According to the structure, the photoelectric switch can be divided into three types: amplifier separation type, amplifier built-in type and power supply built-in type.
1) Amplifier separation type is to separate the amplifier from the sensor and is made by an ASIC and a hybrid mounting process. Since the sensor has ultra-small and multi-variety characteristics, the amplifier has many functions. Therefore, this type uses the terminal block connection method, and can be used for AC and DC power supplies. With on-off and off-delay function, it can set bright and sound-switching switch, can control 6 kinds of output states, and has two output modes: contact and level.
2) The built-in type of amplifier is integrated with amplifier and sensor. It is made by ASIC and surface mount technology and works with DC power supply. Its response speed (both 0.1ms and 1ms) can detect small and high-speed moving objects. Change the polarity of the power supply to switch between bright and dark, and set the self-diagnosis stable working area indicator. It has two output modes of voltage and current, which can prevent mutual interference and is very convenient in system installation.
3) The built-in type of power supply integrates an amplifier, a sensor and a power supply device, and is fabricated by an ASIC and a surface mount process. It generally uses AC power, which is suitable for replacing the contact type switch at the production site and can be directly used in the high-power control circuit. You can also set the self-diagnosis stable working area indicator. The output is equipped with SSR solid state relay or relay normally open and normally closed contacts to prevent mutual interference and can be installed tightly in the system.