E25BB-4H-SB-100-ABC-28V/V-SM16-S Sensors, Transducers

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Encoders are components used in a wide array of equipment and systems across many industries for motion control and sensing purposes. The type of encoder referred to in this article is an Incremental encoder, which works by detecting the pair of pattern lines printed on a rotating disk. Typical uses for incremental encoders include counting the number of pulses per revolution, which can be used to measure the number of revolutions per minute from a spinning motor, calculate the speed, position and direction of a motor, as well as many other applications requiring precise motion control.

The particular encoder in question model E25BB-4H-SB-100-ABC-28V/V-SM16-S is used in many applications including robotics, automated manufacturing systems, industrial motion control, automotive engineering, and aerospace. The key features with this particular encoder include its robust construction, high level of accuracy, large bearing size resulting in high load and axial capacity, and wide electrical supply range of 28V/V. In addition to these features, the encoder also provides high resolution inputs and outputs to allow for control of complex motion control systems.

The basis of the working principle for the E25BB-4H-SB-100-ABC-28V/V-SM16-S encoder is the printed pattern of two lines used to generate two sinusoidal pulses when it rotates: the reference pulse (A or B) and the auxiliary pulse (C), which can be filtered to obtain the direction of rotation.

The A and B channels must be connected to the input of a counter, or directly to a drive logic circuit block. One line of the pattern is formed by several short and wide spot pairs, relative to each other with a 120° between them. The other line is the same, but displaced by 90° in the rotation cycle. The closing or opening of the lines produces pulses in the sensor output.

The C channel measures the speed of rotation, and can be connected to a conversion logic block in order to calculate the exact speed. Each time a C pulse is generated it’s equivalent to an increment in the shaft rotation of a few thousandths of a degree. The C channel can also be used to measure direction. When the encoder rotation is counterclockwise, the C channel will provide the same polarity pulse as the A and B channels, whereas for clockwise rotation the polarity of the C channel will be opposite to that of the A and B channels.

To sum up, the E25BB-4H-SB-100-ABC-28V/V-SM16-S encoder is a robust and accurate incremental encoder suitable for many industrial applications such as robotics, automated manufacturing systems, industrial motion control, automotive engineering, and aerospace. It provides reference and auxiliary pulses which can be used to calculate the speed, position, direction and other motion control functions in complex systems. The main features that make it attractive to industry include its robust construction, high level of accuracy, large bearing size resulting in high load and axial capacity, high resolution inputs and outputs, and wide electrical supply range of 28V/V.

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