2023-12-27
Keywords for this edition: #EI40NB #IncrementalEncoder #CollectorOpenCircuitOutput #VoltageOutput #LongLineDriveOutput #PushPullOutput
Introduction to Incremental Encoder Products: Incremental encoders convert displacement into periodic electrical signals, which are then transformed into counting pulses. The number of pulses represents the magnitude of the displacement. Typically, two sets of signals, Channel A and Channel B, are output with a 90° phase difference (1/4 of a cycle). By collecting these two sets of signals, the motion speed and direction of the device can be calculated.
In addition to A and B channel signals, incremental encoders may also have an additional Z channel signal. This signal outputs a pulse only after the encoder has turned to a specific position and can be used for reference point positioning.
Four types of outputs for Incremental Encoders:
Incremental encoders can generally be divided into four types based on different output circuits: Collector Open Circuit Output, Voltage Output, Long Line Drive Output, and Push-Pull Output.
Collector Open Circuit Output:
Collector Open Circuit Output uses the emitter of a transistor as the common terminal, and the signal is output from the collector circuit. This can be further categorized into PNP and NPN based on the type of transistor. When connecting at the application end, an external pull-up or pull-down resistor is required at the output end to switch between high and low signal levels.
Voltage Output:
Voltage output uses an indirect pull-up resistor between the collector of an NPN transistor and the power supply or an indirect pull-down resistor between the collector of a PNP transistor and ground, ensuring that the output signal high level is at a specified voltage.
Push-Pull Output:
Push-Pull output contains both NPN and PNP transistors. When NPN is conducting, PNP is cut off, and vice versa, achieving the functions of "push" and "pull." Due to its ability to "push" and "pull," Push-Pull output generally provides higher output power, suitable for driving larger loads or for long-distance transmission.
Long Line Drive Output:
Long Line Drive Output is typically used for high-speed, long-distance data transmission. The circuit uses a dedicated output chip, producing differential signals conforming to the RS422 standard, providing stronger anti-interference capability and longer transmission distances.
Incremental Encoder EI40NB:
The Sentop EI40NB incremental encoder is a Hall effect encoder that converts the mechanical geometric displacement of the shaft into pulses or digital signals through magnetic-electric conversion. Due to its high precision, large measuring range, fast response, digital output, and long mechanical lifespan, it is commonly used in scenarios requiring measurement of speed, rotation direction, angular movement, and relative distance. It finds widespread applications in industrial automation, robotics, aerospace, medical equipment, and other fields.
Mechanical Performance:
Housing: The outer diameter of the housing is φ40mm, made of aluminum alloy with an anodized surface to enhance corrosion resistance, wear resistance, and surface hardness. The product protection level is IP65.
Shaft: Blind hole shaft with a maximum standard aperture of φ10. Custom shaft lengths, special apertures, or special machining on the shaft can be customized according to customer needs.
Expected Lifespan: Over 2,000,000,000 cycles.
Connection Methods: Side cable and rear cable are optional.
Mounting Method: Elastic flange bracket installation.
Rotary Torque: Less than or equal to 1mN•m.
Mechanical Speed: Up to 6000rpm.
Shaft Load: Radial load up to 60N, axial load up to 30N.
Electrical Performance:
Wide Operating Voltage Range: Can achieve 4.75V to 30V wide voltage supply.
Diverse Output Forms: Push-Pull output (standard), Collector Open Circuit Output, Voltage Output, and Long Line Drive Output are optional.
Output Pulse Count: Any pulse count up to 4096 can be set.
Signal Delay: Less than 5μs.
Additionally, the EI40NB incremental encoder's most significant feature lies in its output level, which can vary with changes in input voltage. The high-level amplitude of the output equals the positive power supply voltage, and the low-level amplitude equals the negative power supply voltage (or 0V in a single power supply configuration).
Moreover, the EI40NB incremental encoder includes reverse connection protection and inter-pin short circuit protection functions. Even if wiring is incorrect, it is not easily damaged.
In addition to the EI40NB, Spob's incremental encoder series includes EI18A, EI22A, EI35A, EI36A, EI40A, EI40B, EID58A, and more.
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More information
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