Absolute Encoders

A new and unique approach to motion control

Absolute Encoder

The Rotalink absolute encoder is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 360°. The sensor determines the orientation of a magnet attached to the output shaft and calculates a binary code (10-16 Bit as required). The absolute encoder is tolerant of stray magnetic fields due to a local measurement technique and Hall sensor conditioning circuitry.

The encoder can be programmed at Rotalink to provide either:

Options with and without RS422 interface
SSI interface (3-wire or 2-wire)
PWM output (with non RS422 version)
Quadrature output for incremental encoding is optional upon request
(with non RS422 version)

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Option 1: Non RS422

The non RS422 version provides an SSI interface with the possibility to include PWM output of the absolute position and AB quadrature output.

General Specification
Supply Voltage : 5Vdc
Output : SSI or PWM
Max. Rev. Count : 1rev.
Position retention : no limit
Angle Resolution : 10/12/14/16 bit
Accuracy : 0.9° @ 25°C
Maximum SSI frequency : 1Mhz
Connector : 8 Way Molex

Pin Outs to 8 Way Connector
Circuit 1 : 5V power
Circuit 2 : OV
Circuit 3 : PWM Out
Circuit 4 : Serial Chip_Select
Circuit 5 : Serial Clock
Circuit 6 : Serial Data Out
Circuit 7 : Quadrature B
Circuit 8 : Quadrature A

Option 2: RS422

The RS422 version has the benefit of a robust communication layer for the SSI interface. RS422 is a serial communication standard that is used for transmitting digital data over long distances between devices.

Overall, RS422 is a robust and reliable standard that offers many advantages for long-distance communication and high-speed data transmission.

General Specification
Supply Voltage : 5Vdc
Output : SSI
Max. Rev. Count : 1rev.
Position retention : no limit
Angle Resolution : 10/12/14/16 bit
Accuracy : 0.9° @ 25°C
Maximum SSI frequency : 1Mhz
Connector : 8 Way Molex

Pin Outs to 8 Way Connector
Circuit 1 : 5V power
Circuit 2 : OV
Circuit 3 : Serial Chip_Select A
Circuit 4 : Serial Chip_Select B
Circuit 5 : Serial Clock A
Circuit 6 : Serial Clock B
Circuit 7 : Serial Data Out A
Circuit 8 : Serial Data Out B

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Our Expertise in Motion

Rotalink produce products for a wide range of different applications. Our miniature gearmotors are used in everything from vending machines and ATMs to medical equipment and fluid control systems.

Absolute Encoder

Option 1: Non RS422

Option 2: RS422

Our Expertise in Motion

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