。
Working environment temperature:- 25 ℃~+75 ℃.

4、 Usage method

（1） Installation

Choose the appropriate location: Based on the actual application requirements, select the installation position of the proximity switch to ensure that it can accurately detect the target metal object.
Installation method: It can be installed flush or non flush, depending on the application scenario and requirements.
Connecting cables: Use appropriate cables for connection to ensure reliable electrical connections.

（2） Debugging and operation

Power on inspection: After connecting the power supply, check whether the proximity switch is working properly by observing the indicator light or using testing equipment.
Set detection distance: Adjust the detection distance of the proximity switch as needed to ensure that it can accurately detect the target object.
Testing and validation: In practical applications, test and validate proximity switches to ensure their performance meets requirements.

5、 Maintenance points

（1） Regular inspection

Appearance inspection: Regularly check the housing of the proximity switch for dust, dirt, or other contaminants, clean the outside of the sensor to prevent contaminants from affecting the detection performance of the sensor.
Electrical connection inspection: Regularly check whether the wiring of the proximity switch is intact, without looseness, corrosion, or breakage, to ensure that all electrical connections are reliable.

（2） Fault diagnosis

Signal detection: Regularly test the output signal of the proximity switch to ensure that it can operate normally within the expected detection range. If the output signal is abnormal, further diagnosis or calibration may be required.
Environmental factor inspection: Ensure that the proximity switch operates within the manufacturer's recommended temperature and humidity range, avoiding adverse effects of extreme environmental conditions on its performance.

（3） Cleaning and maintenance

Cleaning the casing: Use a clean cloth or soft brush to clean the casing of the proximity switch, removing dust and dirt.
Check the sensing surface: Check if the sensing surface is worn or damaged, and replace it promptly if necessary.

6、 Precautions

Avoid overload: Ensure that the working voltage and current of the proximity switch are within its rated range to avoid damage caused by overload.
Correct installation: During installation, follow the manufacturer's instructions to ensure that the installation position and method of the proximity switch are correct.
Protective measures: When used in harsh environments, appropriate protective measures should be taken, such as waterproofing, dust prevention, etc., to extend the service life of the proximity switch.