The rotary encoder is based on the precise measurement of the angular displacement sensor principle of electromagnetic induction, can be used to measure the rotational speed of machinery, mechanical devices can also be speed, speed machining sometimes need to change, you can use the rotary encoder to work in. so how to properly install the rotary encoder it?

Common rotary encoder has five leads, where 3 is a pulse output line, a COM is the end line, a power cord (OC gate output type). Power source may be an external power supply, can also directly use the power of the PLC. Power "-" terminal to be connected with COM encoder "+" power supply terminal and encoder connections. COM of the encoder and the PLC COM input terminal is connected, A, B, Z two-phase pulse output is connected directly to the input of the PLC, A, B is 90 degrees pulses. There is a rotary encoder shielded cable, the use of shielded wire to the ground, improve immunity.