Namur proximity switches have been developed in China for more than 20 years. The technology is mature, the quality is very good, the workmanship is exquisite and durable, the price is reasonable, and the brand has a high reputation. The performance is quite good and it is more convenient, because Festo proximity switch is a position switch that can be operated without direct mechanical contact with moving parts.
About NAMURNAMUR signal is the most widely used intrinsically safe digital input and frequency input standard signal in the world. It was originally a German standard (DIN19234). Later became the European standard (EN50227, DINEN60947 -5-6). The NAMUR signal is a passive 2-wire system, nominal 8VDC power supply, 1mA and 3mA switching signals.
NAMUR sensors are intrinsically safe explosion-proof instruments, usually used in conjunction with isolated safety barriers. The isolation barrier provides 8VDC power to the sensor and detects its current signal. The detection point is usually ≤1.2mA and ≥2.1mA. The isolation barrier converts this switching signal into a relay signal, which is an active or passive 0-24V transistor switching signal.
The principle of the namur proximity switch is that the mechanical moving parts do not directly contact, and can switch the position. When the object is close to the surface of the sensor switch for a certain distance, it does not require mechanical contact or any pressure to make the switch act, thereby driving a direct current or Provide control instructions to the computer (PLC) device. Proximity switch is a kind of switch type sensor (namely non-contact switch), it has the characteristics of travel switch, but also has the performance of sensor, stable and reliable performance, fast frequency response, long service life, strong anti-interference ability, etc., and it is waterproof , Anti-corrosion and anti-vibration features.
1. NAMUR signal is the most widely used intrinsically safe digital input and frequency input standard signal in the world. It was originally a German standard (DIN19234). Later became the European standard (EN50227, DINEN60947-5-6). NAMUR signal is passive 2-wire
System nominal 8VDC power supply, 1mA and 3mA switching signals. 2. NAMUR sensors are all intrinsically safe explosion-proof instruments and are usually equipped with isolated safety barriers.
Use together. The isolation barrier provides 8VDC power to the sensor and detects its current signal. The detection point is usually ≤1.2mA and ≥2.1mA. The isolation barrier converts this switching signal into a relay signal, which is an active or passive 0-24V transistor switching signal.
The namur intrinsically safe proximity switch is about 32 yuan each. It has the advantages of wide voltage range, high repeat positioning accuracy, fast frequency response, good anti-interference performance, convenient installation and debugging, and long service life.
Related Links: Proximity Switch Working Principle Proximity Switch Model Meaning and Model Encyclopedia
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