EN11-VSB3AF20

Series:	EN11
Part Status:	Active
Encoder Type:	Mechanical
Output Type:	Quadrature (Incremental)
Pulses per Revolution:	20
Voltage - Supply:	5V
Actuator Type:	6mm Dia Flatted End
Detent:	Yes
Built in Switch:	Yes
Mounting Type:	PCB, Through Hole
Orientation:	Right Angle
Termination Style:	PC Pin
Rotational Life (Cycles Min):	30K

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Encoders: EN11-VSB3AF20 Application Field and Working Principle

Encoders are an essential type of electromechanical device used to electronically measure a rotation, and convert that rotation into an output signal such as a pulse train. They are widely used across a broad range of applications, including medical, aerospace, and industrial applications. One such encoder model is the EN11-VSB3AF20 from European manufacturer Siemens. Let’s take a look at the application field and working principle of this encoder.

Application Field

The Siemens EN11-VSB3AF20 is a high-performance encoder. It is a multi-turn rotary encoder with an integrated safety switch and a restart circuit. It is suitable for extremely safety-critical applications, and has a wide range of applications including motor drives for machine tools, robots, printing machines, and assembly machines. It is also suitable for monitoring and measuring tasks in safety-related applications, as well as in linear drives and mechatronic applications.

Working Principle

The Siemens EN11-VSB3AF20 utilizes two optical tracks, each containing an array of coded information. As the encoder rotates, the coded information on each track is read by separate optical sensors. This information is then converted to analog signals by the amplifier on the sensor board. These analog signals are then converted to digital signals and output as pulse trains. The pulse trains generated by the encoder contain position and direction information, which can be read and interpreted by a control system. The EN11-VSB3AF20 also utilizes a safety switch and restart circuit. The safety switch is activated when the encoder is not moving while the power is on. This prevents accidental movement of the encoder and associated machine parts. The restart circuit is used to reset the encoder to its origin point. This ensures accuracy and repeatability of movement when the machine is restarted.

Conclusion

The Siemens EN11-VSB3AF20 is a high-performance encoder, and is suitable for safety-critical applications, including motor drives for machine tools, robots, printing machines, and assembly machines. It utilizes two optical tracks, and two separate optical sensors, which are used to convert coded information to pulse trains. It also has a safety switch and a restart circuit, which are used to ensure accuracy and repeatability.

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