Inductive Proximity Switch SN04N SN04P SN04Y NPN DC 3-wire Buried TypeItem NO.: SN04N

Inductive Proximity Switch

Product Description:

The line length is about one meter, and there is an error in manual measurement

【Brand】: OMKQN

【Model】: SN04-P

【Product Name】: Corner Pillar Universal Proximity Switch

【Appearance】: 18 * 18 * 36mm

【Detection distance】: 4 millimeters (mm)

【Detected object】: Metal/Iron

【Working voltage】: within 6-36VDC DC

【Output method】: DC three wire NPN normally open, NPN NO

【Output current】: 300 milliamperes (mA)

【Shell Material】: Plastic

【Functional use】: The function of proximity switches (also known as contactless travel switches) is to act when approaching metal, and are widely used for control of machine tools and other equipment.

Working principle:

The proximity switch consists of three main parts: oscillator, switch circuit, and amplifier output circuit. The oscillator generates an alternating magnetic field. When the metal target approaches this magnetic field and reaches the sensing distance, eddy currents are generated within the metal target, leading to oscillation attenuation and even stopping. The oscillation and stop changes of the oscillator are processed by the subsequent amplification circuit and converted into switch signals, triggering the driving control device to achieve non-contact detection purposes. The closer the target is to the sensor, the greater the damping inside the coil; The greater the damping, the smaller the current of the sensor oscillator. The current loss of the inductive proximity switch decreases as the distance from the metal target decreases.

The difference between Normally Open (NO) and Normally Closed (NC):

1、 Normally open (NO) refers to the signal output line being disconnected in normal state, with no signal output. It only closes when an object is sensed and outputs a signal.

2、 Normally closed (NC) refers to the signal output line being in a closed state under normal conditions, with continuous signal output. It only opens and closes the signal when an object is sensed.