Industry news

Function introduction of proximity switch

2022-05-21
Identification of proximity switch wiring:
BK (black): generally, it is an output line, and the output is normally open.
BN (brown): it is generally a power line, connected to the positive pole of the power supply.
Bu (blue): it is generally a power line, connected to the negative pole of the power supply.
Wh (white): it is generally an output line, and the output is normally closed.
NPN: the black end is connected to the load, and the other end of the load is connected to the positive pole of the power supply.
PNP: the black end is connected to the load, and the other end of the load is connected to the negative pole of the power supply.
Two wire: the proximity switch is connected to the power supply in series with the load
The load can be the signal of PLC proximity switch, relay coil or digital input module.
Function introduction of proximity switch:
1. Detection distance
Check the start and stop position of the elevator; Vehicle detection position to prevent collision detection of two objects; Detecting the setting position of the machine and the moving parts of the limit position of the machine; Detect the rotation stop position and the open or closed position of the valve.
2. Dimension control
Dimensions of sheet metal punching control device; Automatic selection and differential sheet metal length; Detect the height of automatic loading and unloading pile; Test the length, width, height and volume of the object. The existence of the detection object, the packaging box of the product packaging box is not detected in the production, and the detection of the product.
3. Speed and speed control
Control the conveying speed; Rotating machinery speed; And various pulse generator speed and speed control.
4. Counting and control
Measure the count of high-speed rotating shaft or rotating parts by detecting the production line number.
5. Anomaly detection
Judgment of qualified products and unqualified products; Detect the lack or absence of packing boxes for metal products; Distinguish between metal and non-metal parts; Products are not marked for testing; Crane danger zone alarm; Escalator safety start and stop.
6. Measurement control

Automatic measurement of products or components; Test instrument, instrument pointer range and control quantity or mass flow; Detecting buoy, measuring and controlling surface height flow; Iron buoy to detect stainless steel drum; Measurement range, up and down control; Flow control, control level.