How is an inductive proximity switch applied

Inductive proximity switches need to be tested before use. Professional personnel will conduct structural testing on the main components of the switch. The main purpose is to determine whether the components of the switch are normal and whether they can work stably. In addition, the external protection of the switch is also required. Ability to consider, because in some environments, various external protective components may be installed to increase its service life, so how to apply the two-wire inductive proximity switch?

1. Wiring

Inductive proximity switches need to be wired correctly. If there are regulations, the cables used should be within the specified length. Most of the wiring is considered for noise prevention, but for safety reasons, it should be isolated from the power line and high-voltage line. The wiring of the power line and the photoelectric sensor should not be placed in the same wiring tube or wire slot, otherwise it will cause (sometimes) the misoperation or damage of the photoelectric switch due to induction, so in principle the inductive proximity switch should be separate Wiring.

2. Response time and sensitivity

According to the size and moving speed of the object to be measured, choose a photoelectric switch that has the ability to respond to the speed. In addition, regarding the through-beam type, since the thickness of the beam has an impact on the detection, the inductive proximity switch must be pre-calculated to shield the entire beam. time. Regarding the setting distance, there must be room when using the through-beam type in harsh environments, and room must be left when using the reflective type.

3. Protective measures

Normally, the photoelectric switch with DC power supply is equipped with reverse polarity, and the inductive proximity switch does not need polarity protection for AC. DC-powered photoelectric switch transistor output has over-current and short-circuit protection. The protection methods are tempo type or self-locking type. The tempo type produces tempo protection at the critical point of larger output current. When using, the load current needs to be controlled in the photoelectric switch. Within the rated output current. After the self-locking overload short-circuit protection circuit starts, the capacitor and the inductive proximity switch have no output after the power is turned off and the power is re-powered before it can return to normal.

Many units pay too much attention to its application effect when using this inductive proximity switch, but ignore its self-protection. Although the later protection and maintenance have a certain impact on the service life of the proximity switch, the early installation and inductance The self-protection ability of the type proximity switch plays a decisive role in its service life, so relevant enterprise departments must pay more attention.